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Must be a power of two\n * greater than 1 (and less than 1 << 30).\n *\/\n private static final int MINIMUM_CAPACITY = 4;\n\n \/**\n * An empty table shared by all zero-capacity maps (typically from default\n * constructor). It is never written to, and replaced on first put. Its size\n * is set to half the minimum, so that the first resize will create a\n * minimum-sized table.\n *\/\n private static final Entry[] EMPTY_TABLE\n = new HashMapEntry[MINIMUM_CAPACITY >>> 1];\n\n \/**\n * Constructs a new empty {@code HashMap} instance.\n *\/\n @SuppressWarnings("unchecked")\n public HashMap() {\n table = (HashMapEntry<K, V>[]) EMPTY_TABLE;\n threshold = -1; \/\/ Forces first put invocation to replace EMPTY_TABLE\n }<\/code><\/pre>\n\u53ef\u89c1\uff0cHashMap\u7684\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\u9ed8\u8ba4\u4f1a\u521b\u5efa\u4e00\u4e2a\u5927\u5c0f\u4e3a2\u7684\u6570\u7ec4\u3002\n...\u7248\u672c\u592a\u65e7\uff0c\u5c31\u4e0d\u5f80\u4e0b\u5206\u6790\u4e86\u3002<\/p>\n<\/span>JDK1.6\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/blog.csdn.net\/rocksteadypro\/article\/details\/80082822<\/a><\/p>\n<\/span>JDK1.7\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/www.cnblogs.com\/xiaolovewei\/p\/7993521.html<\/a><\/p>\nhttps:\/\/www.cnblogs.com\/xiaozhongfeixiang\/archive\/2019\/09\/23\/11548563.html<\/a><\/p>\n\u9700\u8981\u6ce8\u610f\u7684\u70b9\uff1a<\/p>\n\n\n<\/span>key\u662f\u5982\u4f55\u8ba1\u7b97\u51fa\u6570\u7ec4\u7684\u4e0b\u6807\u7684<\/span><\/h2>\n\n\u54c8\u5e0c\u503c\u6c42\u6570\u7ec4\u4e0b\u6807<\/p>\nhash & (tab.length - 1);<\/code><\/pre>\n\u6269\u5bb9\u4e3a\u5565\u662f2\u7684\u500d\u6570\uff0c\u548c\u4e0a\u9762\u8fd9\u4e2a\u516c\u5f0f\u4e5f\u662f\u76f8\u5173\u7684\uff1ahttps:\/\/blog.csdn.net\/ptsx0607\/article\/details\/68945883<\/a>,\u4fdd\u8bc1\u4e86\u6563\u5217\u7684\u5747\u5300\u6027,\u54c8\u5e0c\u78b0\u649e\u7684\u673a\u7387\u5c31\u4f1a\u51cf\u5c0f\u3002<\/p>\n<\/li>\n\n<\/span>\u5934\u63d2\u6cd5\u4e0e\u94fe\u8868<\/span><\/h2>\nhttps:\/\/blog.csdn.net\/insomsia\/article\/details\/88367436<\/a>\n\u770bput\u65b9\u6cd5\uff1a<\/p>\n @Override public V put(K key, V value) {\n if (key == null) {\n return putValueForNullKey(value);\n }\n\n int hash = secondaryHash(key);\n HashMapEntry[] tab = table;\n int index = hash & (tab.length - 1);\n for (HashMapEntry e = tab[index]; e != null; e = e.next) {\n if (e.hash == hash && key.equals(e.key)) { \n preModify(e);\n V oldValue = e.value;\n e.value = value;\n return oldValue;\n }\n }\n\n \/\/ No entry for (non-null) key is present; create one\n modCount++;\n if (size++ > threshold) {\n tab = doubleCapacity();\n index = hash & (tab.length - 1);\n }\n addNewEntry(key, value, hash, index);\n return null;\n}\n<\/code><\/pre>\n\u91cd\u590d\u5143\u7d20\u5224\u65ad:hash\u76f8\u540c\uff0ckey\u76f8\u540c\u7684\u80af\u5b9a\u662f\u540c\u4e00\u4e2a\u5143\u7d20\u3002<\/strong><\/p>\ne.hash == hash && key.equals(e.key)<\/code><\/pre>\n\u4f46\u662f\u53ef\u80fd\u4e0d\u540c\u7684\u5143\u7d20hash\u503c\u4e0d\u4e00\u6837\uff0c\u7b97\u51fa\u7684index\u5374\u4e00\u6837\uff0c\u4f46\u662f\u53c8\u4e0d\u662f\u540c\u4e00\u4e2a\u5143\u7d20(\u8fd9\u5c31\u662f\u54c8\u5e0c\u78b0\u649e\u95ee\u9898\uff0c\u54c8\u5e0c\u7b97\u6cd5\u65e0\u6cd5\u9003\u907f\u8fd9\u4e2a\u95ee\u9898<\/strong>)\uff0c\u6570\u7ec4\u4e2d\u7684\u8fd9\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u5df2\u7ecf\u88ab\u5360\u636e\u4e86\uff0c\u90a3\u4e48\u6211\u600e\u4e48\u5b58\u50a8\u8fd9\u4e2a\u65b0\u7684\u5143\u7d20\u5462\uff1f\n\u8bf7\u770bHashMapEntry\u8fd9\u4e2a\u7c7b\uff1a\n\n\u518d\u770b\u6dfb\u52a0HashMapEntry\u7684\u65b9\u6cd5\uff1a<\/p>\nvoid addNewEntry(K key, V value, int hash, int index) {\n table[index] = new HashMapEntry(key, value, hash, table[index]);\n}\n\nHashMapEntry(K key, V value, int hash, HashMapEntry next) {\n this.key = key;\n this.value = value;\n this.hash = hash;\n this.next = next;\n }<\/code><\/pre>\n\n\u5bf9\u4e8eaddNewEntry\u65b9\u6cd5\n\u5982\u679cindex\u5904\u672c\u8eab\u6ca1\u6709\u5143\u7d20\u5360\u636e\uff0c\u6b64\u65f6table[index]\u5c31\u662fnull\u3002\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662fnull\uff1b<\/p>\n\u5982\u679cindex\u5904\u672c\u8eab\u6709\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u4e86\uff0c\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u7684\u5143\u7d20\u3002\u5934\u63d2\u6cd5\u5c31\u662f\u8fd9\u4e48\u6765\u7684\u3002<\/p>\nkey\u4e3anull\uff0cHashMap\u662f\u5355\u72ec\u7528\u4e00\u4e2aHashMapEntry\u53d8\u91cf\u6765\u5b58\u50a8\u7684\uff0c\u5e76\u4e0d\u662f\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\u6240\u6709\u7684\u589e\u5220\u6539\u67e5\n\u90fd\u662f\u5148\u5224\u65ad\u7684key\u662f\u5426\u4e3anull\u3002<\/p>\n<\/blockquote>\n\u5bf9\u4e8e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u4eba\u6765\u8bf4\uff0c\u5f97\u51fa\u4e0a\u9762\u7684\u7ed3\u8bba\u53ef\u80fd\u4e0d\u96be\u3002\u4f46\u662f\u5bf9\u4e8e\u975e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u6211\u6765\u8bf4\uff0c\u6162\u6162\u7684\u53d1\u73b0\u4e86\u6570\u636e\u7ed3\u6784\u4e4b\u7c7b\uff0c\u7b80\u76f4\u592a\u7f8e\u5999\u4e86\uff01<\/p>\n<\/li>\n\n\u54c8\u5e0c\u51b2\u7a81\nhttps:\/\/www.iteye.com\/blog\/xiaolu123456-1485349<\/a>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\n<\/li>\n\n\u5e76\u53d1\u5bfc\u81f4\u7684\u6b7b\u5faa\u73af\u95ee\u9898\nhttps:\/\/blog.csdn.net\/pange1991\/article\/details\/82377980<\/a>\nhttps:\/\/www.jianshu.com\/p\/61a829fa4e49<\/a><\/p>\n<\/li>\n<\/ul>\n<\/span>JDK1.8\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u77e5\u8bc6\u70b9\u9884\u5907-\u7ea2\u9ed1\u6811<\/a><\/span><\/h2>\nhttps:\/\/blog.csdn.net\/u010890358\/article\/details\/80496144<\/a> \uff08\u8be6\u7ec6\u89e3\u91ca\u6bcf\u884c\u4ee3\u7801\uff09<\/p>\nhttps:\/\/www.jianshu.com\/p\/400f3c019557<\/a><\/p>\n\u6536\u85cf <\/i><\/button>","protected":false},"excerpt":{"rendered":"\u4e0d\u540c\u7248\u672c\u7684JDK\u7684HashMap\u7684\u5e95\u5c42\u5b9e\u73b0\u5747\u6709\u6240\u4e0d\u540c \u76ee\u5f55 JDK\u5404\u4e2a\u7248\u672c\u7684\u6e90\u7801\u67e5\u770bHashMap\u7684 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\u5404\u4e2a\u7248\u672c\u7684\u6e90\u7801\u67e5\u770b\uff1ahttps:\/\/blog.csdn.net\/zuochao_2013\/article\/details\/79624579<\/a><\/p>\nandroid\u5404\u4e2a\u7248\u672c\u5bf9\u5e94\u7684JDK\u7248\u672c\nhttps:\/\/blog.csdn.net\/u010825468\/article\/details\/78909550<\/a>\n\u901a\u8fc7\u6539\u53d8build.gradle\u91cc\u7684\u7248\u672c\uff0c\u5373\u53ef\u67e5\u770b\u5bf9\u5e94JDK\u7684\u6e90\u7801\u3002<\/p>\n\u540e\u6765\u6211\u53d1\u73b0\u4e0a\u9762\u7684\u8fd9\u4e2a\u8868\u4e0d\u51c6\u786e\uff0candroid\u6211\u7528SDK API 19\uff0c\u7136\u540e\u6309\u7167\u4e0b\u9762\u7684\u65b9\u6cd5\uff0c\u7528010Editor\u6765\u67e5\u770bHashMap.class\uff0c\u53d1\u73b0\u7adf\u7136\u662fJDK1.5\u3002\nhttps:\/\/blog.csdn.net\/mengxiangxingdong\/article\/details\/89437087<\/a><\/p>\n\n\u7ecf\u6211\u6d4b\u8bd5\uff0c\u771f\u6b63\u7684\u60c5\u51b5\u662fAPI19\u300120\u90fd\u662fJDK1.5\uff0c\u7136\u540e\u5230\u4e86API21\u76f4\u63a5\u5c31JDK1.7\u4e86\uff0c\u6ca1\u6709\u7528\u5230JDK1.6\u3002<\/p>\n\u5927\u5751\uff1a<\/strong>\n\u770b\u4e86\u5f88\u591a\u7684\u535a\u5ba2\uff0c\u4f46\u662f\u7528android.jar\u91cc\u7684\u6e90\u7801\u4e00\u5bf9\u6bd4\uff0c\u600e\u4e48\u4e5f\u5bf9\u4e0d\u4e0a\u3002\nhttp:\/\/www.apkbus.com\/thread-567645-1-1.html<\/a>\n\u539f\u6765android\u6e90\u7801\u91cc\u7684JDK\u548cJava\u7684JDK\u4e0d\u662f\u4e00\u4e2a\u4e1c\u897f\u3002<\/p>\n<\/span>HashMap\u7684\u7279\u6027<\/span><\/h1>\n\n\u7ebf\u7a0b\u4e0d\u5b89\u5168<\/li>\n\u67e5\u8be2\u5feb<\/li>\n<\/ul>\n<\/span>\u5404\u4e2a\u7248\u672c\u7684HashMap\u7684\u533a\u522b<\/span><\/h1>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\nhttps:\/\/www.2cto.com\/kf\/201707\/654203.html<\/a><\/p>\nhttps:\/\/blog.csdn.net\/qq_36520235\/article\/details\/82417949<\/a><\/p>\n<\/span>JDK1.8\u7684HashMap\u5b9e\u73b0<\/span><\/h1>\nhttps:\/\/www.cnblogs.com\/little-fly\/p\/7344285.html<\/a><\/p>\nhttps:\/\/blog.csdn.net\/qq_22200097\/article\/details\/82791479<\/a><\/p>\n<\/span>JDK1.7\u53ca\u4ee5\u4e0b\u7684HashMap\u5b9e\u73b0<\/span><\/h1>\n\nHashMap\u7684\u4e3b\u5e72\u662f\u6570\u7ec4(\u4e0d\u8981\u4ee5\u4e3a\u5e26\u4e2aHash\u5c31\u548cHashTable\u626f\u4e0a\u5173\u7cfb\u4e86)\uff0c\u6570\u7ec4\u7684\u5143\u7d20\u662fHashMapEntry<\/li>\nHashMapEntry\u662f\u4e00\u4e2a\u94fe\u8868\u7ed3\u6784<\/li>\n<\/ul>\nhttps:\/\/blog.csdn.net\/qq_38455201\/article\/details\/80732839<\/a><\/p>\nhttps:\/\/blog.csdn.net\/C18298182575\/article\/details\/87167323<\/a><\/p>\n<\/span>JDK1.5\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u4e3b\u5e72\u6570\u7ec4\u521d\u59cb\u5316<\/span><\/h2>\n \/**\n * Min capacity (other than zero) for a HashMap. Must be a power of two\n * greater than 1 (and less than 1 << 30).\n *\/\n private static final int MINIMUM_CAPACITY = 4;\n\n \/**\n * An empty table shared by all zero-capacity maps (typically from default\n * constructor). It is never written to, and replaced on first put. Its size\n * is set to half the minimum, so that the first resize will create a\n * minimum-sized table.\n *\/\n private static final Entry[] EMPTY_TABLE\n = new HashMapEntry[MINIMUM_CAPACITY >>> 1];\n\n \/**\n * Constructs a new empty {@code HashMap} instance.\n *\/\n @SuppressWarnings("unchecked")\n public HashMap() {\n table = (HashMapEntry<K, V>[]) EMPTY_TABLE;\n threshold = -1; \/\/ Forces first put invocation to replace EMPTY_TABLE\n }<\/code><\/pre>\n\u53ef\u89c1\uff0cHashMap\u7684\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\u9ed8\u8ba4\u4f1a\u521b\u5efa\u4e00\u4e2a\u5927\u5c0f\u4e3a2\u7684\u6570\u7ec4\u3002\n...\u7248\u672c\u592a\u65e7\uff0c\u5c31\u4e0d\u5f80\u4e0b\u5206\u6790\u4e86\u3002<\/p>\n<\/span>JDK1.6\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/blog.csdn.net\/rocksteadypro\/article\/details\/80082822<\/a><\/p>\n<\/span>JDK1.7\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/www.cnblogs.com\/xiaolovewei\/p\/7993521.html<\/a><\/p>\nhttps:\/\/www.cnblogs.com\/xiaozhongfeixiang\/archive\/2019\/09\/23\/11548563.html<\/a><\/p>\n\u9700\u8981\u6ce8\u610f\u7684\u70b9\uff1a<\/p>\n\n\n<\/span>key\u662f\u5982\u4f55\u8ba1\u7b97\u51fa\u6570\u7ec4\u7684\u4e0b\u6807\u7684<\/span><\/h2>\n\n\u54c8\u5e0c\u503c\u6c42\u6570\u7ec4\u4e0b\u6807<\/p>\nhash & (tab.length - 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modCount++;\n if (size++ > threshold) {\n tab = doubleCapacity();\n index = hash & (tab.length - 1);\n }\n addNewEntry(key, value, hash, index);\n return null;\n}\n<\/code><\/pre>\n\u91cd\u590d\u5143\u7d20\u5224\u65ad:hash\u76f8\u540c\uff0ckey\u76f8\u540c\u7684\u80af\u5b9a\u662f\u540c\u4e00\u4e2a\u5143\u7d20\u3002<\/strong><\/p>\ne.hash == hash && key.equals(e.key)<\/code><\/pre>\n\u4f46\u662f\u53ef\u80fd\u4e0d\u540c\u7684\u5143\u7d20hash\u503c\u4e0d\u4e00\u6837\uff0c\u7b97\u51fa\u7684index\u5374\u4e00\u6837\uff0c\u4f46\u662f\u53c8\u4e0d\u662f\u540c\u4e00\u4e2a\u5143\u7d20(\u8fd9\u5c31\u662f\u54c8\u5e0c\u78b0\u649e\u95ee\u9898\uff0c\u54c8\u5e0c\u7b97\u6cd5\u65e0\u6cd5\u9003\u907f\u8fd9\u4e2a\u95ee\u9898<\/strong>)\uff0c\u6570\u7ec4\u4e2d\u7684\u8fd9\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u5df2\u7ecf\u88ab\u5360\u636e\u4e86\uff0c\u90a3\u4e48\u6211\u600e\u4e48\u5b58\u50a8\u8fd9\u4e2a\u65b0\u7684\u5143\u7d20\u5462\uff1f\n\u8bf7\u770bHashMapEntry\u8fd9\u4e2a\u7c7b\uff1a\n\n\u518d\u770b\u6dfb\u52a0HashMapEntry\u7684\u65b9\u6cd5\uff1a<\/p>\nvoid addNewEntry(K key, V value, int hash, int index) {\n table[index] = new HashMapEntry(key, value, hash, table[index]);\n}\n\nHashMapEntry(K key, V value, int hash, HashMapEntry next) {\n this.key = key;\n this.value = value;\n this.hash = hash;\n this.next = next;\n }<\/code><\/pre>\n\n\u5bf9\u4e8eaddNewEntry\u65b9\u6cd5\n\u5982\u679cindex\u5904\u672c\u8eab\u6ca1\u6709\u5143\u7d20\u5360\u636e\uff0c\u6b64\u65f6table[index]\u5c31\u662fnull\u3002\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662fnull\uff1b<\/p>\n\u5982\u679cindex\u5904\u672c\u8eab\u6709\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u4e86\uff0c\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u7684\u5143\u7d20\u3002\u5934\u63d2\u6cd5\u5c31\u662f\u8fd9\u4e48\u6765\u7684\u3002<\/p>\nkey\u4e3anull\uff0cHashMap\u662f\u5355\u72ec\u7528\u4e00\u4e2aHashMapEntry\u53d8\u91cf\u6765\u5b58\u50a8\u7684\uff0c\u5e76\u4e0d\u662f\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\u6240\u6709\u7684\u589e\u5220\u6539\u67e5\n\u90fd\u662f\u5148\u5224\u65ad\u7684key\u662f\u5426\u4e3anull\u3002<\/p>\n<\/blockquote>\n\u5bf9\u4e8e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u4eba\u6765\u8bf4\uff0c\u5f97\u51fa\u4e0a\u9762\u7684\u7ed3\u8bba\u53ef\u80fd\u4e0d\u96be\u3002\u4f46\u662f\u5bf9\u4e8e\u975e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u6211\u6765\u8bf4\uff0c\u6162\u6162\u7684\u53d1\u73b0\u4e86\u6570\u636e\u7ed3\u6784\u4e4b\u7c7b\uff0c\u7b80\u76f4\u592a\u7f8e\u5999\u4e86\uff01<\/p>\n<\/li>\n\n\u54c8\u5e0c\u51b2\u7a81\nhttps:\/\/www.iteye.com\/blog\/xiaolu123456-1485349<\/a>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\n<\/li>\n\n\u5e76\u53d1\u5bfc\u81f4\u7684\u6b7b\u5faa\u73af\u95ee\u9898\nhttps:\/\/blog.csdn.net\/pange1991\/article\/details\/82377980<\/a>\nhttps:\/\/www.jianshu.com\/p\/61a829fa4e49<\/a><\/p>\n<\/li>\n<\/ul>\n<\/span>JDK1.8\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u77e5\u8bc6\u70b9\u9884\u5907-\u7ea2\u9ed1\u6811<\/a><\/span><\/h2>\nhttps:\/\/blog.csdn.net\/u010890358\/article\/details\/80496144<\/a> \uff08\u8be6\u7ec6\u89e3\u91ca\u6bcf\u884c\u4ee3\u7801\uff09<\/p>\nhttps:\/\/www.jianshu.com\/p\/400f3c019557<\/a><\/p>\n\u6536\u85cf <\/i><\/button>","protected":false},"excerpt":{"rendered":"\u4e0d\u540c\u7248\u672c\u7684JDK\u7684HashMap\u7684\u5e95\u5c42\u5b9e\u73b0\u5747\u6709\u6240\u4e0d\u540c \u76ee\u5f55 JDK\u5404\u4e2a\u7248\u672c\u7684\u6e90\u7801\u67e5\u770bHashMap\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[597],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7993"}],"version-history":[{"count":4,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions"}],"predecessor-version":[{"id":8000,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions\/8000"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7993"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
android\u5404\u4e2a\u7248\u672c\u5bf9\u5e94\u7684JDK\u7248\u672c\nhttps:\/\/blog.csdn.net\/u010825468\/article\/details\/78909550<\/a>\n\u901a\u8fc7\u6539\u53d8build.gradle\u91cc\u7684\u7248\u672c\uff0c\u5373\u53ef\u67e5\u770b\u5bf9\u5e94JDK\u7684\u6e90\u7801\u3002<\/p>\n\u540e\u6765\u6211\u53d1\u73b0\u4e0a\u9762\u7684\u8fd9\u4e2a\u8868\u4e0d\u51c6\u786e\uff0candroid\u6211\u7528SDK API 19\uff0c\u7136\u540e\u6309\u7167\u4e0b\u9762\u7684\u65b9\u6cd5\uff0c\u7528010Editor\u6765\u67e5\u770bHashMap.class\uff0c\u53d1\u73b0\u7adf\u7136\u662fJDK1.5\u3002\nhttps:\/\/blog.csdn.net\/mengxiangxingdong\/article\/details\/89437087<\/a><\/p>\n\n\u7ecf\u6211\u6d4b\u8bd5\uff0c\u771f\u6b63\u7684\u60c5\u51b5\u662fAPI19\u300120\u90fd\u662fJDK1.5\uff0c\u7136\u540e\u5230\u4e86API21\u76f4\u63a5\u5c31JDK1.7\u4e86\uff0c\u6ca1\u6709\u7528\u5230JDK1.6\u3002<\/p>\n\u5927\u5751\uff1a<\/strong>\n\u770b\u4e86\u5f88\u591a\u7684\u535a\u5ba2\uff0c\u4f46\u662f\u7528android.jar\u91cc\u7684\u6e90\u7801\u4e00\u5bf9\u6bd4\uff0c\u600e\u4e48\u4e5f\u5bf9\u4e0d\u4e0a\u3002\nhttp:\/\/www.apkbus.com\/thread-567645-1-1.html<\/a>\n\u539f\u6765android\u6e90\u7801\u91cc\u7684JDK\u548cJava\u7684JDK\u4e0d\u662f\u4e00\u4e2a\u4e1c\u897f\u3002<\/p>\n<\/span>HashMap\u7684\u7279\u6027<\/span><\/h1>\n\n\u7ebf\u7a0b\u4e0d\u5b89\u5168<\/li>\n\u67e5\u8be2\u5feb<\/li>\n<\/ul>\n<\/span>\u5404\u4e2a\u7248\u672c\u7684HashMap\u7684\u533a\u522b<\/span><\/h1>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\nhttps:\/\/www.2cto.com\/kf\/201707\/654203.html<\/a><\/p>\nhttps:\/\/blog.csdn.net\/qq_36520235\/article\/details\/82417949<\/a><\/p>\n<\/span>JDK1.8\u7684HashMap\u5b9e\u73b0<\/span><\/h1>\nhttps:\/\/www.cnblogs.com\/little-fly\/p\/7344285.html<\/a><\/p>\nhttps:\/\/blog.csdn.net\/qq_22200097\/article\/details\/82791479<\/a><\/p>\n<\/span>JDK1.7\u53ca\u4ee5\u4e0b\u7684HashMap\u5b9e\u73b0<\/span><\/h1>\n\nHashMap\u7684\u4e3b\u5e72\u662f\u6570\u7ec4(\u4e0d\u8981\u4ee5\u4e3a\u5e26\u4e2aHash\u5c31\u548cHashTable\u626f\u4e0a\u5173\u7cfb\u4e86)\uff0c\u6570\u7ec4\u7684\u5143\u7d20\u662fHashMapEntry<\/li>\nHashMapEntry\u662f\u4e00\u4e2a\u94fe\u8868\u7ed3\u6784<\/li>\n<\/ul>\nhttps:\/\/blog.csdn.net\/qq_38455201\/article\/details\/80732839<\/a><\/p>\nhttps:\/\/blog.csdn.net\/C18298182575\/article\/details\/87167323<\/a><\/p>\n<\/span>JDK1.5\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u4e3b\u5e72\u6570\u7ec4\u521d\u59cb\u5316<\/span><\/h2>\n \/**\n * Min capacity (other than zero) for a HashMap. Must be a power of two\n * greater than 1 (and less than 1 << 30).\n *\/\n private static final int MINIMUM_CAPACITY = 4;\n\n \/**\n * An empty table shared by all zero-capacity maps (typically from default\n * constructor). It is never written to, and replaced on first put. Its size\n * is set to half the minimum, so that the first resize will create a\n * minimum-sized table.\n *\/\n private static final Entry[] EMPTY_TABLE\n = new HashMapEntry[MINIMUM_CAPACITY >>> 1];\n\n \/**\n * Constructs a new empty {@code HashMap} instance.\n *\/\n @SuppressWarnings("unchecked")\n public HashMap() {\n table = (HashMapEntry<K, V>[]) EMPTY_TABLE;\n threshold = -1; \/\/ Forces first put invocation to replace EMPTY_TABLE\n }<\/code><\/pre>\n\u53ef\u89c1\uff0cHashMap\u7684\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\u9ed8\u8ba4\u4f1a\u521b\u5efa\u4e00\u4e2a\u5927\u5c0f\u4e3a2\u7684\u6570\u7ec4\u3002\n...\u7248\u672c\u592a\u65e7\uff0c\u5c31\u4e0d\u5f80\u4e0b\u5206\u6790\u4e86\u3002<\/p>\n<\/span>JDK1.6\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/blog.csdn.net\/rocksteadypro\/article\/details\/80082822<\/a><\/p>\n<\/span>JDK1.7\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/www.cnblogs.com\/xiaolovewei\/p\/7993521.html<\/a><\/p>\nhttps:\/\/www.cnblogs.com\/xiaozhongfeixiang\/archive\/2019\/09\/23\/11548563.html<\/a><\/p>\n\u9700\u8981\u6ce8\u610f\u7684\u70b9\uff1a<\/p>\n\n\n<\/span>key\u662f\u5982\u4f55\u8ba1\u7b97\u51fa\u6570\u7ec4\u7684\u4e0b\u6807\u7684<\/span><\/h2>\n\n\u54c8\u5e0c\u503c\u6c42\u6570\u7ec4\u4e0b\u6807<\/p>\nhash & (tab.length - 1);<\/code><\/pre>\n\u6269\u5bb9\u4e3a\u5565\u662f2\u7684\u500d\u6570\uff0c\u548c\u4e0a\u9762\u8fd9\u4e2a\u516c\u5f0f\u4e5f\u662f\u76f8\u5173\u7684\uff1ahttps:\/\/blog.csdn.net\/ptsx0607\/article\/details\/68945883<\/a>,\u4fdd\u8bc1\u4e86\u6563\u5217\u7684\u5747\u5300\u6027,\u54c8\u5e0c\u78b0\u649e\u7684\u673a\u7387\u5c31\u4f1a\u51cf\u5c0f\u3002<\/p>\n<\/li>\n\n<\/span>\u5934\u63d2\u6cd5\u4e0e\u94fe\u8868<\/span><\/h2>\nhttps:\/\/blog.csdn.net\/insomsia\/article\/details\/88367436<\/a>\n\u770bput\u65b9\u6cd5\uff1a<\/p>\n @Override public V put(K key, V value) {\n if (key == null) {\n return putValueForNullKey(value);\n }\n\n int hash = secondaryHash(key);\n HashMapEntry[] tab = table;\n int index = hash & (tab.length - 1);\n for (HashMapEntry e = tab[index]; e != null; e = e.next) {\n if (e.hash == hash && key.equals(e.key)) { \n preModify(e);\n V oldValue = e.value;\n e.value = value;\n return oldValue;\n }\n }\n\n \/\/ No entry for (non-null) key is present; create one\n modCount++;\n if (size++ > threshold) {\n tab = doubleCapacity();\n index = hash & (tab.length - 1);\n }\n addNewEntry(key, value, hash, index);\n return null;\n}\n<\/code><\/pre>\n\u91cd\u590d\u5143\u7d20\u5224\u65ad:hash\u76f8\u540c\uff0ckey\u76f8\u540c\u7684\u80af\u5b9a\u662f\u540c\u4e00\u4e2a\u5143\u7d20\u3002<\/strong><\/p>\ne.hash == hash && key.equals(e.key)<\/code><\/pre>\n\u4f46\u662f\u53ef\u80fd\u4e0d\u540c\u7684\u5143\u7d20hash\u503c\u4e0d\u4e00\u6837\uff0c\u7b97\u51fa\u7684index\u5374\u4e00\u6837\uff0c\u4f46\u662f\u53c8\u4e0d\u662f\u540c\u4e00\u4e2a\u5143\u7d20(\u8fd9\u5c31\u662f\u54c8\u5e0c\u78b0\u649e\u95ee\u9898\uff0c\u54c8\u5e0c\u7b97\u6cd5\u65e0\u6cd5\u9003\u907f\u8fd9\u4e2a\u95ee\u9898<\/strong>)\uff0c\u6570\u7ec4\u4e2d\u7684\u8fd9\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u5df2\u7ecf\u88ab\u5360\u636e\u4e86\uff0c\u90a3\u4e48\u6211\u600e\u4e48\u5b58\u50a8\u8fd9\u4e2a\u65b0\u7684\u5143\u7d20\u5462\uff1f\n\u8bf7\u770bHashMapEntry\u8fd9\u4e2a\u7c7b\uff1a\n\n\u518d\u770b\u6dfb\u52a0HashMapEntry\u7684\u65b9\u6cd5\uff1a<\/p>\nvoid addNewEntry(K key, V value, int hash, int index) {\n table[index] = new HashMapEntry(key, value, hash, table[index]);\n}\n\nHashMapEntry(K key, V value, int hash, HashMapEntry next) {\n this.key = key;\n this.value = value;\n this.hash = hash;\n this.next = next;\n }<\/code><\/pre>\n\n\u5bf9\u4e8eaddNewEntry\u65b9\u6cd5\n\u5982\u679cindex\u5904\u672c\u8eab\u6ca1\u6709\u5143\u7d20\u5360\u636e\uff0c\u6b64\u65f6table[index]\u5c31\u662fnull\u3002\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662fnull\uff1b<\/p>\n\u5982\u679cindex\u5904\u672c\u8eab\u6709\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u4e86\uff0c\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u7684\u5143\u7d20\u3002\u5934\u63d2\u6cd5\u5c31\u662f\u8fd9\u4e48\u6765\u7684\u3002<\/p>\nkey\u4e3anull\uff0cHashMap\u662f\u5355\u72ec\u7528\u4e00\u4e2aHashMapEntry\u53d8\u91cf\u6765\u5b58\u50a8\u7684\uff0c\u5e76\u4e0d\u662f\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\u6240\u6709\u7684\u589e\u5220\u6539\u67e5\n\u90fd\u662f\u5148\u5224\u65ad\u7684key\u662f\u5426\u4e3anull\u3002<\/p>\n<\/blockquote>\n\u5bf9\u4e8e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u4eba\u6765\u8bf4\uff0c\u5f97\u51fa\u4e0a\u9762\u7684\u7ed3\u8bba\u53ef\u80fd\u4e0d\u96be\u3002\u4f46\u662f\u5bf9\u4e8e\u975e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u6211\u6765\u8bf4\uff0c\u6162\u6162\u7684\u53d1\u73b0\u4e86\u6570\u636e\u7ed3\u6784\u4e4b\u7c7b\uff0c\u7b80\u76f4\u592a\u7f8e\u5999\u4e86\uff01<\/p>\n<\/li>\n\n\u54c8\u5e0c\u51b2\u7a81\nhttps:\/\/www.iteye.com\/blog\/xiaolu123456-1485349<\/a>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\n<\/li>\n\n\u5e76\u53d1\u5bfc\u81f4\u7684\u6b7b\u5faa\u73af\u95ee\u9898\nhttps:\/\/blog.csdn.net\/pange1991\/article\/details\/82377980<\/a>\nhttps:\/\/www.jianshu.com\/p\/61a829fa4e49<\/a><\/p>\n<\/li>\n<\/ul>\n<\/span>JDK1.8\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u77e5\u8bc6\u70b9\u9884\u5907-\u7ea2\u9ed1\u6811<\/a><\/span><\/h2>\nhttps:\/\/blog.csdn.net\/u010890358\/article\/details\/80496144<\/a> \uff08\u8be6\u7ec6\u89e3\u91ca\u6bcf\u884c\u4ee3\u7801\uff09<\/p>\nhttps:\/\/www.jianshu.com\/p\/400f3c019557<\/a><\/p>\n\u6536\u85cf <\/i><\/button>","protected":false},"excerpt":{"rendered":"\u4e0d\u540c\u7248\u672c\u7684JDK\u7684HashMap\u7684\u5e95\u5c42\u5b9e\u73b0\u5747\u6709\u6240\u4e0d\u540c \u76ee\u5f55 JDK\u5404\u4e2a\u7248\u672c\u7684\u6e90\u7801\u67e5\u770bHashMap\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[597],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7993"}],"version-history":[{"count":4,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions"}],"predecessor-version":[{"id":8000,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions\/8000"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7993"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\u540e\u6765\u6211\u53d1\u73b0\u4e0a\u9762\u7684\u8fd9\u4e2a\u8868\u4e0d\u51c6\u786e\uff0candroid\u6211\u7528SDK API 19\uff0c\u7136\u540e\u6309\u7167\u4e0b\u9762\u7684\u65b9\u6cd5\uff0c\u7528010Editor\u6765\u67e5\u770bHashMap.class\uff0c\u53d1\u73b0\u7adf\u7136\u662fJDK1.5\u3002\nhttps:\/\/blog.csdn.net\/mengxiangxingdong\/article\/details\/89437087<\/a><\/p>\n\n\u7ecf\u6211\u6d4b\u8bd5\uff0c\u771f\u6b63\u7684\u60c5\u51b5\u662fAPI19\u300120\u90fd\u662fJDK1.5\uff0c\u7136\u540e\u5230\u4e86API21\u76f4\u63a5\u5c31JDK1.7\u4e86\uff0c\u6ca1\u6709\u7528\u5230JDK1.6\u3002<\/p>\n\u5927\u5751\uff1a<\/strong>\n\u770b\u4e86\u5f88\u591a\u7684\u535a\u5ba2\uff0c\u4f46\u662f\u7528android.jar\u91cc\u7684\u6e90\u7801\u4e00\u5bf9\u6bd4\uff0c\u600e\u4e48\u4e5f\u5bf9\u4e0d\u4e0a\u3002\nhttp:\/\/www.apkbus.com\/thread-567645-1-1.html<\/a>\n\u539f\u6765android\u6e90\u7801\u91cc\u7684JDK\u548cJava\u7684JDK\u4e0d\u662f\u4e00\u4e2a\u4e1c\u897f\u3002<\/p>\n<\/span>HashMap\u7684\u7279\u6027<\/span><\/h1>\n\n\u7ebf\u7a0b\u4e0d\u5b89\u5168<\/li>\n\u67e5\u8be2\u5feb<\/li>\n<\/ul>\n<\/span>\u5404\u4e2a\u7248\u672c\u7684HashMap\u7684\u533a\u522b<\/span><\/h1>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\nhttps:\/\/www.2cto.com\/kf\/201707\/654203.html<\/a><\/p>\nhttps:\/\/blog.csdn.net\/qq_36520235\/article\/details\/82417949<\/a><\/p>\n<\/span>JDK1.8\u7684HashMap\u5b9e\u73b0<\/span><\/h1>\nhttps:\/\/www.cnblogs.com\/little-fly\/p\/7344285.html<\/a><\/p>\nhttps:\/\/blog.csdn.net\/qq_22200097\/article\/details\/82791479<\/a><\/p>\n<\/span>JDK1.7\u53ca\u4ee5\u4e0b\u7684HashMap\u5b9e\u73b0<\/span><\/h1>\n\nHashMap\u7684\u4e3b\u5e72\u662f\u6570\u7ec4(\u4e0d\u8981\u4ee5\u4e3a\u5e26\u4e2aHash\u5c31\u548cHashTable\u626f\u4e0a\u5173\u7cfb\u4e86)\uff0c\u6570\u7ec4\u7684\u5143\u7d20\u662fHashMapEntry<\/li>\nHashMapEntry\u662f\u4e00\u4e2a\u94fe\u8868\u7ed3\u6784<\/li>\n<\/ul>\nhttps:\/\/blog.csdn.net\/qq_38455201\/article\/details\/80732839<\/a><\/p>\nhttps:\/\/blog.csdn.net\/C18298182575\/article\/details\/87167323<\/a><\/p>\n<\/span>JDK1.5\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u4e3b\u5e72\u6570\u7ec4\u521d\u59cb\u5316<\/span><\/h2>\n \/**\n * Min capacity (other than zero) for a HashMap. Must be a power of two\n * greater than 1 (and less than 1 << 30).\n *\/\n private static final int MINIMUM_CAPACITY = 4;\n\n \/**\n * An empty table shared by all zero-capacity maps (typically from default\n * constructor). It is never written to, and replaced on first put. Its size\n * is set to half the minimum, so that the first resize will create a\n * minimum-sized table.\n *\/\n private static final Entry[] EMPTY_TABLE\n = new HashMapEntry[MINIMUM_CAPACITY >>> 1];\n\n \/**\n * Constructs a new empty {@code HashMap} instance.\n *\/\n @SuppressWarnings("unchecked")\n public HashMap() {\n table = (HashMapEntry<K, V>[]) EMPTY_TABLE;\n threshold = -1; \/\/ Forces first put invocation to replace EMPTY_TABLE\n }<\/code><\/pre>\n\u53ef\u89c1\uff0cHashMap\u7684\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\u9ed8\u8ba4\u4f1a\u521b\u5efa\u4e00\u4e2a\u5927\u5c0f\u4e3a2\u7684\u6570\u7ec4\u3002\n...\u7248\u672c\u592a\u65e7\uff0c\u5c31\u4e0d\u5f80\u4e0b\u5206\u6790\u4e86\u3002<\/p>\n<\/span>JDK1.6\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/blog.csdn.net\/rocksteadypro\/article\/details\/80082822<\/a><\/p>\n<\/span>JDK1.7\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/www.cnblogs.com\/xiaolovewei\/p\/7993521.html<\/a><\/p>\nhttps:\/\/www.cnblogs.com\/xiaozhongfeixiang\/archive\/2019\/09\/23\/11548563.html<\/a><\/p>\n\u9700\u8981\u6ce8\u610f\u7684\u70b9\uff1a<\/p>\n\n\n<\/span>key\u662f\u5982\u4f55\u8ba1\u7b97\u51fa\u6570\u7ec4\u7684\u4e0b\u6807\u7684<\/span><\/h2>\n\n\u54c8\u5e0c\u503c\u6c42\u6570\u7ec4\u4e0b\u6807<\/p>\nhash & (tab.length - 1);<\/code><\/pre>\n\u6269\u5bb9\u4e3a\u5565\u662f2\u7684\u500d\u6570\uff0c\u548c\u4e0a\u9762\u8fd9\u4e2a\u516c\u5f0f\u4e5f\u662f\u76f8\u5173\u7684\uff1ahttps:\/\/blog.csdn.net\/ptsx0607\/article\/details\/68945883<\/a>,\u4fdd\u8bc1\u4e86\u6563\u5217\u7684\u5747\u5300\u6027,\u54c8\u5e0c\u78b0\u649e\u7684\u673a\u7387\u5c31\u4f1a\u51cf\u5c0f\u3002<\/p>\n<\/li>\n\n<\/span>\u5934\u63d2\u6cd5\u4e0e\u94fe\u8868<\/span><\/h2>\nhttps:\/\/blog.csdn.net\/insomsia\/article\/details\/88367436<\/a>\n\u770bput\u65b9\u6cd5\uff1a<\/p>\n @Override public V put(K key, V value) {\n if (key == null) {\n return putValueForNullKey(value);\n }\n\n int hash = secondaryHash(key);\n HashMapEntry[] tab = table;\n int index = hash & (tab.length - 1);\n for (HashMapEntry e = tab[index]; e != null; e = e.next) {\n if (e.hash == hash && key.equals(e.key)) { \n preModify(e);\n V oldValue = e.value;\n e.value = value;\n return oldValue;\n }\n }\n\n \/\/ No entry for (non-null) key is present; create one\n modCount++;\n if (size++ > threshold) {\n tab = doubleCapacity();\n index = hash & (tab.length - 1);\n }\n addNewEntry(key, value, hash, index);\n return null;\n}\n<\/code><\/pre>\n\u91cd\u590d\u5143\u7d20\u5224\u65ad:hash\u76f8\u540c\uff0ckey\u76f8\u540c\u7684\u80af\u5b9a\u662f\u540c\u4e00\u4e2a\u5143\u7d20\u3002<\/strong><\/p>\ne.hash == hash && key.equals(e.key)<\/code><\/pre>\n\u4f46\u662f\u53ef\u80fd\u4e0d\u540c\u7684\u5143\u7d20hash\u503c\u4e0d\u4e00\u6837\uff0c\u7b97\u51fa\u7684index\u5374\u4e00\u6837\uff0c\u4f46\u662f\u53c8\u4e0d\u662f\u540c\u4e00\u4e2a\u5143\u7d20(\u8fd9\u5c31\u662f\u54c8\u5e0c\u78b0\u649e\u95ee\u9898\uff0c\u54c8\u5e0c\u7b97\u6cd5\u65e0\u6cd5\u9003\u907f\u8fd9\u4e2a\u95ee\u9898<\/strong>)\uff0c\u6570\u7ec4\u4e2d\u7684\u8fd9\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u5df2\u7ecf\u88ab\u5360\u636e\u4e86\uff0c\u90a3\u4e48\u6211\u600e\u4e48\u5b58\u50a8\u8fd9\u4e2a\u65b0\u7684\u5143\u7d20\u5462\uff1f\n\u8bf7\u770bHashMapEntry\u8fd9\u4e2a\u7c7b\uff1a\n\n\u518d\u770b\u6dfb\u52a0HashMapEntry\u7684\u65b9\u6cd5\uff1a<\/p>\nvoid addNewEntry(K key, V value, int hash, int index) {\n table[index] = new HashMapEntry(key, value, hash, table[index]);\n}\n\nHashMapEntry(K key, V value, int hash, HashMapEntry next) {\n this.key = key;\n this.value = value;\n this.hash = hash;\n this.next = next;\n }<\/code><\/pre>\n\n\u5bf9\u4e8eaddNewEntry\u65b9\u6cd5\n\u5982\u679cindex\u5904\u672c\u8eab\u6ca1\u6709\u5143\u7d20\u5360\u636e\uff0c\u6b64\u65f6table[index]\u5c31\u662fnull\u3002\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662fnull\uff1b<\/p>\n\u5982\u679cindex\u5904\u672c\u8eab\u6709\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u4e86\uff0c\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u7684\u5143\u7d20\u3002\u5934\u63d2\u6cd5\u5c31\u662f\u8fd9\u4e48\u6765\u7684\u3002<\/p>\nkey\u4e3anull\uff0cHashMap\u662f\u5355\u72ec\u7528\u4e00\u4e2aHashMapEntry\u53d8\u91cf\u6765\u5b58\u50a8\u7684\uff0c\u5e76\u4e0d\u662f\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\u6240\u6709\u7684\u589e\u5220\u6539\u67e5\n\u90fd\u662f\u5148\u5224\u65ad\u7684key\u662f\u5426\u4e3anull\u3002<\/p>\n<\/blockquote>\n\u5bf9\u4e8e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u4eba\u6765\u8bf4\uff0c\u5f97\u51fa\u4e0a\u9762\u7684\u7ed3\u8bba\u53ef\u80fd\u4e0d\u96be\u3002\u4f46\u662f\u5bf9\u4e8e\u975e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u6211\u6765\u8bf4\uff0c\u6162\u6162\u7684\u53d1\u73b0\u4e86\u6570\u636e\u7ed3\u6784\u4e4b\u7c7b\uff0c\u7b80\u76f4\u592a\u7f8e\u5999\u4e86\uff01<\/p>\n<\/li>\n\n\u54c8\u5e0c\u51b2\u7a81\nhttps:\/\/www.iteye.com\/blog\/xiaolu123456-1485349<\/a>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\n<\/li>\n\n\u5e76\u53d1\u5bfc\u81f4\u7684\u6b7b\u5faa\u73af\u95ee\u9898\nhttps:\/\/blog.csdn.net\/pange1991\/article\/details\/82377980<\/a>\nhttps:\/\/www.jianshu.com\/p\/61a829fa4e49<\/a><\/p>\n<\/li>\n<\/ul>\n<\/span>JDK1.8\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u77e5\u8bc6\u70b9\u9884\u5907-\u7ea2\u9ed1\u6811<\/a><\/span><\/h2>\nhttps:\/\/blog.csdn.net\/u010890358\/article\/details\/80496144<\/a> \uff08\u8be6\u7ec6\u89e3\u91ca\u6bcf\u884c\u4ee3\u7801\uff09<\/p>\nhttps:\/\/www.jianshu.com\/p\/400f3c019557<\/a><\/p>\n\u6536\u85cf <\/i><\/button>","protected":false},"excerpt":{"rendered":"\u4e0d\u540c\u7248\u672c\u7684JDK\u7684HashMap\u7684\u5e95\u5c42\u5b9e\u73b0\u5747\u6709\u6240\u4e0d\u540c \u76ee\u5f55 JDK\u5404\u4e2a\u7248\u672c\u7684\u6e90\u7801\u67e5\u770bHashMap\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[597],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7993"}],"version-history":[{"count":4,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions"}],"predecessor-version":[{"id":8000,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions\/8000"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7993"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n\u7ecf\u6211\u6d4b\u8bd5\uff0c\u771f\u6b63\u7684\u60c5\u51b5\u662fAPI19\u300120\u90fd\u662fJDK1.5\uff0c\u7136\u540e\u5230\u4e86API21\u76f4\u63a5\u5c31JDK1.7\u4e86\uff0c\u6ca1\u6709\u7528\u5230JDK1.6\u3002<\/p>\n
\u5927\u5751\uff1a<\/strong>\n\u770b\u4e86\u5f88\u591a\u7684\u535a\u5ba2\uff0c\u4f46\u662f\u7528android.jar\u91cc\u7684\u6e90\u7801\u4e00\u5bf9\u6bd4\uff0c\u600e\u4e48\u4e5f\u5bf9\u4e0d\u4e0a\u3002\nhttp:\/\/www.apkbus.com\/thread-567645-1-1.html<\/a>\n\u539f\u6765android\u6e90\u7801\u91cc\u7684JDK\u548cJava\u7684JDK\u4e0d\u662f\u4e00\u4e2a\u4e1c\u897f\u3002<\/p>\n<\/span>HashMap\u7684\u7279\u6027<\/span><\/h1>\n\n\u7ebf\u7a0b\u4e0d\u5b89\u5168<\/li>\n\u67e5\u8be2\u5feb<\/li>\n<\/ul>\n<\/span>\u5404\u4e2a\u7248\u672c\u7684HashMap\u7684\u533a\u522b<\/span><\/h1>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\nhttps:\/\/www.2cto.com\/kf\/201707\/654203.html<\/a><\/p>\nhttps:\/\/blog.csdn.net\/qq_36520235\/article\/details\/82417949<\/a><\/p>\n<\/span>JDK1.8\u7684HashMap\u5b9e\u73b0<\/span><\/h1>\nhttps:\/\/www.cnblogs.com\/little-fly\/p\/7344285.html<\/a><\/p>\nhttps:\/\/blog.csdn.net\/qq_22200097\/article\/details\/82791479<\/a><\/p>\n<\/span>JDK1.7\u53ca\u4ee5\u4e0b\u7684HashMap\u5b9e\u73b0<\/span><\/h1>\n\nHashMap\u7684\u4e3b\u5e72\u662f\u6570\u7ec4(\u4e0d\u8981\u4ee5\u4e3a\u5e26\u4e2aHash\u5c31\u548cHashTable\u626f\u4e0a\u5173\u7cfb\u4e86)\uff0c\u6570\u7ec4\u7684\u5143\u7d20\u662fHashMapEntry<\/li>\nHashMapEntry\u662f\u4e00\u4e2a\u94fe\u8868\u7ed3\u6784<\/li>\n<\/ul>\nhttps:\/\/blog.csdn.net\/qq_38455201\/article\/details\/80732839<\/a><\/p>\nhttps:\/\/blog.csdn.net\/C18298182575\/article\/details\/87167323<\/a><\/p>\n<\/span>JDK1.5\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u4e3b\u5e72\u6570\u7ec4\u521d\u59cb\u5316<\/span><\/h2>\n \/**\n * Min capacity (other than zero) for a HashMap. Must be a power of two\n * greater than 1 (and less than 1 << 30).\n *\/\n private static final int MINIMUM_CAPACITY = 4;\n\n \/**\n * An empty table shared by all zero-capacity maps (typically from default\n * constructor). It is never written to, and replaced on first put. Its size\n * is set to half the minimum, so that the first resize will create a\n * minimum-sized table.\n *\/\n private static final Entry[] EMPTY_TABLE\n = new HashMapEntry[MINIMUM_CAPACITY >>> 1];\n\n \/**\n * Constructs a new empty {@code HashMap} instance.\n *\/\n @SuppressWarnings("unchecked")\n public HashMap() {\n table = (HashMapEntry<K, V>[]) EMPTY_TABLE;\n threshold = -1; \/\/ Forces first put invocation to replace EMPTY_TABLE\n }<\/code><\/pre>\n\u53ef\u89c1\uff0cHashMap\u7684\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\u9ed8\u8ba4\u4f1a\u521b\u5efa\u4e00\u4e2a\u5927\u5c0f\u4e3a2\u7684\u6570\u7ec4\u3002\n...\u7248\u672c\u592a\u65e7\uff0c\u5c31\u4e0d\u5f80\u4e0b\u5206\u6790\u4e86\u3002<\/p>\n<\/span>JDK1.6\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/blog.csdn.net\/rocksteadypro\/article\/details\/80082822<\/a><\/p>\n<\/span>JDK1.7\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/www.cnblogs.com\/xiaolovewei\/p\/7993521.html<\/a><\/p>\nhttps:\/\/www.cnblogs.com\/xiaozhongfeixiang\/archive\/2019\/09\/23\/11548563.html<\/a><\/p>\n\u9700\u8981\u6ce8\u610f\u7684\u70b9\uff1a<\/p>\n\n\n<\/span>key\u662f\u5982\u4f55\u8ba1\u7b97\u51fa\u6570\u7ec4\u7684\u4e0b\u6807\u7684<\/span><\/h2>\n\n\u54c8\u5e0c\u503c\u6c42\u6570\u7ec4\u4e0b\u6807<\/p>\nhash & (tab.length - 1);<\/code><\/pre>\n\u6269\u5bb9\u4e3a\u5565\u662f2\u7684\u500d\u6570\uff0c\u548c\u4e0a\u9762\u8fd9\u4e2a\u516c\u5f0f\u4e5f\u662f\u76f8\u5173\u7684\uff1ahttps:\/\/blog.csdn.net\/ptsx0607\/article\/details\/68945883<\/a>,\u4fdd\u8bc1\u4e86\u6563\u5217\u7684\u5747\u5300\u6027,\u54c8\u5e0c\u78b0\u649e\u7684\u673a\u7387\u5c31\u4f1a\u51cf\u5c0f\u3002<\/p>\n<\/li>\n\n<\/span>\u5934\u63d2\u6cd5\u4e0e\u94fe\u8868<\/span><\/h2>\nhttps:\/\/blog.csdn.net\/insomsia\/article\/details\/88367436<\/a>\n\u770bput\u65b9\u6cd5\uff1a<\/p>\n @Override public V put(K key, V value) {\n if (key == null) {\n return putValueForNullKey(value);\n }\n\n int hash = secondaryHash(key);\n HashMapEntry[] tab = table;\n int index = hash & (tab.length - 1);\n for (HashMapEntry e = tab[index]; e != null; e = e.next) {\n if (e.hash == hash && key.equals(e.key)) { \n preModify(e);\n V oldValue = e.value;\n e.value = value;\n return oldValue;\n }\n }\n\n \/\/ No entry for (non-null) key is present; create one\n modCount++;\n if (size++ > threshold) {\n tab = doubleCapacity();\n index = hash & (tab.length - 1);\n }\n addNewEntry(key, value, hash, index);\n return null;\n}\n<\/code><\/pre>\n\u91cd\u590d\u5143\u7d20\u5224\u65ad:hash\u76f8\u540c\uff0ckey\u76f8\u540c\u7684\u80af\u5b9a\u662f\u540c\u4e00\u4e2a\u5143\u7d20\u3002<\/strong><\/p>\ne.hash == hash && key.equals(e.key)<\/code><\/pre>\n\u4f46\u662f\u53ef\u80fd\u4e0d\u540c\u7684\u5143\u7d20hash\u503c\u4e0d\u4e00\u6837\uff0c\u7b97\u51fa\u7684index\u5374\u4e00\u6837\uff0c\u4f46\u662f\u53c8\u4e0d\u662f\u540c\u4e00\u4e2a\u5143\u7d20(\u8fd9\u5c31\u662f\u54c8\u5e0c\u78b0\u649e\u95ee\u9898\uff0c\u54c8\u5e0c\u7b97\u6cd5\u65e0\u6cd5\u9003\u907f\u8fd9\u4e2a\u95ee\u9898<\/strong>)\uff0c\u6570\u7ec4\u4e2d\u7684\u8fd9\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u5df2\u7ecf\u88ab\u5360\u636e\u4e86\uff0c\u90a3\u4e48\u6211\u600e\u4e48\u5b58\u50a8\u8fd9\u4e2a\u65b0\u7684\u5143\u7d20\u5462\uff1f\n\u8bf7\u770bHashMapEntry\u8fd9\u4e2a\u7c7b\uff1a\n\n\u518d\u770b\u6dfb\u52a0HashMapEntry\u7684\u65b9\u6cd5\uff1a<\/p>\nvoid addNewEntry(K key, V value, int hash, int index) {\n table[index] = new HashMapEntry(key, value, hash, table[index]);\n}\n\nHashMapEntry(K key, V value, int hash, HashMapEntry next) {\n this.key = key;\n this.value = value;\n this.hash = hash;\n this.next = next;\n }<\/code><\/pre>\n\n\u5bf9\u4e8eaddNewEntry\u65b9\u6cd5\n\u5982\u679cindex\u5904\u672c\u8eab\u6ca1\u6709\u5143\u7d20\u5360\u636e\uff0c\u6b64\u65f6table[index]\u5c31\u662fnull\u3002\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662fnull\uff1b<\/p>\n\u5982\u679cindex\u5904\u672c\u8eab\u6709\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u4e86\uff0c\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u7684\u5143\u7d20\u3002\u5934\u63d2\u6cd5\u5c31\u662f\u8fd9\u4e48\u6765\u7684\u3002<\/p>\nkey\u4e3anull\uff0cHashMap\u662f\u5355\u72ec\u7528\u4e00\u4e2aHashMapEntry\u53d8\u91cf\u6765\u5b58\u50a8\u7684\uff0c\u5e76\u4e0d\u662f\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\u6240\u6709\u7684\u589e\u5220\u6539\u67e5\n\u90fd\u662f\u5148\u5224\u65ad\u7684key\u662f\u5426\u4e3anull\u3002<\/p>\n<\/blockquote>\n\u5bf9\u4e8e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u4eba\u6765\u8bf4\uff0c\u5f97\u51fa\u4e0a\u9762\u7684\u7ed3\u8bba\u53ef\u80fd\u4e0d\u96be\u3002\u4f46\u662f\u5bf9\u4e8e\u975e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u6211\u6765\u8bf4\uff0c\u6162\u6162\u7684\u53d1\u73b0\u4e86\u6570\u636e\u7ed3\u6784\u4e4b\u7c7b\uff0c\u7b80\u76f4\u592a\u7f8e\u5999\u4e86\uff01<\/p>\n<\/li>\n\n\u54c8\u5e0c\u51b2\u7a81\nhttps:\/\/www.iteye.com\/blog\/xiaolu123456-1485349<\/a>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\n<\/li>\n\n\u5e76\u53d1\u5bfc\u81f4\u7684\u6b7b\u5faa\u73af\u95ee\u9898\nhttps:\/\/blog.csdn.net\/pange1991\/article\/details\/82377980<\/a>\nhttps:\/\/www.jianshu.com\/p\/61a829fa4e49<\/a><\/p>\n<\/li>\n<\/ul>\n<\/span>JDK1.8\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u77e5\u8bc6\u70b9\u9884\u5907-\u7ea2\u9ed1\u6811<\/a><\/span><\/h2>\nhttps:\/\/blog.csdn.net\/u010890358\/article\/details\/80496144<\/a> \uff08\u8be6\u7ec6\u89e3\u91ca\u6bcf\u884c\u4ee3\u7801\uff09<\/p>\nhttps:\/\/www.jianshu.com\/p\/400f3c019557<\/a><\/p>\n\u6536\u85cf <\/i><\/button>","protected":false},"excerpt":{"rendered":"\u4e0d\u540c\u7248\u672c\u7684JDK\u7684HashMap\u7684\u5e95\u5c42\u5b9e\u73b0\u5747\u6709\u6240\u4e0d\u540c \u76ee\u5f55 JDK\u5404\u4e2a\u7248\u672c\u7684\u6e90\u7801\u67e5\u770bHashMap\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[597],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7993"}],"version-history":[{"count":4,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions"}],"predecessor-version":[{"id":8000,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions\/8000"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7993"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
https:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\nhttps:\/\/www.2cto.com\/kf\/201707\/654203.html<\/a><\/p>\nhttps:\/\/blog.csdn.net\/qq_36520235\/article\/details\/82417949<\/a><\/p>\n<\/span>JDK1.8\u7684HashMap\u5b9e\u73b0<\/span><\/h1>\nhttps:\/\/www.cnblogs.com\/little-fly\/p\/7344285.html<\/a><\/p>\nhttps:\/\/blog.csdn.net\/qq_22200097\/article\/details\/82791479<\/a><\/p>\n<\/span>JDK1.7\u53ca\u4ee5\u4e0b\u7684HashMap\u5b9e\u73b0<\/span><\/h1>\n\nHashMap\u7684\u4e3b\u5e72\u662f\u6570\u7ec4(\u4e0d\u8981\u4ee5\u4e3a\u5e26\u4e2aHash\u5c31\u548cHashTable\u626f\u4e0a\u5173\u7cfb\u4e86)\uff0c\u6570\u7ec4\u7684\u5143\u7d20\u662fHashMapEntry<\/li>\nHashMapEntry\u662f\u4e00\u4e2a\u94fe\u8868\u7ed3\u6784<\/li>\n<\/ul>\nhttps:\/\/blog.csdn.net\/qq_38455201\/article\/details\/80732839<\/a><\/p>\nhttps:\/\/blog.csdn.net\/C18298182575\/article\/details\/87167323<\/a><\/p>\n<\/span>JDK1.5\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u4e3b\u5e72\u6570\u7ec4\u521d\u59cb\u5316<\/span><\/h2>\n \/**\n * Min capacity (other than zero) for a HashMap. Must be a power of two\n * greater than 1 (and less than 1 << 30).\n *\/\n private static final int MINIMUM_CAPACITY = 4;\n\n \/**\n * An empty table shared by all zero-capacity maps (typically from default\n * constructor). It is never written to, and replaced on first put. Its size\n * is set to half the minimum, so that the first resize will create a\n * minimum-sized table.\n *\/\n private static final Entry[] EMPTY_TABLE\n = new HashMapEntry[MINIMUM_CAPACITY >>> 1];\n\n \/**\n * Constructs a new empty {@code HashMap} instance.\n *\/\n @SuppressWarnings("unchecked")\n public HashMap() {\n table = (HashMapEntry<K, V>[]) EMPTY_TABLE;\n threshold = -1; \/\/ Forces first put invocation to replace EMPTY_TABLE\n }<\/code><\/pre>\n\u53ef\u89c1\uff0cHashMap\u7684\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\u9ed8\u8ba4\u4f1a\u521b\u5efa\u4e00\u4e2a\u5927\u5c0f\u4e3a2\u7684\u6570\u7ec4\u3002\n...\u7248\u672c\u592a\u65e7\uff0c\u5c31\u4e0d\u5f80\u4e0b\u5206\u6790\u4e86\u3002<\/p>\n<\/span>JDK1.6\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/blog.csdn.net\/rocksteadypro\/article\/details\/80082822<\/a><\/p>\n<\/span>JDK1.7\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/www.cnblogs.com\/xiaolovewei\/p\/7993521.html<\/a><\/p>\nhttps:\/\/www.cnblogs.com\/xiaozhongfeixiang\/archive\/2019\/09\/23\/11548563.html<\/a><\/p>\n\u9700\u8981\u6ce8\u610f\u7684\u70b9\uff1a<\/p>\n\n\n<\/span>key\u662f\u5982\u4f55\u8ba1\u7b97\u51fa\u6570\u7ec4\u7684\u4e0b\u6807\u7684<\/span><\/h2>\n\n\u54c8\u5e0c\u503c\u6c42\u6570\u7ec4\u4e0b\u6807<\/p>\nhash & (tab.length - 1);<\/code><\/pre>\n\u6269\u5bb9\u4e3a\u5565\u662f2\u7684\u500d\u6570\uff0c\u548c\u4e0a\u9762\u8fd9\u4e2a\u516c\u5f0f\u4e5f\u662f\u76f8\u5173\u7684\uff1ahttps:\/\/blog.csdn.net\/ptsx0607\/article\/details\/68945883<\/a>,\u4fdd\u8bc1\u4e86\u6563\u5217\u7684\u5747\u5300\u6027,\u54c8\u5e0c\u78b0\u649e\u7684\u673a\u7387\u5c31\u4f1a\u51cf\u5c0f\u3002<\/p>\n<\/li>\n\n<\/span>\u5934\u63d2\u6cd5\u4e0e\u94fe\u8868<\/span><\/h2>\nhttps:\/\/blog.csdn.net\/insomsia\/article\/details\/88367436<\/a>\n\u770bput\u65b9\u6cd5\uff1a<\/p>\n @Override public V put(K key, V value) {\n if (key == null) {\n return putValueForNullKey(value);\n }\n\n int hash = secondaryHash(key);\n HashMapEntry[] tab = table;\n int index = hash & (tab.length - 1);\n for (HashMapEntry e = tab[index]; e != null; e = e.next) {\n if (e.hash == hash && key.equals(e.key)) { \n preModify(e);\n V oldValue = e.value;\n e.value = value;\n return oldValue;\n }\n }\n\n \/\/ No entry for (non-null) key is present; create one\n modCount++;\n if (size++ > threshold) {\n tab = doubleCapacity();\n index = hash & (tab.length - 1);\n }\n addNewEntry(key, value, hash, index);\n return null;\n}\n<\/code><\/pre>\n\u91cd\u590d\u5143\u7d20\u5224\u65ad:hash\u76f8\u540c\uff0ckey\u76f8\u540c\u7684\u80af\u5b9a\u662f\u540c\u4e00\u4e2a\u5143\u7d20\u3002<\/strong><\/p>\ne.hash == hash && key.equals(e.key)<\/code><\/pre>\n\u4f46\u662f\u53ef\u80fd\u4e0d\u540c\u7684\u5143\u7d20hash\u503c\u4e0d\u4e00\u6837\uff0c\u7b97\u51fa\u7684index\u5374\u4e00\u6837\uff0c\u4f46\u662f\u53c8\u4e0d\u662f\u540c\u4e00\u4e2a\u5143\u7d20(\u8fd9\u5c31\u662f\u54c8\u5e0c\u78b0\u649e\u95ee\u9898\uff0c\u54c8\u5e0c\u7b97\u6cd5\u65e0\u6cd5\u9003\u907f\u8fd9\u4e2a\u95ee\u9898<\/strong>)\uff0c\u6570\u7ec4\u4e2d\u7684\u8fd9\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u5df2\u7ecf\u88ab\u5360\u636e\u4e86\uff0c\u90a3\u4e48\u6211\u600e\u4e48\u5b58\u50a8\u8fd9\u4e2a\u65b0\u7684\u5143\u7d20\u5462\uff1f\n\u8bf7\u770bHashMapEntry\u8fd9\u4e2a\u7c7b\uff1a\n\n\u518d\u770b\u6dfb\u52a0HashMapEntry\u7684\u65b9\u6cd5\uff1a<\/p>\nvoid addNewEntry(K key, V value, int hash, int index) {\n table[index] = new HashMapEntry(key, value, hash, table[index]);\n}\n\nHashMapEntry(K key, V value, int hash, HashMapEntry next) {\n this.key = key;\n this.value = value;\n this.hash = hash;\n this.next = next;\n }<\/code><\/pre>\n\n\u5bf9\u4e8eaddNewEntry\u65b9\u6cd5\n\u5982\u679cindex\u5904\u672c\u8eab\u6ca1\u6709\u5143\u7d20\u5360\u636e\uff0c\u6b64\u65f6table[index]\u5c31\u662fnull\u3002\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662fnull\uff1b<\/p>\n\u5982\u679cindex\u5904\u672c\u8eab\u6709\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u4e86\uff0c\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u7684\u5143\u7d20\u3002\u5934\u63d2\u6cd5\u5c31\u662f\u8fd9\u4e48\u6765\u7684\u3002<\/p>\nkey\u4e3anull\uff0cHashMap\u662f\u5355\u72ec\u7528\u4e00\u4e2aHashMapEntry\u53d8\u91cf\u6765\u5b58\u50a8\u7684\uff0c\u5e76\u4e0d\u662f\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\u6240\u6709\u7684\u589e\u5220\u6539\u67e5\n\u90fd\u662f\u5148\u5224\u65ad\u7684key\u662f\u5426\u4e3anull\u3002<\/p>\n<\/blockquote>\n\u5bf9\u4e8e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u4eba\u6765\u8bf4\uff0c\u5f97\u51fa\u4e0a\u9762\u7684\u7ed3\u8bba\u53ef\u80fd\u4e0d\u96be\u3002\u4f46\u662f\u5bf9\u4e8e\u975e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u6211\u6765\u8bf4\uff0c\u6162\u6162\u7684\u53d1\u73b0\u4e86\u6570\u636e\u7ed3\u6784\u4e4b\u7c7b\uff0c\u7b80\u76f4\u592a\u7f8e\u5999\u4e86\uff01<\/p>\n<\/li>\n\n\u54c8\u5e0c\u51b2\u7a81\nhttps:\/\/www.iteye.com\/blog\/xiaolu123456-1485349<\/a>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\n<\/li>\n\n\u5e76\u53d1\u5bfc\u81f4\u7684\u6b7b\u5faa\u73af\u95ee\u9898\nhttps:\/\/blog.csdn.net\/pange1991\/article\/details\/82377980<\/a>\nhttps:\/\/www.jianshu.com\/p\/61a829fa4e49<\/a><\/p>\n<\/li>\n<\/ul>\n<\/span>JDK1.8\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u77e5\u8bc6\u70b9\u9884\u5907-\u7ea2\u9ed1\u6811<\/a><\/span><\/h2>\nhttps:\/\/blog.csdn.net\/u010890358\/article\/details\/80496144<\/a> \uff08\u8be6\u7ec6\u89e3\u91ca\u6bcf\u884c\u4ee3\u7801\uff09<\/p>\nhttps:\/\/www.jianshu.com\/p\/400f3c019557<\/a><\/p>\n\u6536\u85cf <\/i><\/button>","protected":false},"excerpt":{"rendered":"\u4e0d\u540c\u7248\u672c\u7684JDK\u7684HashMap\u7684\u5e95\u5c42\u5b9e\u73b0\u5747\u6709\u6240\u4e0d\u540c \u76ee\u5f55 JDK\u5404\u4e2a\u7248\u672c\u7684\u6e90\u7801\u67e5\u770bHashMap\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[597],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7993"}],"version-history":[{"count":4,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions"}],"predecessor-version":[{"id":8000,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions\/8000"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7993"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
https:\/\/www.2cto.com\/kf\/201707\/654203.html<\/a><\/p>\nhttps:\/\/blog.csdn.net\/qq_36520235\/article\/details\/82417949<\/a><\/p>\n<\/span>JDK1.8\u7684HashMap\u5b9e\u73b0<\/span><\/h1>\nhttps:\/\/www.cnblogs.com\/little-fly\/p\/7344285.html<\/a><\/p>\nhttps:\/\/blog.csdn.net\/qq_22200097\/article\/details\/82791479<\/a><\/p>\n<\/span>JDK1.7\u53ca\u4ee5\u4e0b\u7684HashMap\u5b9e\u73b0<\/span><\/h1>\n\nHashMap\u7684\u4e3b\u5e72\u662f\u6570\u7ec4(\u4e0d\u8981\u4ee5\u4e3a\u5e26\u4e2aHash\u5c31\u548cHashTable\u626f\u4e0a\u5173\u7cfb\u4e86)\uff0c\u6570\u7ec4\u7684\u5143\u7d20\u662fHashMapEntry<\/li>\nHashMapEntry\u662f\u4e00\u4e2a\u94fe\u8868\u7ed3\u6784<\/li>\n<\/ul>\nhttps:\/\/blog.csdn.net\/qq_38455201\/article\/details\/80732839<\/a><\/p>\nhttps:\/\/blog.csdn.net\/C18298182575\/article\/details\/87167323<\/a><\/p>\n<\/span>JDK1.5\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u4e3b\u5e72\u6570\u7ec4\u521d\u59cb\u5316<\/span><\/h2>\n \/**\n * Min capacity (other than zero) for a HashMap. Must be a power of two\n * greater than 1 (and less than 1 << 30).\n *\/\n private static final int MINIMUM_CAPACITY = 4;\n\n \/**\n * An empty table shared by all zero-capacity maps (typically from default\n * constructor). It is never written to, and replaced on first put. Its size\n * is set to half the minimum, so that the first resize will create a\n * minimum-sized table.\n *\/\n private static final Entry[] EMPTY_TABLE\n = new HashMapEntry[MINIMUM_CAPACITY >>> 1];\n\n \/**\n * Constructs a new empty {@code HashMap} instance.\n *\/\n @SuppressWarnings("unchecked")\n public HashMap() {\n table = (HashMapEntry<K, V>[]) EMPTY_TABLE;\n threshold = -1; \/\/ Forces first put invocation to replace EMPTY_TABLE\n }<\/code><\/pre>\n\u53ef\u89c1\uff0cHashMap\u7684\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\u9ed8\u8ba4\u4f1a\u521b\u5efa\u4e00\u4e2a\u5927\u5c0f\u4e3a2\u7684\u6570\u7ec4\u3002\n...\u7248\u672c\u592a\u65e7\uff0c\u5c31\u4e0d\u5f80\u4e0b\u5206\u6790\u4e86\u3002<\/p>\n<\/span>JDK1.6\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/blog.csdn.net\/rocksteadypro\/article\/details\/80082822<\/a><\/p>\n<\/span>JDK1.7\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/www.cnblogs.com\/xiaolovewei\/p\/7993521.html<\/a><\/p>\nhttps:\/\/www.cnblogs.com\/xiaozhongfeixiang\/archive\/2019\/09\/23\/11548563.html<\/a><\/p>\n\u9700\u8981\u6ce8\u610f\u7684\u70b9\uff1a<\/p>\n\n\n<\/span>key\u662f\u5982\u4f55\u8ba1\u7b97\u51fa\u6570\u7ec4\u7684\u4e0b\u6807\u7684<\/span><\/h2>\n\n\u54c8\u5e0c\u503c\u6c42\u6570\u7ec4\u4e0b\u6807<\/p>\nhash & (tab.length - 1);<\/code><\/pre>\n\u6269\u5bb9\u4e3a\u5565\u662f2\u7684\u500d\u6570\uff0c\u548c\u4e0a\u9762\u8fd9\u4e2a\u516c\u5f0f\u4e5f\u662f\u76f8\u5173\u7684\uff1ahttps:\/\/blog.csdn.net\/ptsx0607\/article\/details\/68945883<\/a>,\u4fdd\u8bc1\u4e86\u6563\u5217\u7684\u5747\u5300\u6027,\u54c8\u5e0c\u78b0\u649e\u7684\u673a\u7387\u5c31\u4f1a\u51cf\u5c0f\u3002<\/p>\n<\/li>\n\n<\/span>\u5934\u63d2\u6cd5\u4e0e\u94fe\u8868<\/span><\/h2>\nhttps:\/\/blog.csdn.net\/insomsia\/article\/details\/88367436<\/a>\n\u770bput\u65b9\u6cd5\uff1a<\/p>\n @Override public V put(K key, V value) {\n if (key == null) {\n return putValueForNullKey(value);\n }\n\n int hash = secondaryHash(key);\n HashMapEntry[] tab = table;\n int index = hash & (tab.length - 1);\n for (HashMapEntry e = tab[index]; e != null; e = e.next) {\n if (e.hash == hash && key.equals(e.key)) { \n preModify(e);\n V oldValue = e.value;\n e.value = value;\n return oldValue;\n }\n }\n\n \/\/ No entry for (non-null) key is present; create one\n modCount++;\n if (size++ > threshold) {\n tab = doubleCapacity();\n index = hash & (tab.length - 1);\n }\n addNewEntry(key, value, hash, index);\n return null;\n}\n<\/code><\/pre>\n\u91cd\u590d\u5143\u7d20\u5224\u65ad:hash\u76f8\u540c\uff0ckey\u76f8\u540c\u7684\u80af\u5b9a\u662f\u540c\u4e00\u4e2a\u5143\u7d20\u3002<\/strong><\/p>\ne.hash == hash && key.equals(e.key)<\/code><\/pre>\n\u4f46\u662f\u53ef\u80fd\u4e0d\u540c\u7684\u5143\u7d20hash\u503c\u4e0d\u4e00\u6837\uff0c\u7b97\u51fa\u7684index\u5374\u4e00\u6837\uff0c\u4f46\u662f\u53c8\u4e0d\u662f\u540c\u4e00\u4e2a\u5143\u7d20(\u8fd9\u5c31\u662f\u54c8\u5e0c\u78b0\u649e\u95ee\u9898\uff0c\u54c8\u5e0c\u7b97\u6cd5\u65e0\u6cd5\u9003\u907f\u8fd9\u4e2a\u95ee\u9898<\/strong>)\uff0c\u6570\u7ec4\u4e2d\u7684\u8fd9\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u5df2\u7ecf\u88ab\u5360\u636e\u4e86\uff0c\u90a3\u4e48\u6211\u600e\u4e48\u5b58\u50a8\u8fd9\u4e2a\u65b0\u7684\u5143\u7d20\u5462\uff1f\n\u8bf7\u770bHashMapEntry\u8fd9\u4e2a\u7c7b\uff1a\n\n\u518d\u770b\u6dfb\u52a0HashMapEntry\u7684\u65b9\u6cd5\uff1a<\/p>\nvoid addNewEntry(K key, V value, int hash, int index) {\n table[index] = new HashMapEntry(key, value, hash, table[index]);\n}\n\nHashMapEntry(K key, V value, int hash, HashMapEntry next) {\n this.key = key;\n this.value = value;\n this.hash = hash;\n this.next = next;\n }<\/code><\/pre>\n\n\u5bf9\u4e8eaddNewEntry\u65b9\u6cd5\n\u5982\u679cindex\u5904\u672c\u8eab\u6ca1\u6709\u5143\u7d20\u5360\u636e\uff0c\u6b64\u65f6table[index]\u5c31\u662fnull\u3002\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662fnull\uff1b<\/p>\n\u5982\u679cindex\u5904\u672c\u8eab\u6709\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u4e86\uff0c\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u7684\u5143\u7d20\u3002\u5934\u63d2\u6cd5\u5c31\u662f\u8fd9\u4e48\u6765\u7684\u3002<\/p>\nkey\u4e3anull\uff0cHashMap\u662f\u5355\u72ec\u7528\u4e00\u4e2aHashMapEntry\u53d8\u91cf\u6765\u5b58\u50a8\u7684\uff0c\u5e76\u4e0d\u662f\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\u6240\u6709\u7684\u589e\u5220\u6539\u67e5\n\u90fd\u662f\u5148\u5224\u65ad\u7684key\u662f\u5426\u4e3anull\u3002<\/p>\n<\/blockquote>\n\u5bf9\u4e8e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u4eba\u6765\u8bf4\uff0c\u5f97\u51fa\u4e0a\u9762\u7684\u7ed3\u8bba\u53ef\u80fd\u4e0d\u96be\u3002\u4f46\u662f\u5bf9\u4e8e\u975e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u6211\u6765\u8bf4\uff0c\u6162\u6162\u7684\u53d1\u73b0\u4e86\u6570\u636e\u7ed3\u6784\u4e4b\u7c7b\uff0c\u7b80\u76f4\u592a\u7f8e\u5999\u4e86\uff01<\/p>\n<\/li>\n\n\u54c8\u5e0c\u51b2\u7a81\nhttps:\/\/www.iteye.com\/blog\/xiaolu123456-1485349<\/a>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\n<\/li>\n\n\u5e76\u53d1\u5bfc\u81f4\u7684\u6b7b\u5faa\u73af\u95ee\u9898\nhttps:\/\/blog.csdn.net\/pange1991\/article\/details\/82377980<\/a>\nhttps:\/\/www.jianshu.com\/p\/61a829fa4e49<\/a><\/p>\n<\/li>\n<\/ul>\n<\/span>JDK1.8\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u77e5\u8bc6\u70b9\u9884\u5907-\u7ea2\u9ed1\u6811<\/a><\/span><\/h2>\nhttps:\/\/blog.csdn.net\/u010890358\/article\/details\/80496144<\/a> \uff08\u8be6\u7ec6\u89e3\u91ca\u6bcf\u884c\u4ee3\u7801\uff09<\/p>\nhttps:\/\/www.jianshu.com\/p\/400f3c019557<\/a><\/p>\n\u6536\u85cf <\/i><\/button>","protected":false},"excerpt":{"rendered":"\u4e0d\u540c\u7248\u672c\u7684JDK\u7684HashMap\u7684\u5e95\u5c42\u5b9e\u73b0\u5747\u6709\u6240\u4e0d\u540c \u76ee\u5f55 JDK\u5404\u4e2a\u7248\u672c\u7684\u6e90\u7801\u67e5\u770bHashMap\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[597],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7993"}],"version-history":[{"count":4,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions"}],"predecessor-version":[{"id":8000,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions\/8000"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7993"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
https:\/\/blog.csdn.net\/qq_36520235\/article\/details\/82417949<\/a><\/p>\n<\/span>JDK1.8\u7684HashMap\u5b9e\u73b0<\/span><\/h1>\nhttps:\/\/www.cnblogs.com\/little-fly\/p\/7344285.html<\/a><\/p>\nhttps:\/\/blog.csdn.net\/qq_22200097\/article\/details\/82791479<\/a><\/p>\n<\/span>JDK1.7\u53ca\u4ee5\u4e0b\u7684HashMap\u5b9e\u73b0<\/span><\/h1>\n\nHashMap\u7684\u4e3b\u5e72\u662f\u6570\u7ec4(\u4e0d\u8981\u4ee5\u4e3a\u5e26\u4e2aHash\u5c31\u548cHashTable\u626f\u4e0a\u5173\u7cfb\u4e86)\uff0c\u6570\u7ec4\u7684\u5143\u7d20\u662fHashMapEntry<\/li>\nHashMapEntry\u662f\u4e00\u4e2a\u94fe\u8868\u7ed3\u6784<\/li>\n<\/ul>\nhttps:\/\/blog.csdn.net\/qq_38455201\/article\/details\/80732839<\/a><\/p>\nhttps:\/\/blog.csdn.net\/C18298182575\/article\/details\/87167323<\/a><\/p>\n<\/span>JDK1.5\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u4e3b\u5e72\u6570\u7ec4\u521d\u59cb\u5316<\/span><\/h2>\n \/**\n * Min capacity (other than zero) for a HashMap. Must be a power of two\n * greater than 1 (and less than 1 << 30).\n *\/\n private static final int MINIMUM_CAPACITY = 4;\n\n \/**\n * An empty table shared by all zero-capacity maps (typically from default\n * constructor). It is never written to, and replaced on first put. Its size\n * is set to half the minimum, so that the first resize will create a\n * minimum-sized table.\n *\/\n private static final Entry[] EMPTY_TABLE\n = new HashMapEntry[MINIMUM_CAPACITY >>> 1];\n\n \/**\n * Constructs a new empty {@code HashMap} instance.\n *\/\n @SuppressWarnings("unchecked")\n public HashMap() {\n table = (HashMapEntry<K, V>[]) EMPTY_TABLE;\n threshold = -1; \/\/ Forces first put invocation to replace EMPTY_TABLE\n }<\/code><\/pre>\n\u53ef\u89c1\uff0cHashMap\u7684\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\u9ed8\u8ba4\u4f1a\u521b\u5efa\u4e00\u4e2a\u5927\u5c0f\u4e3a2\u7684\u6570\u7ec4\u3002\n...\u7248\u672c\u592a\u65e7\uff0c\u5c31\u4e0d\u5f80\u4e0b\u5206\u6790\u4e86\u3002<\/p>\n<\/span>JDK1.6\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/blog.csdn.net\/rocksteadypro\/article\/details\/80082822<\/a><\/p>\n<\/span>JDK1.7\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/www.cnblogs.com\/xiaolovewei\/p\/7993521.html<\/a><\/p>\nhttps:\/\/www.cnblogs.com\/xiaozhongfeixiang\/archive\/2019\/09\/23\/11548563.html<\/a><\/p>\n\u9700\u8981\u6ce8\u610f\u7684\u70b9\uff1a<\/p>\n\n\n<\/span>key\u662f\u5982\u4f55\u8ba1\u7b97\u51fa\u6570\u7ec4\u7684\u4e0b\u6807\u7684<\/span><\/h2>\n\n\u54c8\u5e0c\u503c\u6c42\u6570\u7ec4\u4e0b\u6807<\/p>\nhash & (tab.length - 1);<\/code><\/pre>\n\u6269\u5bb9\u4e3a\u5565\u662f2\u7684\u500d\u6570\uff0c\u548c\u4e0a\u9762\u8fd9\u4e2a\u516c\u5f0f\u4e5f\u662f\u76f8\u5173\u7684\uff1ahttps:\/\/blog.csdn.net\/ptsx0607\/article\/details\/68945883<\/a>,\u4fdd\u8bc1\u4e86\u6563\u5217\u7684\u5747\u5300\u6027,\u54c8\u5e0c\u78b0\u649e\u7684\u673a\u7387\u5c31\u4f1a\u51cf\u5c0f\u3002<\/p>\n<\/li>\n\n<\/span>\u5934\u63d2\u6cd5\u4e0e\u94fe\u8868<\/span><\/h2>\nhttps:\/\/blog.csdn.net\/insomsia\/article\/details\/88367436<\/a>\n\u770bput\u65b9\u6cd5\uff1a<\/p>\n @Override public V put(K key, V value) {\n if (key == null) {\n return putValueForNullKey(value);\n }\n\n int hash = secondaryHash(key);\n HashMapEntry[] tab = table;\n int index = hash & (tab.length - 1);\n for (HashMapEntry e = tab[index]; e != null; e = e.next) {\n if (e.hash == hash && key.equals(e.key)) { \n preModify(e);\n V oldValue = e.value;\n e.value = value;\n return oldValue;\n }\n }\n\n \/\/ No entry for (non-null) key is present; create one\n modCount++;\n if (size++ > threshold) {\n tab = doubleCapacity();\n index = hash & (tab.length - 1);\n }\n addNewEntry(key, value, hash, index);\n return null;\n}\n<\/code><\/pre>\n\u91cd\u590d\u5143\u7d20\u5224\u65ad:hash\u76f8\u540c\uff0ckey\u76f8\u540c\u7684\u80af\u5b9a\u662f\u540c\u4e00\u4e2a\u5143\u7d20\u3002<\/strong><\/p>\ne.hash == hash && key.equals(e.key)<\/code><\/pre>\n\u4f46\u662f\u53ef\u80fd\u4e0d\u540c\u7684\u5143\u7d20hash\u503c\u4e0d\u4e00\u6837\uff0c\u7b97\u51fa\u7684index\u5374\u4e00\u6837\uff0c\u4f46\u662f\u53c8\u4e0d\u662f\u540c\u4e00\u4e2a\u5143\u7d20(\u8fd9\u5c31\u662f\u54c8\u5e0c\u78b0\u649e\u95ee\u9898\uff0c\u54c8\u5e0c\u7b97\u6cd5\u65e0\u6cd5\u9003\u907f\u8fd9\u4e2a\u95ee\u9898<\/strong>)\uff0c\u6570\u7ec4\u4e2d\u7684\u8fd9\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u5df2\u7ecf\u88ab\u5360\u636e\u4e86\uff0c\u90a3\u4e48\u6211\u600e\u4e48\u5b58\u50a8\u8fd9\u4e2a\u65b0\u7684\u5143\u7d20\u5462\uff1f\n\u8bf7\u770bHashMapEntry\u8fd9\u4e2a\u7c7b\uff1a\n\n\u518d\u770b\u6dfb\u52a0HashMapEntry\u7684\u65b9\u6cd5\uff1a<\/p>\nvoid addNewEntry(K key, V value, int hash, int index) {\n table[index] = new HashMapEntry(key, value, hash, table[index]);\n}\n\nHashMapEntry(K key, V value, int hash, HashMapEntry next) {\n this.key = key;\n this.value = value;\n this.hash = hash;\n this.next = next;\n }<\/code><\/pre>\n\n\u5bf9\u4e8eaddNewEntry\u65b9\u6cd5\n\u5982\u679cindex\u5904\u672c\u8eab\u6ca1\u6709\u5143\u7d20\u5360\u636e\uff0c\u6b64\u65f6table[index]\u5c31\u662fnull\u3002\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662fnull\uff1b<\/p>\n\u5982\u679cindex\u5904\u672c\u8eab\u6709\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u4e86\uff0c\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u7684\u5143\u7d20\u3002\u5934\u63d2\u6cd5\u5c31\u662f\u8fd9\u4e48\u6765\u7684\u3002<\/p>\nkey\u4e3anull\uff0cHashMap\u662f\u5355\u72ec\u7528\u4e00\u4e2aHashMapEntry\u53d8\u91cf\u6765\u5b58\u50a8\u7684\uff0c\u5e76\u4e0d\u662f\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\u6240\u6709\u7684\u589e\u5220\u6539\u67e5\n\u90fd\u662f\u5148\u5224\u65ad\u7684key\u662f\u5426\u4e3anull\u3002<\/p>\n<\/blockquote>\n\u5bf9\u4e8e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u4eba\u6765\u8bf4\uff0c\u5f97\u51fa\u4e0a\u9762\u7684\u7ed3\u8bba\u53ef\u80fd\u4e0d\u96be\u3002\u4f46\u662f\u5bf9\u4e8e\u975e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u6211\u6765\u8bf4\uff0c\u6162\u6162\u7684\u53d1\u73b0\u4e86\u6570\u636e\u7ed3\u6784\u4e4b\u7c7b\uff0c\u7b80\u76f4\u592a\u7f8e\u5999\u4e86\uff01<\/p>\n<\/li>\n\n\u54c8\u5e0c\u51b2\u7a81\nhttps:\/\/www.iteye.com\/blog\/xiaolu123456-1485349<\/a>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\n<\/li>\n\n\u5e76\u53d1\u5bfc\u81f4\u7684\u6b7b\u5faa\u73af\u95ee\u9898\nhttps:\/\/blog.csdn.net\/pange1991\/article\/details\/82377980<\/a>\nhttps:\/\/www.jianshu.com\/p\/61a829fa4e49<\/a><\/p>\n<\/li>\n<\/ul>\n<\/span>JDK1.8\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u77e5\u8bc6\u70b9\u9884\u5907-\u7ea2\u9ed1\u6811<\/a><\/span><\/h2>\nhttps:\/\/blog.csdn.net\/u010890358\/article\/details\/80496144<\/a> \uff08\u8be6\u7ec6\u89e3\u91ca\u6bcf\u884c\u4ee3\u7801\uff09<\/p>\nhttps:\/\/www.jianshu.com\/p\/400f3c019557<\/a><\/p>\n\u6536\u85cf <\/i><\/button>","protected":false},"excerpt":{"rendered":"\u4e0d\u540c\u7248\u672c\u7684JDK\u7684HashMap\u7684\u5e95\u5c42\u5b9e\u73b0\u5747\u6709\u6240\u4e0d\u540c \u76ee\u5f55 JDK\u5404\u4e2a\u7248\u672c\u7684\u6e90\u7801\u67e5\u770bHashMap\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[597],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7993"}],"version-history":[{"count":4,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions"}],"predecessor-version":[{"id":8000,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions\/8000"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7993"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
https:\/\/www.cnblogs.com\/little-fly\/p\/7344285.html<\/a><\/p>\nhttps:\/\/blog.csdn.net\/qq_22200097\/article\/details\/82791479<\/a><\/p>\n<\/span>JDK1.7\u53ca\u4ee5\u4e0b\u7684HashMap\u5b9e\u73b0<\/span><\/h1>\n\nHashMap\u7684\u4e3b\u5e72\u662f\u6570\u7ec4(\u4e0d\u8981\u4ee5\u4e3a\u5e26\u4e2aHash\u5c31\u548cHashTable\u626f\u4e0a\u5173\u7cfb\u4e86)\uff0c\u6570\u7ec4\u7684\u5143\u7d20\u662fHashMapEntry<\/li>\nHashMapEntry\u662f\u4e00\u4e2a\u94fe\u8868\u7ed3\u6784<\/li>\n<\/ul>\nhttps:\/\/blog.csdn.net\/qq_38455201\/article\/details\/80732839<\/a><\/p>\nhttps:\/\/blog.csdn.net\/C18298182575\/article\/details\/87167323<\/a><\/p>\n<\/span>JDK1.5\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u4e3b\u5e72\u6570\u7ec4\u521d\u59cb\u5316<\/span><\/h2>\n \/**\n * Min capacity (other than zero) for a HashMap. Must be a power of two\n * greater than 1 (and less than 1 << 30).\n *\/\n private static final int MINIMUM_CAPACITY = 4;\n\n \/**\n * An empty table shared by all zero-capacity maps (typically from default\n * constructor). It is never written to, and replaced on first put. Its size\n * is set to half the minimum, so that the first resize will create a\n * minimum-sized table.\n *\/\n private static final Entry[] EMPTY_TABLE\n = new HashMapEntry[MINIMUM_CAPACITY >>> 1];\n\n \/**\n * Constructs a new empty {@code HashMap} instance.\n *\/\n @SuppressWarnings("unchecked")\n public HashMap() {\n table = (HashMapEntry<K, V>[]) EMPTY_TABLE;\n threshold = -1; \/\/ Forces first put invocation to replace EMPTY_TABLE\n }<\/code><\/pre>\n\u53ef\u89c1\uff0cHashMap\u7684\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\u9ed8\u8ba4\u4f1a\u521b\u5efa\u4e00\u4e2a\u5927\u5c0f\u4e3a2\u7684\u6570\u7ec4\u3002\n...\u7248\u672c\u592a\u65e7\uff0c\u5c31\u4e0d\u5f80\u4e0b\u5206\u6790\u4e86\u3002<\/p>\n<\/span>JDK1.6\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/blog.csdn.net\/rocksteadypro\/article\/details\/80082822<\/a><\/p>\n<\/span>JDK1.7\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/www.cnblogs.com\/xiaolovewei\/p\/7993521.html<\/a><\/p>\nhttps:\/\/www.cnblogs.com\/xiaozhongfeixiang\/archive\/2019\/09\/23\/11548563.html<\/a><\/p>\n\u9700\u8981\u6ce8\u610f\u7684\u70b9\uff1a<\/p>\n\n\n<\/span>key\u662f\u5982\u4f55\u8ba1\u7b97\u51fa\u6570\u7ec4\u7684\u4e0b\u6807\u7684<\/span><\/h2>\n\n\u54c8\u5e0c\u503c\u6c42\u6570\u7ec4\u4e0b\u6807<\/p>\nhash & (tab.length - 1);<\/code><\/pre>\n\u6269\u5bb9\u4e3a\u5565\u662f2\u7684\u500d\u6570\uff0c\u548c\u4e0a\u9762\u8fd9\u4e2a\u516c\u5f0f\u4e5f\u662f\u76f8\u5173\u7684\uff1ahttps:\/\/blog.csdn.net\/ptsx0607\/article\/details\/68945883<\/a>,\u4fdd\u8bc1\u4e86\u6563\u5217\u7684\u5747\u5300\u6027,\u54c8\u5e0c\u78b0\u649e\u7684\u673a\u7387\u5c31\u4f1a\u51cf\u5c0f\u3002<\/p>\n<\/li>\n\n<\/span>\u5934\u63d2\u6cd5\u4e0e\u94fe\u8868<\/span><\/h2>\nhttps:\/\/blog.csdn.net\/insomsia\/article\/details\/88367436<\/a>\n\u770bput\u65b9\u6cd5\uff1a<\/p>\n @Override public V put(K key, V value) {\n if (key == null) {\n return putValueForNullKey(value);\n }\n\n int hash = secondaryHash(key);\n HashMapEntry[] tab = table;\n int index = hash & (tab.length - 1);\n for (HashMapEntry e = tab[index]; e != null; e = e.next) {\n if (e.hash == hash && key.equals(e.key)) { \n preModify(e);\n V oldValue = e.value;\n e.value = value;\n return oldValue;\n }\n }\n\n \/\/ No entry for (non-null) key is present; create one\n modCount++;\n if (size++ > threshold) {\n tab = doubleCapacity();\n index = hash & (tab.length - 1);\n }\n addNewEntry(key, value, hash, index);\n return null;\n}\n<\/code><\/pre>\n\u91cd\u590d\u5143\u7d20\u5224\u65ad:hash\u76f8\u540c\uff0ckey\u76f8\u540c\u7684\u80af\u5b9a\u662f\u540c\u4e00\u4e2a\u5143\u7d20\u3002<\/strong><\/p>\ne.hash == hash && key.equals(e.key)<\/code><\/pre>\n\u4f46\u662f\u53ef\u80fd\u4e0d\u540c\u7684\u5143\u7d20hash\u503c\u4e0d\u4e00\u6837\uff0c\u7b97\u51fa\u7684index\u5374\u4e00\u6837\uff0c\u4f46\u662f\u53c8\u4e0d\u662f\u540c\u4e00\u4e2a\u5143\u7d20(\u8fd9\u5c31\u662f\u54c8\u5e0c\u78b0\u649e\u95ee\u9898\uff0c\u54c8\u5e0c\u7b97\u6cd5\u65e0\u6cd5\u9003\u907f\u8fd9\u4e2a\u95ee\u9898<\/strong>)\uff0c\u6570\u7ec4\u4e2d\u7684\u8fd9\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u5df2\u7ecf\u88ab\u5360\u636e\u4e86\uff0c\u90a3\u4e48\u6211\u600e\u4e48\u5b58\u50a8\u8fd9\u4e2a\u65b0\u7684\u5143\u7d20\u5462\uff1f\n\u8bf7\u770bHashMapEntry\u8fd9\u4e2a\u7c7b\uff1a\n\n\u518d\u770b\u6dfb\u52a0HashMapEntry\u7684\u65b9\u6cd5\uff1a<\/p>\nvoid addNewEntry(K key, V value, int hash, int index) {\n table[index] = new HashMapEntry(key, value, hash, table[index]);\n}\n\nHashMapEntry(K key, V value, int hash, HashMapEntry next) {\n this.key = key;\n this.value = value;\n this.hash = hash;\n this.next = next;\n }<\/code><\/pre>\n\n\u5bf9\u4e8eaddNewEntry\u65b9\u6cd5\n\u5982\u679cindex\u5904\u672c\u8eab\u6ca1\u6709\u5143\u7d20\u5360\u636e\uff0c\u6b64\u65f6table[index]\u5c31\u662fnull\u3002\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662fnull\uff1b<\/p>\n\u5982\u679cindex\u5904\u672c\u8eab\u6709\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u4e86\uff0c\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u7684\u5143\u7d20\u3002\u5934\u63d2\u6cd5\u5c31\u662f\u8fd9\u4e48\u6765\u7684\u3002<\/p>\nkey\u4e3anull\uff0cHashMap\u662f\u5355\u72ec\u7528\u4e00\u4e2aHashMapEntry\u53d8\u91cf\u6765\u5b58\u50a8\u7684\uff0c\u5e76\u4e0d\u662f\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\u6240\u6709\u7684\u589e\u5220\u6539\u67e5\n\u90fd\u662f\u5148\u5224\u65ad\u7684key\u662f\u5426\u4e3anull\u3002<\/p>\n<\/blockquote>\n\u5bf9\u4e8e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u4eba\u6765\u8bf4\uff0c\u5f97\u51fa\u4e0a\u9762\u7684\u7ed3\u8bba\u53ef\u80fd\u4e0d\u96be\u3002\u4f46\u662f\u5bf9\u4e8e\u975e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u6211\u6765\u8bf4\uff0c\u6162\u6162\u7684\u53d1\u73b0\u4e86\u6570\u636e\u7ed3\u6784\u4e4b\u7c7b\uff0c\u7b80\u76f4\u592a\u7f8e\u5999\u4e86\uff01<\/p>\n<\/li>\n\n\u54c8\u5e0c\u51b2\u7a81\nhttps:\/\/www.iteye.com\/blog\/xiaolu123456-1485349<\/a>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\n<\/li>\n\n\u5e76\u53d1\u5bfc\u81f4\u7684\u6b7b\u5faa\u73af\u95ee\u9898\nhttps:\/\/blog.csdn.net\/pange1991\/article\/details\/82377980<\/a>\nhttps:\/\/www.jianshu.com\/p\/61a829fa4e49<\/a><\/p>\n<\/li>\n<\/ul>\n<\/span>JDK1.8\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u77e5\u8bc6\u70b9\u9884\u5907-\u7ea2\u9ed1\u6811<\/a><\/span><\/h2>\nhttps:\/\/blog.csdn.net\/u010890358\/article\/details\/80496144<\/a> \uff08\u8be6\u7ec6\u89e3\u91ca\u6bcf\u884c\u4ee3\u7801\uff09<\/p>\nhttps:\/\/www.jianshu.com\/p\/400f3c019557<\/a><\/p>\n\u6536\u85cf <\/i><\/button>","protected":false},"excerpt":{"rendered":"\u4e0d\u540c\u7248\u672c\u7684JDK\u7684HashMap\u7684\u5e95\u5c42\u5b9e\u73b0\u5747\u6709\u6240\u4e0d\u540c \u76ee\u5f55 JDK\u5404\u4e2a\u7248\u672c\u7684\u6e90\u7801\u67e5\u770bHashMap\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[597],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7993"}],"version-history":[{"count":4,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions"}],"predecessor-version":[{"id":8000,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions\/8000"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7993"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
https:\/\/blog.csdn.net\/qq_22200097\/article\/details\/82791479<\/a><\/p>\n<\/span>JDK1.7\u53ca\u4ee5\u4e0b\u7684HashMap\u5b9e\u73b0<\/span><\/h1>\n\nHashMap\u7684\u4e3b\u5e72\u662f\u6570\u7ec4(\u4e0d\u8981\u4ee5\u4e3a\u5e26\u4e2aHash\u5c31\u548cHashTable\u626f\u4e0a\u5173\u7cfb\u4e86)\uff0c\u6570\u7ec4\u7684\u5143\u7d20\u662fHashMapEntry<\/li>\nHashMapEntry\u662f\u4e00\u4e2a\u94fe\u8868\u7ed3\u6784<\/li>\n<\/ul>\nhttps:\/\/blog.csdn.net\/qq_38455201\/article\/details\/80732839<\/a><\/p>\nhttps:\/\/blog.csdn.net\/C18298182575\/article\/details\/87167323<\/a><\/p>\n<\/span>JDK1.5\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u4e3b\u5e72\u6570\u7ec4\u521d\u59cb\u5316<\/span><\/h2>\n \/**\n * Min capacity (other than zero) for a HashMap. Must be a power of two\n * greater than 1 (and less than 1 << 30).\n *\/\n private static final int MINIMUM_CAPACITY = 4;\n\n \/**\n * An empty table shared by all zero-capacity maps (typically from default\n * constructor). It is never written to, and replaced on first put. Its size\n * is set to half the minimum, so that the first resize will create a\n * minimum-sized table.\n *\/\n private static final Entry[] EMPTY_TABLE\n = new HashMapEntry[MINIMUM_CAPACITY >>> 1];\n\n \/**\n * Constructs a new empty {@code HashMap} instance.\n *\/\n @SuppressWarnings("unchecked")\n public HashMap() {\n table = (HashMapEntry<K, V>[]) EMPTY_TABLE;\n threshold = -1; \/\/ Forces first put invocation to replace EMPTY_TABLE\n }<\/code><\/pre>\n\u53ef\u89c1\uff0cHashMap\u7684\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\u9ed8\u8ba4\u4f1a\u521b\u5efa\u4e00\u4e2a\u5927\u5c0f\u4e3a2\u7684\u6570\u7ec4\u3002\n...\u7248\u672c\u592a\u65e7\uff0c\u5c31\u4e0d\u5f80\u4e0b\u5206\u6790\u4e86\u3002<\/p>\n<\/span>JDK1.6\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/blog.csdn.net\/rocksteadypro\/article\/details\/80082822<\/a><\/p>\n<\/span>JDK1.7\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/www.cnblogs.com\/xiaolovewei\/p\/7993521.html<\/a><\/p>\nhttps:\/\/www.cnblogs.com\/xiaozhongfeixiang\/archive\/2019\/09\/23\/11548563.html<\/a><\/p>\n\u9700\u8981\u6ce8\u610f\u7684\u70b9\uff1a<\/p>\n\n\n<\/span>key\u662f\u5982\u4f55\u8ba1\u7b97\u51fa\u6570\u7ec4\u7684\u4e0b\u6807\u7684<\/span><\/h2>\n\n\u54c8\u5e0c\u503c\u6c42\u6570\u7ec4\u4e0b\u6807<\/p>\nhash & (tab.length - 1);<\/code><\/pre>\n\u6269\u5bb9\u4e3a\u5565\u662f2\u7684\u500d\u6570\uff0c\u548c\u4e0a\u9762\u8fd9\u4e2a\u516c\u5f0f\u4e5f\u662f\u76f8\u5173\u7684\uff1ahttps:\/\/blog.csdn.net\/ptsx0607\/article\/details\/68945883<\/a>,\u4fdd\u8bc1\u4e86\u6563\u5217\u7684\u5747\u5300\u6027,\u54c8\u5e0c\u78b0\u649e\u7684\u673a\u7387\u5c31\u4f1a\u51cf\u5c0f\u3002<\/p>\n<\/li>\n\n<\/span>\u5934\u63d2\u6cd5\u4e0e\u94fe\u8868<\/span><\/h2>\nhttps:\/\/blog.csdn.net\/insomsia\/article\/details\/88367436<\/a>\n\u770bput\u65b9\u6cd5\uff1a<\/p>\n @Override public V put(K key, V value) {\n if (key == null) {\n return putValueForNullKey(value);\n }\n\n int hash = secondaryHash(key);\n HashMapEntry[] tab = table;\n int index = hash & (tab.length - 1);\n for (HashMapEntry e = tab[index]; e != null; e = e.next) {\n if (e.hash == hash && key.equals(e.key)) { \n preModify(e);\n V oldValue = e.value;\n e.value = value;\n return oldValue;\n }\n }\n\n \/\/ No entry for (non-null) key is present; create one\n modCount++;\n if (size++ > threshold) {\n tab = doubleCapacity();\n index = hash & (tab.length - 1);\n }\n addNewEntry(key, value, hash, index);\n return null;\n}\n<\/code><\/pre>\n\u91cd\u590d\u5143\u7d20\u5224\u65ad:hash\u76f8\u540c\uff0ckey\u76f8\u540c\u7684\u80af\u5b9a\u662f\u540c\u4e00\u4e2a\u5143\u7d20\u3002<\/strong><\/p>\ne.hash == hash && key.equals(e.key)<\/code><\/pre>\n\u4f46\u662f\u53ef\u80fd\u4e0d\u540c\u7684\u5143\u7d20hash\u503c\u4e0d\u4e00\u6837\uff0c\u7b97\u51fa\u7684index\u5374\u4e00\u6837\uff0c\u4f46\u662f\u53c8\u4e0d\u662f\u540c\u4e00\u4e2a\u5143\u7d20(\u8fd9\u5c31\u662f\u54c8\u5e0c\u78b0\u649e\u95ee\u9898\uff0c\u54c8\u5e0c\u7b97\u6cd5\u65e0\u6cd5\u9003\u907f\u8fd9\u4e2a\u95ee\u9898<\/strong>)\uff0c\u6570\u7ec4\u4e2d\u7684\u8fd9\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u5df2\u7ecf\u88ab\u5360\u636e\u4e86\uff0c\u90a3\u4e48\u6211\u600e\u4e48\u5b58\u50a8\u8fd9\u4e2a\u65b0\u7684\u5143\u7d20\u5462\uff1f\n\u8bf7\u770bHashMapEntry\u8fd9\u4e2a\u7c7b\uff1a\n\n\u518d\u770b\u6dfb\u52a0HashMapEntry\u7684\u65b9\u6cd5\uff1a<\/p>\nvoid addNewEntry(K key, V value, int hash, int index) {\n table[index] = new HashMapEntry(key, value, hash, table[index]);\n}\n\nHashMapEntry(K key, V value, int hash, HashMapEntry next) {\n this.key = key;\n this.value = value;\n this.hash = hash;\n this.next = next;\n }<\/code><\/pre>\n\n\u5bf9\u4e8eaddNewEntry\u65b9\u6cd5\n\u5982\u679cindex\u5904\u672c\u8eab\u6ca1\u6709\u5143\u7d20\u5360\u636e\uff0c\u6b64\u65f6table[index]\u5c31\u662fnull\u3002\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662fnull\uff1b<\/p>\n\u5982\u679cindex\u5904\u672c\u8eab\u6709\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u4e86\uff0c\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u7684\u5143\u7d20\u3002\u5934\u63d2\u6cd5\u5c31\u662f\u8fd9\u4e48\u6765\u7684\u3002<\/p>\nkey\u4e3anull\uff0cHashMap\u662f\u5355\u72ec\u7528\u4e00\u4e2aHashMapEntry\u53d8\u91cf\u6765\u5b58\u50a8\u7684\uff0c\u5e76\u4e0d\u662f\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\u6240\u6709\u7684\u589e\u5220\u6539\u67e5\n\u90fd\u662f\u5148\u5224\u65ad\u7684key\u662f\u5426\u4e3anull\u3002<\/p>\n<\/blockquote>\n\u5bf9\u4e8e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u4eba\u6765\u8bf4\uff0c\u5f97\u51fa\u4e0a\u9762\u7684\u7ed3\u8bba\u53ef\u80fd\u4e0d\u96be\u3002\u4f46\u662f\u5bf9\u4e8e\u975e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u6211\u6765\u8bf4\uff0c\u6162\u6162\u7684\u53d1\u73b0\u4e86\u6570\u636e\u7ed3\u6784\u4e4b\u7c7b\uff0c\u7b80\u76f4\u592a\u7f8e\u5999\u4e86\uff01<\/p>\n<\/li>\n\n\u54c8\u5e0c\u51b2\u7a81\nhttps:\/\/www.iteye.com\/blog\/xiaolu123456-1485349<\/a>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\n<\/li>\n\n\u5e76\u53d1\u5bfc\u81f4\u7684\u6b7b\u5faa\u73af\u95ee\u9898\nhttps:\/\/blog.csdn.net\/pange1991\/article\/details\/82377980<\/a>\nhttps:\/\/www.jianshu.com\/p\/61a829fa4e49<\/a><\/p>\n<\/li>\n<\/ul>\n<\/span>JDK1.8\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u77e5\u8bc6\u70b9\u9884\u5907-\u7ea2\u9ed1\u6811<\/a><\/span><\/h2>\nhttps:\/\/blog.csdn.net\/u010890358\/article\/details\/80496144<\/a> \uff08\u8be6\u7ec6\u89e3\u91ca\u6bcf\u884c\u4ee3\u7801\uff09<\/p>\nhttps:\/\/www.jianshu.com\/p\/400f3c019557<\/a><\/p>\n\u6536\u85cf <\/i><\/button>","protected":false},"excerpt":{"rendered":"\u4e0d\u540c\u7248\u672c\u7684JDK\u7684HashMap\u7684\u5e95\u5c42\u5b9e\u73b0\u5747\u6709\u6240\u4e0d\u540c \u76ee\u5f55 JDK\u5404\u4e2a\u7248\u672c\u7684\u6e90\u7801\u67e5\u770bHashMap\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[597],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7993"}],"version-history":[{"count":4,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions"}],"predecessor-version":[{"id":8000,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions\/8000"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7993"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
https:\/\/blog.csdn.net\/qq_38455201\/article\/details\/80732839<\/a><\/p>\nhttps:\/\/blog.csdn.net\/C18298182575\/article\/details\/87167323<\/a><\/p>\n<\/span>JDK1.5\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u4e3b\u5e72\u6570\u7ec4\u521d\u59cb\u5316<\/span><\/h2>\n \/**\n * Min capacity (other than zero) for a HashMap. Must be a power of two\n * greater than 1 (and less than 1 << 30).\n *\/\n private static final int MINIMUM_CAPACITY = 4;\n\n \/**\n * An empty table shared by all zero-capacity maps (typically from default\n * constructor). It is never written to, and replaced on first put. Its size\n * is set to half the minimum, so that the first resize will create a\n * minimum-sized table.\n *\/\n private static final Entry[] EMPTY_TABLE\n = new HashMapEntry[MINIMUM_CAPACITY >>> 1];\n\n \/**\n * Constructs a new empty {@code HashMap} instance.\n *\/\n @SuppressWarnings("unchecked")\n public HashMap() {\n table = (HashMapEntry<K, V>[]) EMPTY_TABLE;\n threshold = -1; \/\/ Forces first put invocation to replace EMPTY_TABLE\n }<\/code><\/pre>\n\u53ef\u89c1\uff0cHashMap\u7684\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\u9ed8\u8ba4\u4f1a\u521b\u5efa\u4e00\u4e2a\u5927\u5c0f\u4e3a2\u7684\u6570\u7ec4\u3002\n...\u7248\u672c\u592a\u65e7\uff0c\u5c31\u4e0d\u5f80\u4e0b\u5206\u6790\u4e86\u3002<\/p>\n<\/span>JDK1.6\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/blog.csdn.net\/rocksteadypro\/article\/details\/80082822<\/a><\/p>\n<\/span>JDK1.7\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/www.cnblogs.com\/xiaolovewei\/p\/7993521.html<\/a><\/p>\nhttps:\/\/www.cnblogs.com\/xiaozhongfeixiang\/archive\/2019\/09\/23\/11548563.html<\/a><\/p>\n\u9700\u8981\u6ce8\u610f\u7684\u70b9\uff1a<\/p>\n\n\n<\/span>key\u662f\u5982\u4f55\u8ba1\u7b97\u51fa\u6570\u7ec4\u7684\u4e0b\u6807\u7684<\/span><\/h2>\n\n\u54c8\u5e0c\u503c\u6c42\u6570\u7ec4\u4e0b\u6807<\/p>\nhash & (tab.length - 1);<\/code><\/pre>\n\u6269\u5bb9\u4e3a\u5565\u662f2\u7684\u500d\u6570\uff0c\u548c\u4e0a\u9762\u8fd9\u4e2a\u516c\u5f0f\u4e5f\u662f\u76f8\u5173\u7684\uff1ahttps:\/\/blog.csdn.net\/ptsx0607\/article\/details\/68945883<\/a>,\u4fdd\u8bc1\u4e86\u6563\u5217\u7684\u5747\u5300\u6027,\u54c8\u5e0c\u78b0\u649e\u7684\u673a\u7387\u5c31\u4f1a\u51cf\u5c0f\u3002<\/p>\n<\/li>\n\n<\/span>\u5934\u63d2\u6cd5\u4e0e\u94fe\u8868<\/span><\/h2>\nhttps:\/\/blog.csdn.net\/insomsia\/article\/details\/88367436<\/a>\n\u770bput\u65b9\u6cd5\uff1a<\/p>\n @Override public V put(K key, V value) {\n if (key == null) {\n return putValueForNullKey(value);\n }\n\n int hash = secondaryHash(key);\n HashMapEntry[] tab = table;\n int index = hash & (tab.length - 1);\n for (HashMapEntry e = tab[index]; e != null; e = e.next) {\n if (e.hash == hash && key.equals(e.key)) { \n preModify(e);\n V oldValue = e.value;\n e.value = value;\n return oldValue;\n }\n }\n\n \/\/ No entry for (non-null) key is present; create one\n modCount++;\n if (size++ > threshold) {\n tab = doubleCapacity();\n index = hash & (tab.length - 1);\n }\n addNewEntry(key, value, hash, index);\n return null;\n}\n<\/code><\/pre>\n\u91cd\u590d\u5143\u7d20\u5224\u65ad:hash\u76f8\u540c\uff0ckey\u76f8\u540c\u7684\u80af\u5b9a\u662f\u540c\u4e00\u4e2a\u5143\u7d20\u3002<\/strong><\/p>\ne.hash == hash && key.equals(e.key)<\/code><\/pre>\n\u4f46\u662f\u53ef\u80fd\u4e0d\u540c\u7684\u5143\u7d20hash\u503c\u4e0d\u4e00\u6837\uff0c\u7b97\u51fa\u7684index\u5374\u4e00\u6837\uff0c\u4f46\u662f\u53c8\u4e0d\u662f\u540c\u4e00\u4e2a\u5143\u7d20(\u8fd9\u5c31\u662f\u54c8\u5e0c\u78b0\u649e\u95ee\u9898\uff0c\u54c8\u5e0c\u7b97\u6cd5\u65e0\u6cd5\u9003\u907f\u8fd9\u4e2a\u95ee\u9898<\/strong>)\uff0c\u6570\u7ec4\u4e2d\u7684\u8fd9\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u5df2\u7ecf\u88ab\u5360\u636e\u4e86\uff0c\u90a3\u4e48\u6211\u600e\u4e48\u5b58\u50a8\u8fd9\u4e2a\u65b0\u7684\u5143\u7d20\u5462\uff1f\n\u8bf7\u770bHashMapEntry\u8fd9\u4e2a\u7c7b\uff1a\n\n\u518d\u770b\u6dfb\u52a0HashMapEntry\u7684\u65b9\u6cd5\uff1a<\/p>\nvoid addNewEntry(K key, V value, int hash, int index) {\n table[index] = new HashMapEntry(key, value, hash, table[index]);\n}\n\nHashMapEntry(K key, V value, int hash, HashMapEntry next) {\n this.key = key;\n this.value = value;\n this.hash = hash;\n this.next = next;\n }<\/code><\/pre>\n\n\u5bf9\u4e8eaddNewEntry\u65b9\u6cd5\n\u5982\u679cindex\u5904\u672c\u8eab\u6ca1\u6709\u5143\u7d20\u5360\u636e\uff0c\u6b64\u65f6table[index]\u5c31\u662fnull\u3002\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662fnull\uff1b<\/p>\n\u5982\u679cindex\u5904\u672c\u8eab\u6709\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u4e86\uff0c\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u7684\u5143\u7d20\u3002\u5934\u63d2\u6cd5\u5c31\u662f\u8fd9\u4e48\u6765\u7684\u3002<\/p>\nkey\u4e3anull\uff0cHashMap\u662f\u5355\u72ec\u7528\u4e00\u4e2aHashMapEntry\u53d8\u91cf\u6765\u5b58\u50a8\u7684\uff0c\u5e76\u4e0d\u662f\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\u6240\u6709\u7684\u589e\u5220\u6539\u67e5\n\u90fd\u662f\u5148\u5224\u65ad\u7684key\u662f\u5426\u4e3anull\u3002<\/p>\n<\/blockquote>\n\u5bf9\u4e8e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u4eba\u6765\u8bf4\uff0c\u5f97\u51fa\u4e0a\u9762\u7684\u7ed3\u8bba\u53ef\u80fd\u4e0d\u96be\u3002\u4f46\u662f\u5bf9\u4e8e\u975e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u6211\u6765\u8bf4\uff0c\u6162\u6162\u7684\u53d1\u73b0\u4e86\u6570\u636e\u7ed3\u6784\u4e4b\u7c7b\uff0c\u7b80\u76f4\u592a\u7f8e\u5999\u4e86\uff01<\/p>\n<\/li>\n\n\u54c8\u5e0c\u51b2\u7a81\nhttps:\/\/www.iteye.com\/blog\/xiaolu123456-1485349<\/a>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\n<\/li>\n\n\u5e76\u53d1\u5bfc\u81f4\u7684\u6b7b\u5faa\u73af\u95ee\u9898\nhttps:\/\/blog.csdn.net\/pange1991\/article\/details\/82377980<\/a>\nhttps:\/\/www.jianshu.com\/p\/61a829fa4e49<\/a><\/p>\n<\/li>\n<\/ul>\n<\/span>JDK1.8\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u77e5\u8bc6\u70b9\u9884\u5907-\u7ea2\u9ed1\u6811<\/a><\/span><\/h2>\nhttps:\/\/blog.csdn.net\/u010890358\/article\/details\/80496144<\/a> \uff08\u8be6\u7ec6\u89e3\u91ca\u6bcf\u884c\u4ee3\u7801\uff09<\/p>\nhttps:\/\/www.jianshu.com\/p\/400f3c019557<\/a><\/p>\n\u6536\u85cf <\/i><\/button>","protected":false},"excerpt":{"rendered":"\u4e0d\u540c\u7248\u672c\u7684JDK\u7684HashMap\u7684\u5e95\u5c42\u5b9e\u73b0\u5747\u6709\u6240\u4e0d\u540c \u76ee\u5f55 JDK\u5404\u4e2a\u7248\u672c\u7684\u6e90\u7801\u67e5\u770bHashMap\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[597],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7993"}],"version-history":[{"count":4,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions"}],"predecessor-version":[{"id":8000,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions\/8000"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7993"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
https:\/\/blog.csdn.net\/C18298182575\/article\/details\/87167323<\/a><\/p>\n<\/span>JDK1.5\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u4e3b\u5e72\u6570\u7ec4\u521d\u59cb\u5316<\/span><\/h2>\n \/**\n * Min capacity (other than zero) for a HashMap. Must be a power of two\n * greater than 1 (and less than 1 << 30).\n *\/\n private static final int MINIMUM_CAPACITY = 4;\n\n \/**\n * An empty table shared by all zero-capacity maps (typically from default\n * constructor). It is never written to, and replaced on first put. Its size\n * is set to half the minimum, so that the first resize will create a\n * minimum-sized table.\n *\/\n private static final Entry[] EMPTY_TABLE\n = new HashMapEntry[MINIMUM_CAPACITY >>> 1];\n\n \/**\n * Constructs a new empty {@code HashMap} instance.\n *\/\n @SuppressWarnings("unchecked")\n public HashMap() {\n table = (HashMapEntry<K, V>[]) EMPTY_TABLE;\n threshold = -1; \/\/ Forces first put invocation to replace EMPTY_TABLE\n }<\/code><\/pre>\n\u53ef\u89c1\uff0cHashMap\u7684\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\u9ed8\u8ba4\u4f1a\u521b\u5efa\u4e00\u4e2a\u5927\u5c0f\u4e3a2\u7684\u6570\u7ec4\u3002\n...\u7248\u672c\u592a\u65e7\uff0c\u5c31\u4e0d\u5f80\u4e0b\u5206\u6790\u4e86\u3002<\/p>\n<\/span>JDK1.6\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/blog.csdn.net\/rocksteadypro\/article\/details\/80082822<\/a><\/p>\n<\/span>JDK1.7\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/www.cnblogs.com\/xiaolovewei\/p\/7993521.html<\/a><\/p>\nhttps:\/\/www.cnblogs.com\/xiaozhongfeixiang\/archive\/2019\/09\/23\/11548563.html<\/a><\/p>\n\u9700\u8981\u6ce8\u610f\u7684\u70b9\uff1a<\/p>\n\n\n<\/span>key\u662f\u5982\u4f55\u8ba1\u7b97\u51fa\u6570\u7ec4\u7684\u4e0b\u6807\u7684<\/span><\/h2>\n\n\u54c8\u5e0c\u503c\u6c42\u6570\u7ec4\u4e0b\u6807<\/p>\nhash & (tab.length - 1);<\/code><\/pre>\n\u6269\u5bb9\u4e3a\u5565\u662f2\u7684\u500d\u6570\uff0c\u548c\u4e0a\u9762\u8fd9\u4e2a\u516c\u5f0f\u4e5f\u662f\u76f8\u5173\u7684\uff1ahttps:\/\/blog.csdn.net\/ptsx0607\/article\/details\/68945883<\/a>,\u4fdd\u8bc1\u4e86\u6563\u5217\u7684\u5747\u5300\u6027,\u54c8\u5e0c\u78b0\u649e\u7684\u673a\u7387\u5c31\u4f1a\u51cf\u5c0f\u3002<\/p>\n<\/li>\n\n<\/span>\u5934\u63d2\u6cd5\u4e0e\u94fe\u8868<\/span><\/h2>\nhttps:\/\/blog.csdn.net\/insomsia\/article\/details\/88367436<\/a>\n\u770bput\u65b9\u6cd5\uff1a<\/p>\n @Override public V put(K key, V value) {\n if (key == null) {\n return putValueForNullKey(value);\n }\n\n int hash = secondaryHash(key);\n HashMapEntry[] tab = table;\n int index = hash & (tab.length - 1);\n for (HashMapEntry e = tab[index]; e != null; e = e.next) {\n if (e.hash == hash && key.equals(e.key)) { \n preModify(e);\n V oldValue = e.value;\n e.value = value;\n return oldValue;\n }\n }\n\n \/\/ No entry for (non-null) key is present; create one\n modCount++;\n if (size++ > threshold) {\n tab = doubleCapacity();\n index = hash & (tab.length - 1);\n }\n addNewEntry(key, value, hash, index);\n return null;\n}\n<\/code><\/pre>\n\u91cd\u590d\u5143\u7d20\u5224\u65ad:hash\u76f8\u540c\uff0ckey\u76f8\u540c\u7684\u80af\u5b9a\u662f\u540c\u4e00\u4e2a\u5143\u7d20\u3002<\/strong><\/p>\ne.hash == hash && key.equals(e.key)<\/code><\/pre>\n\u4f46\u662f\u53ef\u80fd\u4e0d\u540c\u7684\u5143\u7d20hash\u503c\u4e0d\u4e00\u6837\uff0c\u7b97\u51fa\u7684index\u5374\u4e00\u6837\uff0c\u4f46\u662f\u53c8\u4e0d\u662f\u540c\u4e00\u4e2a\u5143\u7d20(\u8fd9\u5c31\u662f\u54c8\u5e0c\u78b0\u649e\u95ee\u9898\uff0c\u54c8\u5e0c\u7b97\u6cd5\u65e0\u6cd5\u9003\u907f\u8fd9\u4e2a\u95ee\u9898<\/strong>)\uff0c\u6570\u7ec4\u4e2d\u7684\u8fd9\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u5df2\u7ecf\u88ab\u5360\u636e\u4e86\uff0c\u90a3\u4e48\u6211\u600e\u4e48\u5b58\u50a8\u8fd9\u4e2a\u65b0\u7684\u5143\u7d20\u5462\uff1f\n\u8bf7\u770bHashMapEntry\u8fd9\u4e2a\u7c7b\uff1a\n\n\u518d\u770b\u6dfb\u52a0HashMapEntry\u7684\u65b9\u6cd5\uff1a<\/p>\nvoid addNewEntry(K key, V value, int hash, int index) {\n table[index] = new HashMapEntry(key, value, hash, table[index]);\n}\n\nHashMapEntry(K key, V value, int hash, HashMapEntry next) {\n this.key = key;\n this.value = value;\n this.hash = hash;\n this.next = next;\n }<\/code><\/pre>\n\n\u5bf9\u4e8eaddNewEntry\u65b9\u6cd5\n\u5982\u679cindex\u5904\u672c\u8eab\u6ca1\u6709\u5143\u7d20\u5360\u636e\uff0c\u6b64\u65f6table[index]\u5c31\u662fnull\u3002\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662fnull\uff1b<\/p>\n\u5982\u679cindex\u5904\u672c\u8eab\u6709\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u4e86\uff0c\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u7684\u5143\u7d20\u3002\u5934\u63d2\u6cd5\u5c31\u662f\u8fd9\u4e48\u6765\u7684\u3002<\/p>\nkey\u4e3anull\uff0cHashMap\u662f\u5355\u72ec\u7528\u4e00\u4e2aHashMapEntry\u53d8\u91cf\u6765\u5b58\u50a8\u7684\uff0c\u5e76\u4e0d\u662f\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\u6240\u6709\u7684\u589e\u5220\u6539\u67e5\n\u90fd\u662f\u5148\u5224\u65ad\u7684key\u662f\u5426\u4e3anull\u3002<\/p>\n<\/blockquote>\n\u5bf9\u4e8e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u4eba\u6765\u8bf4\uff0c\u5f97\u51fa\u4e0a\u9762\u7684\u7ed3\u8bba\u53ef\u80fd\u4e0d\u96be\u3002\u4f46\u662f\u5bf9\u4e8e\u975e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u6211\u6765\u8bf4\uff0c\u6162\u6162\u7684\u53d1\u73b0\u4e86\u6570\u636e\u7ed3\u6784\u4e4b\u7c7b\uff0c\u7b80\u76f4\u592a\u7f8e\u5999\u4e86\uff01<\/p>\n<\/li>\n\n\u54c8\u5e0c\u51b2\u7a81\nhttps:\/\/www.iteye.com\/blog\/xiaolu123456-1485349<\/a>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\n<\/li>\n\n\u5e76\u53d1\u5bfc\u81f4\u7684\u6b7b\u5faa\u73af\u95ee\u9898\nhttps:\/\/blog.csdn.net\/pange1991\/article\/details\/82377980<\/a>\nhttps:\/\/www.jianshu.com\/p\/61a829fa4e49<\/a><\/p>\n<\/li>\n<\/ul>\n<\/span>JDK1.8\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u77e5\u8bc6\u70b9\u9884\u5907-\u7ea2\u9ed1\u6811<\/a><\/span><\/h2>\nhttps:\/\/blog.csdn.net\/u010890358\/article\/details\/80496144<\/a> \uff08\u8be6\u7ec6\u89e3\u91ca\u6bcf\u884c\u4ee3\u7801\uff09<\/p>\nhttps:\/\/www.jianshu.com\/p\/400f3c019557<\/a><\/p>\n\u6536\u85cf <\/i><\/button>","protected":false},"excerpt":{"rendered":"\u4e0d\u540c\u7248\u672c\u7684JDK\u7684HashMap\u7684\u5e95\u5c42\u5b9e\u73b0\u5747\u6709\u6240\u4e0d\u540c \u76ee\u5f55 JDK\u5404\u4e2a\u7248\u672c\u7684\u6e90\u7801\u67e5\u770bHashMap\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[597],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7993"}],"version-history":[{"count":4,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions"}],"predecessor-version":[{"id":8000,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions\/8000"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7993"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\/**\n * Min capacity (other than zero) for a HashMap. Must be a power of two\n * greater than 1 (and less than 1 << 30).\n *\/\n private static final int MINIMUM_CAPACITY = 4;\n\n \/**\n * An empty table shared by all zero-capacity maps (typically from default\n * constructor). It is never written to, and replaced on first put. Its size\n * is set to half the minimum, so that the first resize will create a\n * minimum-sized table.\n *\/\n private static final Entry[] EMPTY_TABLE\n = new HashMapEntry[MINIMUM_CAPACITY >>> 1];\n\n \/**\n * Constructs a new empty {@code HashMap} instance.\n *\/\n @SuppressWarnings("unchecked")\n public HashMap() {\n table = (HashMapEntry<K, V>[]) EMPTY_TABLE;\n threshold = -1; \/\/ Forces first put invocation to replace EMPTY_TABLE\n }<\/code><\/pre>\n\u53ef\u89c1\uff0cHashMap\u7684\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\u9ed8\u8ba4\u4f1a\u521b\u5efa\u4e00\u4e2a\u5927\u5c0f\u4e3a2\u7684\u6570\u7ec4\u3002\n...\u7248\u672c\u592a\u65e7\uff0c\u5c31\u4e0d\u5f80\u4e0b\u5206\u6790\u4e86\u3002<\/p>\n<\/span>JDK1.6\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/blog.csdn.net\/rocksteadypro\/article\/details\/80082822<\/a><\/p>\n<\/span>JDK1.7\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/www.cnblogs.com\/xiaolovewei\/p\/7993521.html<\/a><\/p>\nhttps:\/\/www.cnblogs.com\/xiaozhongfeixiang\/archive\/2019\/09\/23\/11548563.html<\/a><\/p>\n\u9700\u8981\u6ce8\u610f\u7684\u70b9\uff1a<\/p>\n\n\n<\/span>key\u662f\u5982\u4f55\u8ba1\u7b97\u51fa\u6570\u7ec4\u7684\u4e0b\u6807\u7684<\/span><\/h2>\n\n\u54c8\u5e0c\u503c\u6c42\u6570\u7ec4\u4e0b\u6807<\/p>\nhash & (tab.length - 1);<\/code><\/pre>\n\u6269\u5bb9\u4e3a\u5565\u662f2\u7684\u500d\u6570\uff0c\u548c\u4e0a\u9762\u8fd9\u4e2a\u516c\u5f0f\u4e5f\u662f\u76f8\u5173\u7684\uff1ahttps:\/\/blog.csdn.net\/ptsx0607\/article\/details\/68945883<\/a>,\u4fdd\u8bc1\u4e86\u6563\u5217\u7684\u5747\u5300\u6027,\u54c8\u5e0c\u78b0\u649e\u7684\u673a\u7387\u5c31\u4f1a\u51cf\u5c0f\u3002<\/p>\n<\/li>\n\n<\/span>\u5934\u63d2\u6cd5\u4e0e\u94fe\u8868<\/span><\/h2>\nhttps:\/\/blog.csdn.net\/insomsia\/article\/details\/88367436<\/a>\n\u770bput\u65b9\u6cd5\uff1a<\/p>\n @Override public V put(K key, V value) {\n if (key == null) {\n return putValueForNullKey(value);\n }\n\n int hash = secondaryHash(key);\n HashMapEntry[] tab = table;\n int index = hash & (tab.length - 1);\n for (HashMapEntry e = tab[index]; e != null; e = e.next) {\n if (e.hash == hash && key.equals(e.key)) { \n preModify(e);\n V oldValue = e.value;\n e.value = value;\n return oldValue;\n }\n }\n\n \/\/ No entry for (non-null) key is present; create one\n modCount++;\n if (size++ > threshold) {\n tab = doubleCapacity();\n index = hash & (tab.length - 1);\n }\n addNewEntry(key, value, hash, index);\n return null;\n}\n<\/code><\/pre>\n\u91cd\u590d\u5143\u7d20\u5224\u65ad:hash\u76f8\u540c\uff0ckey\u76f8\u540c\u7684\u80af\u5b9a\u662f\u540c\u4e00\u4e2a\u5143\u7d20\u3002<\/strong><\/p>\ne.hash == hash && key.equals(e.key)<\/code><\/pre>\n\u4f46\u662f\u53ef\u80fd\u4e0d\u540c\u7684\u5143\u7d20hash\u503c\u4e0d\u4e00\u6837\uff0c\u7b97\u51fa\u7684index\u5374\u4e00\u6837\uff0c\u4f46\u662f\u53c8\u4e0d\u662f\u540c\u4e00\u4e2a\u5143\u7d20(\u8fd9\u5c31\u662f\u54c8\u5e0c\u78b0\u649e\u95ee\u9898\uff0c\u54c8\u5e0c\u7b97\u6cd5\u65e0\u6cd5\u9003\u907f\u8fd9\u4e2a\u95ee\u9898<\/strong>)\uff0c\u6570\u7ec4\u4e2d\u7684\u8fd9\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u5df2\u7ecf\u88ab\u5360\u636e\u4e86\uff0c\u90a3\u4e48\u6211\u600e\u4e48\u5b58\u50a8\u8fd9\u4e2a\u65b0\u7684\u5143\u7d20\u5462\uff1f\n\u8bf7\u770bHashMapEntry\u8fd9\u4e2a\u7c7b\uff1a\n\n\u518d\u770b\u6dfb\u52a0HashMapEntry\u7684\u65b9\u6cd5\uff1a<\/p>\nvoid addNewEntry(K key, V value, int hash, int index) {\n table[index] = new HashMapEntry(key, value, hash, table[index]);\n}\n\nHashMapEntry(K key, V value, int hash, HashMapEntry next) {\n this.key = key;\n this.value = value;\n this.hash = hash;\n this.next = next;\n }<\/code><\/pre>\n\n\u5bf9\u4e8eaddNewEntry\u65b9\u6cd5\n\u5982\u679cindex\u5904\u672c\u8eab\u6ca1\u6709\u5143\u7d20\u5360\u636e\uff0c\u6b64\u65f6table[index]\u5c31\u662fnull\u3002\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662fnull\uff1b<\/p>\n\u5982\u679cindex\u5904\u672c\u8eab\u6709\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u4e86\uff0c\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u7684\u5143\u7d20\u3002\u5934\u63d2\u6cd5\u5c31\u662f\u8fd9\u4e48\u6765\u7684\u3002<\/p>\nkey\u4e3anull\uff0cHashMap\u662f\u5355\u72ec\u7528\u4e00\u4e2aHashMapEntry\u53d8\u91cf\u6765\u5b58\u50a8\u7684\uff0c\u5e76\u4e0d\u662f\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\u6240\u6709\u7684\u589e\u5220\u6539\u67e5\n\u90fd\u662f\u5148\u5224\u65ad\u7684key\u662f\u5426\u4e3anull\u3002<\/p>\n<\/blockquote>\n\u5bf9\u4e8e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u4eba\u6765\u8bf4\uff0c\u5f97\u51fa\u4e0a\u9762\u7684\u7ed3\u8bba\u53ef\u80fd\u4e0d\u96be\u3002\u4f46\u662f\u5bf9\u4e8e\u975e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u6211\u6765\u8bf4\uff0c\u6162\u6162\u7684\u53d1\u73b0\u4e86\u6570\u636e\u7ed3\u6784\u4e4b\u7c7b\uff0c\u7b80\u76f4\u592a\u7f8e\u5999\u4e86\uff01<\/p>\n<\/li>\n\n\u54c8\u5e0c\u51b2\u7a81\nhttps:\/\/www.iteye.com\/blog\/xiaolu123456-1485349<\/a>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\n<\/li>\n\n\u5e76\u53d1\u5bfc\u81f4\u7684\u6b7b\u5faa\u73af\u95ee\u9898\nhttps:\/\/blog.csdn.net\/pange1991\/article\/details\/82377980<\/a>\nhttps:\/\/www.jianshu.com\/p\/61a829fa4e49<\/a><\/p>\n<\/li>\n<\/ul>\n<\/span>JDK1.8\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u77e5\u8bc6\u70b9\u9884\u5907-\u7ea2\u9ed1\u6811<\/a><\/span><\/h2>\nhttps:\/\/blog.csdn.net\/u010890358\/article\/details\/80496144<\/a> \uff08\u8be6\u7ec6\u89e3\u91ca\u6bcf\u884c\u4ee3\u7801\uff09<\/p>\nhttps:\/\/www.jianshu.com\/p\/400f3c019557<\/a><\/p>\n\u6536\u85cf <\/i><\/button>","protected":false},"excerpt":{"rendered":"\u4e0d\u540c\u7248\u672c\u7684JDK\u7684HashMap\u7684\u5e95\u5c42\u5b9e\u73b0\u5747\u6709\u6240\u4e0d\u540c \u76ee\u5f55 JDK\u5404\u4e2a\u7248\u672c\u7684\u6e90\u7801\u67e5\u770bHashMap\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[597],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7993"}],"version-history":[{"count":4,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions"}],"predecessor-version":[{"id":8000,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions\/8000"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7993"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\u53ef\u89c1\uff0cHashMap\u7684\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\u9ed8\u8ba4\u4f1a\u521b\u5efa\u4e00\u4e2a\u5927\u5c0f\u4e3a2\u7684\u6570\u7ec4\u3002\n...\u7248\u672c\u592a\u65e7\uff0c\u5c31\u4e0d\u5f80\u4e0b\u5206\u6790\u4e86\u3002<\/p>\n
https:\/\/blog.csdn.net\/rocksteadypro\/article\/details\/80082822<\/a><\/p>\n<\/span>JDK1.7\u6e90\u7801\u5206\u6790<\/span><\/h1>\nhttps:\/\/www.cnblogs.com\/xiaolovewei\/p\/7993521.html<\/a><\/p>\nhttps:\/\/www.cnblogs.com\/xiaozhongfeixiang\/archive\/2019\/09\/23\/11548563.html<\/a><\/p>\n\u9700\u8981\u6ce8\u610f\u7684\u70b9\uff1a<\/p>\n\n\n<\/span>key\u662f\u5982\u4f55\u8ba1\u7b97\u51fa\u6570\u7ec4\u7684\u4e0b\u6807\u7684<\/span><\/h2>\n\n\u54c8\u5e0c\u503c\u6c42\u6570\u7ec4\u4e0b\u6807<\/p>\nhash & (tab.length - 1);<\/code><\/pre>\n\u6269\u5bb9\u4e3a\u5565\u662f2\u7684\u500d\u6570\uff0c\u548c\u4e0a\u9762\u8fd9\u4e2a\u516c\u5f0f\u4e5f\u662f\u76f8\u5173\u7684\uff1ahttps:\/\/blog.csdn.net\/ptsx0607\/article\/details\/68945883<\/a>,\u4fdd\u8bc1\u4e86\u6563\u5217\u7684\u5747\u5300\u6027,\u54c8\u5e0c\u78b0\u649e\u7684\u673a\u7387\u5c31\u4f1a\u51cf\u5c0f\u3002<\/p>\n<\/li>\n\n<\/span>\u5934\u63d2\u6cd5\u4e0e\u94fe\u8868<\/span><\/h2>\nhttps:\/\/blog.csdn.net\/insomsia\/article\/details\/88367436<\/a>\n\u770bput\u65b9\u6cd5\uff1a<\/p>\n @Override public V put(K key, V value) {\n if (key == null) {\n return putValueForNullKey(value);\n }\n\n int hash = secondaryHash(key);\n HashMapEntry[] tab = table;\n int index = hash & (tab.length - 1);\n for (HashMapEntry e = tab[index]; e != null; e = e.next) {\n if (e.hash == hash && key.equals(e.key)) { \n preModify(e);\n V oldValue = e.value;\n e.value = value;\n return oldValue;\n }\n }\n\n \/\/ No entry for (non-null) key is present; create one\n modCount++;\n if (size++ > threshold) {\n tab = doubleCapacity();\n index = hash & (tab.length - 1);\n }\n addNewEntry(key, value, hash, index);\n return null;\n}\n<\/code><\/pre>\n\u91cd\u590d\u5143\u7d20\u5224\u65ad:hash\u76f8\u540c\uff0ckey\u76f8\u540c\u7684\u80af\u5b9a\u662f\u540c\u4e00\u4e2a\u5143\u7d20\u3002<\/strong><\/p>\ne.hash == hash && key.equals(e.key)<\/code><\/pre>\n\u4f46\u662f\u53ef\u80fd\u4e0d\u540c\u7684\u5143\u7d20hash\u503c\u4e0d\u4e00\u6837\uff0c\u7b97\u51fa\u7684index\u5374\u4e00\u6837\uff0c\u4f46\u662f\u53c8\u4e0d\u662f\u540c\u4e00\u4e2a\u5143\u7d20(\u8fd9\u5c31\u662f\u54c8\u5e0c\u78b0\u649e\u95ee\u9898\uff0c\u54c8\u5e0c\u7b97\u6cd5\u65e0\u6cd5\u9003\u907f\u8fd9\u4e2a\u95ee\u9898<\/strong>)\uff0c\u6570\u7ec4\u4e2d\u7684\u8fd9\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u5df2\u7ecf\u88ab\u5360\u636e\u4e86\uff0c\u90a3\u4e48\u6211\u600e\u4e48\u5b58\u50a8\u8fd9\u4e2a\u65b0\u7684\u5143\u7d20\u5462\uff1f\n\u8bf7\u770bHashMapEntry\u8fd9\u4e2a\u7c7b\uff1a\n\n\u518d\u770b\u6dfb\u52a0HashMapEntry\u7684\u65b9\u6cd5\uff1a<\/p>\nvoid addNewEntry(K key, V value, int hash, int index) {\n table[index] = new HashMapEntry(key, value, hash, table[index]);\n}\n\nHashMapEntry(K key, V value, int hash, HashMapEntry next) {\n this.key = key;\n this.value = value;\n this.hash = hash;\n this.next = next;\n }<\/code><\/pre>\n\n\u5bf9\u4e8eaddNewEntry\u65b9\u6cd5\n\u5982\u679cindex\u5904\u672c\u8eab\u6ca1\u6709\u5143\u7d20\u5360\u636e\uff0c\u6b64\u65f6table[index]\u5c31\u662fnull\u3002\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662fnull\uff1b<\/p>\n\u5982\u679cindex\u5904\u672c\u8eab\u6709\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u4e86\uff0c\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u7684\u5143\u7d20\u3002\u5934\u63d2\u6cd5\u5c31\u662f\u8fd9\u4e48\u6765\u7684\u3002<\/p>\nkey\u4e3anull\uff0cHashMap\u662f\u5355\u72ec\u7528\u4e00\u4e2aHashMapEntry\u53d8\u91cf\u6765\u5b58\u50a8\u7684\uff0c\u5e76\u4e0d\u662f\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\u6240\u6709\u7684\u589e\u5220\u6539\u67e5\n\u90fd\u662f\u5148\u5224\u65ad\u7684key\u662f\u5426\u4e3anull\u3002<\/p>\n<\/blockquote>\n\u5bf9\u4e8e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u4eba\u6765\u8bf4\uff0c\u5f97\u51fa\u4e0a\u9762\u7684\u7ed3\u8bba\u53ef\u80fd\u4e0d\u96be\u3002\u4f46\u662f\u5bf9\u4e8e\u975e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u6211\u6765\u8bf4\uff0c\u6162\u6162\u7684\u53d1\u73b0\u4e86\u6570\u636e\u7ed3\u6784\u4e4b\u7c7b\uff0c\u7b80\u76f4\u592a\u7f8e\u5999\u4e86\uff01<\/p>\n<\/li>\n\n\u54c8\u5e0c\u51b2\u7a81\nhttps:\/\/www.iteye.com\/blog\/xiaolu123456-1485349<\/a>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\n<\/li>\n\n\u5e76\u53d1\u5bfc\u81f4\u7684\u6b7b\u5faa\u73af\u95ee\u9898\nhttps:\/\/blog.csdn.net\/pange1991\/article\/details\/82377980<\/a>\nhttps:\/\/www.jianshu.com\/p\/61a829fa4e49<\/a><\/p>\n<\/li>\n<\/ul>\n<\/span>JDK1.8\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u77e5\u8bc6\u70b9\u9884\u5907-\u7ea2\u9ed1\u6811<\/a><\/span><\/h2>\nhttps:\/\/blog.csdn.net\/u010890358\/article\/details\/80496144<\/a> \uff08\u8be6\u7ec6\u89e3\u91ca\u6bcf\u884c\u4ee3\u7801\uff09<\/p>\nhttps:\/\/www.jianshu.com\/p\/400f3c019557<\/a><\/p>\n\u6536\u85cf <\/i><\/button>","protected":false},"excerpt":{"rendered":"\u4e0d\u540c\u7248\u672c\u7684JDK\u7684HashMap\u7684\u5e95\u5c42\u5b9e\u73b0\u5747\u6709\u6240\u4e0d\u540c \u76ee\u5f55 JDK\u5404\u4e2a\u7248\u672c\u7684\u6e90\u7801\u67e5\u770bHashMap\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[597],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7993"}],"version-history":[{"count":4,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions"}],"predecessor-version":[{"id":8000,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions\/8000"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7993"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
https:\/\/www.cnblogs.com\/xiaolovewei\/p\/7993521.html<\/a><\/p>\nhttps:\/\/www.cnblogs.com\/xiaozhongfeixiang\/archive\/2019\/09\/23\/11548563.html<\/a><\/p>\n\u9700\u8981\u6ce8\u610f\u7684\u70b9\uff1a<\/p>\n\n\n<\/span>key\u662f\u5982\u4f55\u8ba1\u7b97\u51fa\u6570\u7ec4\u7684\u4e0b\u6807\u7684<\/span><\/h2>\n\n\u54c8\u5e0c\u503c\u6c42\u6570\u7ec4\u4e0b\u6807<\/p>\nhash & (tab.length - 1);<\/code><\/pre>\n\u6269\u5bb9\u4e3a\u5565\u662f2\u7684\u500d\u6570\uff0c\u548c\u4e0a\u9762\u8fd9\u4e2a\u516c\u5f0f\u4e5f\u662f\u76f8\u5173\u7684\uff1ahttps:\/\/blog.csdn.net\/ptsx0607\/article\/details\/68945883<\/a>,\u4fdd\u8bc1\u4e86\u6563\u5217\u7684\u5747\u5300\u6027,\u54c8\u5e0c\u78b0\u649e\u7684\u673a\u7387\u5c31\u4f1a\u51cf\u5c0f\u3002<\/p>\n<\/li>\n\n<\/span>\u5934\u63d2\u6cd5\u4e0e\u94fe\u8868<\/span><\/h2>\nhttps:\/\/blog.csdn.net\/insomsia\/article\/details\/88367436<\/a>\n\u770bput\u65b9\u6cd5\uff1a<\/p>\n @Override public V put(K key, V value) {\n if (key == null) {\n return 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[…]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[597],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7993"}],"version-history":[{"count":4,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions"}],"predecessor-version":[{"id":8000,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions\/8000"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7993"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
https:\/\/www.cnblogs.com\/xiaozhongfeixiang\/archive\/2019\/09\/23\/11548563.html<\/a><\/p>\n\u9700\u8981\u6ce8\u610f\u7684\u70b9\uff1a<\/p>\n\n\n<\/span>key\u662f\u5982\u4f55\u8ba1\u7b97\u51fa\u6570\u7ec4\u7684\u4e0b\u6807\u7684<\/span><\/h2>\n\n\u54c8\u5e0c\u503c\u6c42\u6570\u7ec4\u4e0b\u6807<\/p>\nhash & (tab.length - 1);<\/code><\/pre>\n\u6269\u5bb9\u4e3a\u5565\u662f2\u7684\u500d\u6570\uff0c\u548c\u4e0a\u9762\u8fd9\u4e2a\u516c\u5f0f\u4e5f\u662f\u76f8\u5173\u7684\uff1ahttps:\/\/blog.csdn.net\/ptsx0607\/article\/details\/68945883<\/a>,\u4fdd\u8bc1\u4e86\u6563\u5217\u7684\u5747\u5300\u6027,\u54c8\u5e0c\u78b0\u649e\u7684\u673a\u7387\u5c31\u4f1a\u51cf\u5c0f\u3002<\/p>\n<\/li>\n\n<\/span>\u5934\u63d2\u6cd5\u4e0e\u94fe\u8868<\/span><\/h2>\nhttps:\/\/blog.csdn.net\/insomsia\/article\/details\/88367436<\/a>\n\u770bput\u65b9\u6cd5\uff1a<\/p>\n @Override public V put(K key, V value) {\n if (key == null) {\n return putValueForNullKey(value);\n }\n\n int hash = secondaryHash(key);\n HashMapEntry[] tab = table;\n int index = hash & (tab.length - 1);\n for (HashMapEntry e = tab[index]; e != null; e = e.next) {\n if (e.hash == hash && key.equals(e.key)) { \n preModify(e);\n V oldValue = e.value;\n e.value = value;\n return oldValue;\n }\n }\n\n \/\/ No entry for (non-null) key is present; create one\n modCount++;\n if (size++ > threshold) {\n tab = doubleCapacity();\n index = hash & (tab.length - 1);\n }\n addNewEntry(key, value, hash, index);\n return null;\n}\n<\/code><\/pre>\n\u91cd\u590d\u5143\u7d20\u5224\u65ad:hash\u76f8\u540c\uff0ckey\u76f8\u540c\u7684\u80af\u5b9a\u662f\u540c\u4e00\u4e2a\u5143\u7d20\u3002<\/strong><\/p>\ne.hash == hash && 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[…]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[597],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7993"}],"version-history":[{"count":4,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions"}],"predecessor-version":[{"id":8000,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions\/8000"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7993"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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}<\/code><\/pre>\n\n\u5bf9\u4e8eaddNewEntry\u65b9\u6cd5\n\u5982\u679cindex\u5904\u672c\u8eab\u6ca1\u6709\u5143\u7d20\u5360\u636e\uff0c\u6b64\u65f6table[index]\u5c31\u662fnull\u3002\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662fnull\uff1b<\/p>\n\u5982\u679cindex\u5904\u672c\u8eab\u6709\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u4e86\uff0c\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u7684\u5143\u7d20\u3002\u5934\u63d2\u6cd5\u5c31\u662f\u8fd9\u4e48\u6765\u7684\u3002<\/p>\nkey\u4e3anull\uff0cHashMap\u662f\u5355\u72ec\u7528\u4e00\u4e2aHashMapEntry\u53d8\u91cf\u6765\u5b58\u50a8\u7684\uff0c\u5e76\u4e0d\u662f\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\u6240\u6709\u7684\u589e\u5220\u6539\u67e5\n\u90fd\u662f\u5148\u5224\u65ad\u7684key\u662f\u5426\u4e3anull\u3002<\/p>\n<\/blockquote>\n\u5bf9\u4e8e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u4eba\u6765\u8bf4\uff0c\u5f97\u51fa\u4e0a\u9762\u7684\u7ed3\u8bba\u53ef\u80fd\u4e0d\u96be\u3002\u4f46\u662f\u5bf9\u4e8e\u975e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u6211\u6765\u8bf4\uff0c\u6162\u6162\u7684\u53d1\u73b0\u4e86\u6570\u636e\u7ed3\u6784\u4e4b\u7c7b\uff0c\u7b80\u76f4\u592a\u7f8e\u5999\u4e86\uff01<\/p>\n<\/li>\n\n\u54c8\u5e0c\u51b2\u7a81\nhttps:\/\/www.iteye.com\/blog\/xiaolu123456-1485349<\/a>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\n<\/li>\n\n\u5e76\u53d1\u5bfc\u81f4\u7684\u6b7b\u5faa\u73af\u95ee\u9898\nhttps:\/\/blog.csdn.net\/pange1991\/article\/details\/82377980<\/a>\nhttps:\/\/www.jianshu.com\/p\/61a829fa4e49<\/a><\/p>\n<\/li>\n<\/ul>\n<\/span>JDK1.8\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u77e5\u8bc6\u70b9\u9884\u5907-\u7ea2\u9ed1\u6811<\/a><\/span><\/h2>\nhttps:\/\/blog.csdn.net\/u010890358\/article\/details\/80496144<\/a> \uff08\u8be6\u7ec6\u89e3\u91ca\u6bcf\u884c\u4ee3\u7801\uff09<\/p>\nhttps:\/\/www.jianshu.com\/p\/400f3c019557<\/a><\/p>\n\u6536\u85cf <\/i><\/button>","protected":false},"excerpt":{"rendered":"\u4e0d\u540c\u7248\u672c\u7684JDK\u7684HashMap\u7684\u5e95\u5c42\u5b9e\u73b0\u5747\u6709\u6240\u4e0d\u540c \u76ee\u5f55 JDK\u5404\u4e2a\u7248\u672c\u7684\u6e90\u7801\u67e5\u770bHashMap\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[597],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7993"}],"version-history":[{"count":4,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions"}],"predecessor-version":[{"id":8000,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions\/8000"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7993"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
https:\/\/blog.csdn.net\/insomsia\/article\/details\/88367436<\/a>\n\u770bput\u65b9\u6cd5\uff1a<\/p>\n @Override public V put(K key, V value) {\n if (key == null) {\n return putValueForNullKey(value);\n }\n\n int hash = secondaryHash(key);\n HashMapEntry[] tab = table;\n int index = hash & (tab.length - 1);\n for (HashMapEntry e = tab[index]; e != null; e = e.next) {\n if (e.hash == hash && key.equals(e.key)) { \n preModify(e);\n V oldValue = e.value;\n e.value = value;\n return oldValue;\n }\n }\n\n \/\/ No entry for (non-null) key is present; create one\n modCount++;\n if (size++ > threshold) {\n tab = doubleCapacity();\n index = hash & (tab.length - 1);\n }\n addNewEntry(key, value, hash, index);\n return null;\n}\n<\/code><\/pre>\n\u91cd\u590d\u5143\u7d20\u5224\u65ad:hash\u76f8\u540c\uff0ckey\u76f8\u540c\u7684\u80af\u5b9a\u662f\u540c\u4e00\u4e2a\u5143\u7d20\u3002<\/strong><\/p>\ne.hash == hash && key.equals(e.key)<\/code><\/pre>\n\u4f46\u662f\u53ef\u80fd\u4e0d\u540c\u7684\u5143\u7d20hash\u503c\u4e0d\u4e00\u6837\uff0c\u7b97\u51fa\u7684index\u5374\u4e00\u6837\uff0c\u4f46\u662f\u53c8\u4e0d\u662f\u540c\u4e00\u4e2a\u5143\u7d20(\u8fd9\u5c31\u662f\u54c8\u5e0c\u78b0\u649e\u95ee\u9898\uff0c\u54c8\u5e0c\u7b97\u6cd5\u65e0\u6cd5\u9003\u907f\u8fd9\u4e2a\u95ee\u9898<\/strong>)\uff0c\u6570\u7ec4\u4e2d\u7684\u8fd9\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u5df2\u7ecf\u88ab\u5360\u636e\u4e86\uff0c\u90a3\u4e48\u6211\u600e\u4e48\u5b58\u50a8\u8fd9\u4e2a\u65b0\u7684\u5143\u7d20\u5462\uff1f\n\u8bf7\u770bHashMapEntry\u8fd9\u4e2a\u7c7b\uff1a\n\n\u518d\u770b\u6dfb\u52a0HashMapEntry\u7684\u65b9\u6cd5\uff1a<\/p>\nvoid addNewEntry(K key, V value, int hash, int index) {\n table[index] = new HashMapEntry(key, value, hash, table[index]);\n}\n\nHashMapEntry(K key, V value, int hash, HashMapEntry next) {\n this.key = key;\n this.value = value;\n this.hash = hash;\n this.next = next;\n }<\/code><\/pre>\n\n\u5bf9\u4e8eaddNewEntry\u65b9\u6cd5\n\u5982\u679cindex\u5904\u672c\u8eab\u6ca1\u6709\u5143\u7d20\u5360\u636e\uff0c\u6b64\u65f6table[index]\u5c31\u662fnull\u3002\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662fnull\uff1b<\/p>\n\u5982\u679cindex\u5904\u672c\u8eab\u6709\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u4e86\uff0c\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u7684\u5143\u7d20\u3002\u5934\u63d2\u6cd5\u5c31\u662f\u8fd9\u4e48\u6765\u7684\u3002<\/p>\nkey\u4e3anull\uff0cHashMap\u662f\u5355\u72ec\u7528\u4e00\u4e2aHashMapEntry\u53d8\u91cf\u6765\u5b58\u50a8\u7684\uff0c\u5e76\u4e0d\u662f\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\u6240\u6709\u7684\u589e\u5220\u6539\u67e5\n\u90fd\u662f\u5148\u5224\u65ad\u7684key\u662f\u5426\u4e3anull\u3002<\/p>\n<\/blockquote>\n\u5bf9\u4e8e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u4eba\u6765\u8bf4\uff0c\u5f97\u51fa\u4e0a\u9762\u7684\u7ed3\u8bba\u53ef\u80fd\u4e0d\u96be\u3002\u4f46\u662f\u5bf9\u4e8e\u975e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u6211\u6765\u8bf4\uff0c\u6162\u6162\u7684\u53d1\u73b0\u4e86\u6570\u636e\u7ed3\u6784\u4e4b\u7c7b\uff0c\u7b80\u76f4\u592a\u7f8e\u5999\u4e86\uff01<\/p>\n<\/li>\n\n\u54c8\u5e0c\u51b2\u7a81\nhttps:\/\/www.iteye.com\/blog\/xiaolu123456-1485349<\/a>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\n<\/li>\n\n\u5e76\u53d1\u5bfc\u81f4\u7684\u6b7b\u5faa\u73af\u95ee\u9898\nhttps:\/\/blog.csdn.net\/pange1991\/article\/details\/82377980<\/a>\nhttps:\/\/www.jianshu.com\/p\/61a829fa4e49<\/a><\/p>\n<\/li>\n<\/ul>\n<\/span>JDK1.8\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u77e5\u8bc6\u70b9\u9884\u5907-\u7ea2\u9ed1\u6811<\/a><\/span><\/h2>\nhttps:\/\/blog.csdn.net\/u010890358\/article\/details\/80496144<\/a> \uff08\u8be6\u7ec6\u89e3\u91ca\u6bcf\u884c\u4ee3\u7801\uff09<\/p>\nhttps:\/\/www.jianshu.com\/p\/400f3c019557<\/a><\/p>\n\u6536\u85cf <\/i><\/button>","protected":false},"excerpt":{"rendered":"\u4e0d\u540c\u7248\u672c\u7684JDK\u7684HashMap\u7684\u5e95\u5c42\u5b9e\u73b0\u5747\u6709\u6240\u4e0d\u540c \u76ee\u5f55 JDK\u5404\u4e2a\u7248\u672c\u7684\u6e90\u7801\u67e5\u770bHashMap\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[597],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7993"}],"version-history":[{"count":4,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions"}],"predecessor-version":[{"id":8000,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions\/8000"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7993"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
@Override public V put(K key, V value) {\n if (key == null) {\n return putValueForNullKey(value);\n }\n\n int hash = secondaryHash(key);\n HashMapEntry[] tab = table;\n int index = hash & (tab.length - 1);\n for (HashMapEntry e = tab[index]; e != null; e = e.next) {\n if (e.hash == hash && key.equals(e.key)) { \n preModify(e);\n V oldValue = e.value;\n e.value = value;\n return oldValue;\n }\n }\n\n \/\/ No entry for (non-null) key is present; create one\n modCount++;\n if (size++ > threshold) {\n tab = doubleCapacity();\n index = hash & (tab.length - 1);\n }\n addNewEntry(key, value, hash, index);\n return null;\n}\n<\/code><\/pre>\n\u91cd\u590d\u5143\u7d20\u5224\u65ad:hash\u76f8\u540c\uff0ckey\u76f8\u540c\u7684\u80af\u5b9a\u662f\u540c\u4e00\u4e2a\u5143\u7d20\u3002<\/strong><\/p>\ne.hash == hash && key.equals(e.key)<\/code><\/pre>\n\u4f46\u662f\u53ef\u80fd\u4e0d\u540c\u7684\u5143\u7d20hash\u503c\u4e0d\u4e00\u6837\uff0c\u7b97\u51fa\u7684index\u5374\u4e00\u6837\uff0c\u4f46\u662f\u53c8\u4e0d\u662f\u540c\u4e00\u4e2a\u5143\u7d20(\u8fd9\u5c31\u662f\u54c8\u5e0c\u78b0\u649e\u95ee\u9898\uff0c\u54c8\u5e0c\u7b97\u6cd5\u65e0\u6cd5\u9003\u907f\u8fd9\u4e2a\u95ee\u9898<\/strong>)\uff0c\u6570\u7ec4\u4e2d\u7684\u8fd9\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u5df2\u7ecf\u88ab\u5360\u636e\u4e86\uff0c\u90a3\u4e48\u6211\u600e\u4e48\u5b58\u50a8\u8fd9\u4e2a\u65b0\u7684\u5143\u7d20\u5462\uff1f\n\u8bf7\u770bHashMapEntry\u8fd9\u4e2a\u7c7b\uff1a\n\n\u518d\u770b\u6dfb\u52a0HashMapEntry\u7684\u65b9\u6cd5\uff1a<\/p>\nvoid addNewEntry(K key, V value, int hash, int index) {\n table[index] = new HashMapEntry(key, value, hash, table[index]);\n}\n\nHashMapEntry(K key, V value, int hash, HashMapEntry next) {\n this.key = key;\n this.value = value;\n this.hash = hash;\n this.next = next;\n }<\/code><\/pre>\n\n\u5bf9\u4e8eaddNewEntry\u65b9\u6cd5\n\u5982\u679cindex\u5904\u672c\u8eab\u6ca1\u6709\u5143\u7d20\u5360\u636e\uff0c\u6b64\u65f6table[index]\u5c31\u662fnull\u3002\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662fnull\uff1b<\/p>\n\u5982\u679cindex\u5904\u672c\u8eab\u6709\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u4e86\uff0c\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u7684\u5143\u7d20\u3002\u5934\u63d2\u6cd5\u5c31\u662f\u8fd9\u4e48\u6765\u7684\u3002<\/p>\nkey\u4e3anull\uff0cHashMap\u662f\u5355\u72ec\u7528\u4e00\u4e2aHashMapEntry\u53d8\u91cf\u6765\u5b58\u50a8\u7684\uff0c\u5e76\u4e0d\u662f\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\u6240\u6709\u7684\u589e\u5220\u6539\u67e5\n\u90fd\u662f\u5148\u5224\u65ad\u7684key\u662f\u5426\u4e3anull\u3002<\/p>\n<\/blockquote>\n\u5bf9\u4e8e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u4eba\u6765\u8bf4\uff0c\u5f97\u51fa\u4e0a\u9762\u7684\u7ed3\u8bba\u53ef\u80fd\u4e0d\u96be\u3002\u4f46\u662f\u5bf9\u4e8e\u975e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u6211\u6765\u8bf4\uff0c\u6162\u6162\u7684\u53d1\u73b0\u4e86\u6570\u636e\u7ed3\u6784\u4e4b\u7c7b\uff0c\u7b80\u76f4\u592a\u7f8e\u5999\u4e86\uff01<\/p>\n<\/li>\n\n\u54c8\u5e0c\u51b2\u7a81\nhttps:\/\/www.iteye.com\/blog\/xiaolu123456-1485349<\/a>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\n<\/li>\n\n\u5e76\u53d1\u5bfc\u81f4\u7684\u6b7b\u5faa\u73af\u95ee\u9898\nhttps:\/\/blog.csdn.net\/pange1991\/article\/details\/82377980<\/a>\nhttps:\/\/www.jianshu.com\/p\/61a829fa4e49<\/a><\/p>\n<\/li>\n<\/ul>\n<\/span>JDK1.8\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u77e5\u8bc6\u70b9\u9884\u5907-\u7ea2\u9ed1\u6811<\/a><\/span><\/h2>\nhttps:\/\/blog.csdn.net\/u010890358\/article\/details\/80496144<\/a> \uff08\u8be6\u7ec6\u89e3\u91ca\u6bcf\u884c\u4ee3\u7801\uff09<\/p>\nhttps:\/\/www.jianshu.com\/p\/400f3c019557<\/a><\/p>\n\u6536\u85cf <\/i><\/button>","protected":false},"excerpt":{"rendered":"\u4e0d\u540c\u7248\u672c\u7684JDK\u7684HashMap\u7684\u5e95\u5c42\u5b9e\u73b0\u5747\u6709\u6240\u4e0d\u540c \u76ee\u5f55 JDK\u5404\u4e2a\u7248\u672c\u7684\u6e90\u7801\u67e5\u770bHashMap\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[597],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7993"}],"version-history":[{"count":4,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions"}],"predecessor-version":[{"id":8000,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions\/8000"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7993"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\u91cd\u590d\u5143\u7d20\u5224\u65ad:hash\u76f8\u540c\uff0ckey\u76f8\u540c\u7684\u80af\u5b9a\u662f\u540c\u4e00\u4e2a\u5143\u7d20\u3002<\/strong><\/p>\ne.hash == hash && key.equals(e.key)<\/code><\/pre>\n\u4f46\u662f\u53ef\u80fd\u4e0d\u540c\u7684\u5143\u7d20hash\u503c\u4e0d\u4e00\u6837\uff0c\u7b97\u51fa\u7684index\u5374\u4e00\u6837\uff0c\u4f46\u662f\u53c8\u4e0d\u662f\u540c\u4e00\u4e2a\u5143\u7d20(\u8fd9\u5c31\u662f\u54c8\u5e0c\u78b0\u649e\u95ee\u9898\uff0c\u54c8\u5e0c\u7b97\u6cd5\u65e0\u6cd5\u9003\u907f\u8fd9\u4e2a\u95ee\u9898<\/strong>)\uff0c\u6570\u7ec4\u4e2d\u7684\u8fd9\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u5df2\u7ecf\u88ab\u5360\u636e\u4e86\uff0c\u90a3\u4e48\u6211\u600e\u4e48\u5b58\u50a8\u8fd9\u4e2a\u65b0\u7684\u5143\u7d20\u5462\uff1f\n\u8bf7\u770bHashMapEntry\u8fd9\u4e2a\u7c7b\uff1a\n\n\u518d\u770b\u6dfb\u52a0HashMapEntry\u7684\u65b9\u6cd5\uff1a<\/p>\nvoid addNewEntry(K key, V value, int hash, int index) {\n table[index] = new HashMapEntry(key, value, hash, table[index]);\n}\n\nHashMapEntry(K key, V value, int hash, HashMapEntry next) {\n this.key = key;\n this.value = value;\n this.hash = hash;\n this.next = next;\n }<\/code><\/pre>\n\n\u5bf9\u4e8eaddNewEntry\u65b9\u6cd5\n\u5982\u679cindex\u5904\u672c\u8eab\u6ca1\u6709\u5143\u7d20\u5360\u636e\uff0c\u6b64\u65f6table[index]\u5c31\u662fnull\u3002\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662fnull\uff1b<\/p>\n\u5982\u679cindex\u5904\u672c\u8eab\u6709\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u4e86\uff0c\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u7684\u5143\u7d20\u3002\u5934\u63d2\u6cd5\u5c31\u662f\u8fd9\u4e48\u6765\u7684\u3002<\/p>\nkey\u4e3anull\uff0cHashMap\u662f\u5355\u72ec\u7528\u4e00\u4e2aHashMapEntry\u53d8\u91cf\u6765\u5b58\u50a8\u7684\uff0c\u5e76\u4e0d\u662f\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\u6240\u6709\u7684\u589e\u5220\u6539\u67e5\n\u90fd\u662f\u5148\u5224\u65ad\u7684key\u662f\u5426\u4e3anull\u3002<\/p>\n<\/blockquote>\n\u5bf9\u4e8e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u4eba\u6765\u8bf4\uff0c\u5f97\u51fa\u4e0a\u9762\u7684\u7ed3\u8bba\u53ef\u80fd\u4e0d\u96be\u3002\u4f46\u662f\u5bf9\u4e8e\u975e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u6211\u6765\u8bf4\uff0c\u6162\u6162\u7684\u53d1\u73b0\u4e86\u6570\u636e\u7ed3\u6784\u4e4b\u7c7b\uff0c\u7b80\u76f4\u592a\u7f8e\u5999\u4e86\uff01<\/p>\n<\/li>\n\n\u54c8\u5e0c\u51b2\u7a81\nhttps:\/\/www.iteye.com\/blog\/xiaolu123456-1485349<\/a>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\n<\/li>\n\n\u5e76\u53d1\u5bfc\u81f4\u7684\u6b7b\u5faa\u73af\u95ee\u9898\nhttps:\/\/blog.csdn.net\/pange1991\/article\/details\/82377980<\/a>\nhttps:\/\/www.jianshu.com\/p\/61a829fa4e49<\/a><\/p>\n<\/li>\n<\/ul>\n<\/span>JDK1.8\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u77e5\u8bc6\u70b9\u9884\u5907-\u7ea2\u9ed1\u6811<\/a><\/span><\/h2>\nhttps:\/\/blog.csdn.net\/u010890358\/article\/details\/80496144<\/a> \uff08\u8be6\u7ec6\u89e3\u91ca\u6bcf\u884c\u4ee3\u7801\uff09<\/p>\nhttps:\/\/www.jianshu.com\/p\/400f3c019557<\/a><\/p>\n\u6536\u85cf <\/i><\/button>","protected":false},"excerpt":{"rendered":"\u4e0d\u540c\u7248\u672c\u7684JDK\u7684HashMap\u7684\u5e95\u5c42\u5b9e\u73b0\u5747\u6709\u6240\u4e0d\u540c \u76ee\u5f55 JDK\u5404\u4e2a\u7248\u672c\u7684\u6e90\u7801\u67e5\u770bHashMap\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[597],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7993"}],"version-history":[{"count":4,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions"}],"predecessor-version":[{"id":8000,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions\/8000"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7993"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
e.hash == hash && key.equals(e.key)<\/code><\/pre>\n\u4f46\u662f\u53ef\u80fd\u4e0d\u540c\u7684\u5143\u7d20hash\u503c\u4e0d\u4e00\u6837\uff0c\u7b97\u51fa\u7684index\u5374\u4e00\u6837\uff0c\u4f46\u662f\u53c8\u4e0d\u662f\u540c\u4e00\u4e2a\u5143\u7d20(\u8fd9\u5c31\u662f\u54c8\u5e0c\u78b0\u649e\u95ee\u9898\uff0c\u54c8\u5e0c\u7b97\u6cd5\u65e0\u6cd5\u9003\u907f\u8fd9\u4e2a\u95ee\u9898<\/strong>)\uff0c\u6570\u7ec4\u4e2d\u7684\u8fd9\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u5df2\u7ecf\u88ab\u5360\u636e\u4e86\uff0c\u90a3\u4e48\u6211\u600e\u4e48\u5b58\u50a8\u8fd9\u4e2a\u65b0\u7684\u5143\u7d20\u5462\uff1f\n\u8bf7\u770bHashMapEntry\u8fd9\u4e2a\u7c7b\uff1a\n\n\u518d\u770b\u6dfb\u52a0HashMapEntry\u7684\u65b9\u6cd5\uff1a<\/p>\nvoid addNewEntry(K key, V value, int hash, int index) {\n table[index] = new HashMapEntry(key, value, hash, table[index]);\n}\n\nHashMapEntry(K key, V value, int hash, HashMapEntry next) {\n this.key = key;\n this.value = value;\n this.hash = hash;\n this.next = next;\n }<\/code><\/pre>\n\n\u5bf9\u4e8eaddNewEntry\u65b9\u6cd5\n\u5982\u679cindex\u5904\u672c\u8eab\u6ca1\u6709\u5143\u7d20\u5360\u636e\uff0c\u6b64\u65f6table[index]\u5c31\u662fnull\u3002\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662fnull\uff1b<\/p>\n\u5982\u679cindex\u5904\u672c\u8eab\u6709\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u4e86\uff0c\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u7684\u5143\u7d20\u3002\u5934\u63d2\u6cd5\u5c31\u662f\u8fd9\u4e48\u6765\u7684\u3002<\/p>\nkey\u4e3anull\uff0cHashMap\u662f\u5355\u72ec\u7528\u4e00\u4e2aHashMapEntry\u53d8\u91cf\u6765\u5b58\u50a8\u7684\uff0c\u5e76\u4e0d\u662f\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\u6240\u6709\u7684\u589e\u5220\u6539\u67e5\n\u90fd\u662f\u5148\u5224\u65ad\u7684key\u662f\u5426\u4e3anull\u3002<\/p>\n<\/blockquote>\n\u5bf9\u4e8e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u4eba\u6765\u8bf4\uff0c\u5f97\u51fa\u4e0a\u9762\u7684\u7ed3\u8bba\u53ef\u80fd\u4e0d\u96be\u3002\u4f46\u662f\u5bf9\u4e8e\u975e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u6211\u6765\u8bf4\uff0c\u6162\u6162\u7684\u53d1\u73b0\u4e86\u6570\u636e\u7ed3\u6784\u4e4b\u7c7b\uff0c\u7b80\u76f4\u592a\u7f8e\u5999\u4e86\uff01<\/p>\n<\/li>\n\n\u54c8\u5e0c\u51b2\u7a81\nhttps:\/\/www.iteye.com\/blog\/xiaolu123456-1485349<\/a>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\n<\/li>\n\n\u5e76\u53d1\u5bfc\u81f4\u7684\u6b7b\u5faa\u73af\u95ee\u9898\nhttps:\/\/blog.csdn.net\/pange1991\/article\/details\/82377980<\/a>\nhttps:\/\/www.jianshu.com\/p\/61a829fa4e49<\/a><\/p>\n<\/li>\n<\/ul>\n<\/span>JDK1.8\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u77e5\u8bc6\u70b9\u9884\u5907-\u7ea2\u9ed1\u6811<\/a><\/span><\/h2>\nhttps:\/\/blog.csdn.net\/u010890358\/article\/details\/80496144<\/a> \uff08\u8be6\u7ec6\u89e3\u91ca\u6bcf\u884c\u4ee3\u7801\uff09<\/p>\nhttps:\/\/www.jianshu.com\/p\/400f3c019557<\/a><\/p>\n\u6536\u85cf <\/i><\/button>","protected":false},"excerpt":{"rendered":"\u4e0d\u540c\u7248\u672c\u7684JDK\u7684HashMap\u7684\u5e95\u5c42\u5b9e\u73b0\u5747\u6709\u6240\u4e0d\u540c \u76ee\u5f55 JDK\u5404\u4e2a\u7248\u672c\u7684\u6e90\u7801\u67e5\u770bHashMap\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[597],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7993"}],"version-history":[{"count":4,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions"}],"predecessor-version":[{"id":8000,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions\/8000"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7993"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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void addNewEntry(K key, V value, int hash, int index) {\n table[index] = new HashMapEntry(key, value, hash, table[index]);\n}\n\nHashMapEntry(K key, V value, int hash, HashMapEntry next) {\n this.key = key;\n this.value = value;\n this.hash = hash;\n this.next = next;\n }<\/code><\/pre>\n\n\u5bf9\u4e8eaddNewEntry\u65b9\u6cd5\n\u5982\u679cindex\u5904\u672c\u8eab\u6ca1\u6709\u5143\u7d20\u5360\u636e\uff0c\u6b64\u65f6table[index]\u5c31\u662fnull\u3002\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662fnull\uff1b<\/p>\n\u5982\u679cindex\u5904\u672c\u8eab\u6709\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u4e86\uff0c\n\u90a3\u4e48\u76f4\u63a5\u5c31\u6dfb\u52a0\u4e00\u4e2aHashMapEntry\u5143\u7d20\uff0c\u5b83\u7684next\u6307\u9488\u6307\u5411\u539f\u6765Index\u4f4d\u7f6e\u7684\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u54c8\u5e0c\u51b2\u7a81\u7684\u5143\u7d20\u3002\u5934\u63d2\u6cd5\u5c31\u662f\u8fd9\u4e48\u6765\u7684\u3002<\/p>\nkey\u4e3anull\uff0cHashMap\u662f\u5355\u72ec\u7528\u4e00\u4e2aHashMapEntry\u53d8\u91cf\u6765\u5b58\u50a8\u7684\uff0c\u5e76\u4e0d\u662f\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\u6240\u6709\u7684\u589e\u5220\u6539\u67e5\n\u90fd\u662f\u5148\u5224\u65ad\u7684key\u662f\u5426\u4e3anull\u3002<\/p>\n<\/blockquote>\n\u5bf9\u4e8e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u4eba\u6765\u8bf4\uff0c\u5f97\u51fa\u4e0a\u9762\u7684\u7ed3\u8bba\u53ef\u80fd\u4e0d\u96be\u3002\u4f46\u662f\u5bf9\u4e8e\u975e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u6211\u6765\u8bf4\uff0c\u6162\u6162\u7684\u53d1\u73b0\u4e86\u6570\u636e\u7ed3\u6784\u4e4b\u7c7b\uff0c\u7b80\u76f4\u592a\u7f8e\u5999\u4e86\uff01<\/p>\n<\/li>\n\n\u54c8\u5e0c\u51b2\u7a81\nhttps:\/\/www.iteye.com\/blog\/xiaolu123456-1485349<\/a>\nhttps:\/\/www.nowcoder.com\/discuss\/151172<\/a><\/p>\n<\/li>\n\n\u5e76\u53d1\u5bfc\u81f4\u7684\u6b7b\u5faa\u73af\u95ee\u9898\nhttps:\/\/blog.csdn.net\/pange1991\/article\/details\/82377980<\/a>\nhttps:\/\/www.jianshu.com\/p\/61a829fa4e49<\/a><\/p>\n<\/li>\n<\/ul>\n<\/span>JDK1.8\u6e90\u7801\u5206\u6790<\/span><\/h1>\n<\/span>\u77e5\u8bc6\u70b9\u9884\u5907-\u7ea2\u9ed1\u6811<\/a><\/span><\/h2>\nhttps:\/\/blog.csdn.net\/u010890358\/article\/details\/80496144<\/a> \uff08\u8be6\u7ec6\u89e3\u91ca\u6bcf\u884c\u4ee3\u7801\uff09<\/p>\nhttps:\/\/www.jianshu.com\/p\/400f3c019557<\/a><\/p>\n\u6536\u85cf <\/i><\/button>","protected":false},"excerpt":{"rendered":"\u4e0d\u540c\u7248\u672c\u7684JDK\u7684HashMap\u7684\u5e95\u5c42\u5b9e\u73b0\u5747\u6709\u6240\u4e0d\u540c \u76ee\u5f55 JDK\u5404\u4e2a\u7248\u672c\u7684\u6e90\u7801\u67e5\u770bHashMap\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[597],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7993"}],"version-history":[{"count":4,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions"}],"predecessor-version":[{"id":8000,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7993\/revisions\/8000"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7993"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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