{"id":1702,"date":"2021-01-09T13:30:58","date_gmt":"2021-01-09T05:30:58","guid":{"rendered":"http:\/\/122.152.205.50\/wordpress\/?p=1702"},"modified":"2023-12-15T11:08:04","modified_gmt":"2023-12-15T03:08:04","slug":"%e4%bd%8d%e8%bf%90%e7%ae%97","status":"publish","type":"post","link":"http:\/\/xinyiworld.top\/wordpress_it\/?p=1702","title":{"rendered":"\u4f4d\u8fd0\u7b97"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_16 counter-hierarchy counter-decimal ez-toc-grey\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">\u76ee\u5f55<\/p>\n<span class=\"ez-toc-title-toggle\"><a class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><i class=\"ez-toc-glyphicon ez-toc-icon-toggle\"><\/i><\/a><\/span><\/div>\n<nav><ul class=\"ez-toc-list ez-toc-list-level-1\"><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-1\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=1702\/#1%E9%80%BB%E8%BE%91%E5%8F%B3%E7%A7%BB%E4%B8%8E%E7%AE%97%E6%9C%AF%E5%8F%B3%E7%A7%BB%E7%9A%84%E5%8C%BA%E5%88%AB\" title=\"1.\u903b\u8f91\u53f3\u79fb\u4e0e\u7b97\u672f\u53f3\u79fb\u7684\u533a\u522b\">1.\u903b\u8f91\u53f3\u79fb\u4e0e\u7b97\u672f\u53f3\u79fb\u7684\u533a\u522b<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-2\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=1702\/#2%E4%BD%8D%E5%90%91%E9%87%8F\" title=\"2.\u4f4d\u5411\u91cf\">2.\u4f4d\u5411\u91cf<\/a><ul class=\"ez-toc-list-level-3\"><li class=\"ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-3\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=1702\/#%E4%BD%8D%E5%90%91%E9%87%8F%E5%BA%94%E7%94%A81%EF%BC%9A%E8%A1%A8%E7%A4%BA%E6%9C%89%E9%99%90%E9%9B%86%E5%90%88\" title=\"\u4f4d\u5411\u91cf\u5e94\u75281\uff1a\u8868\u793a\u6709\u9650\u96c6\u5408\">\u4f4d\u5411\u91cf\u5e94\u75281\uff1a\u8868\u793a\u6709\u9650\u96c6\u5408<\/a><\/li><\/ul><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-4\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=1702\/#3Java%E4%BD%8D%E8%BF%90%E7%AE%97\" title=\"3.Java\u4f4d\u8fd0\u7b97\">3.Java\u4f4d\u8fd0\u7b97<\/a><ul class=\"ez-toc-list-level-3\"><li class=\"ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-5\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=1702\/#%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF%EF%BC%9A\" title=\"\u5e94\u7528\u573a\u666f\uff1a\">\u5e94\u7528\u573a\u666f\uff1a<\/a><ul class=\"ez-toc-list-level-4\"><li class=\"ez-toc-heading-level-4\"><a class=\"ez-toc-link ez-toc-heading-6\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=1702\/#1%EF%BC%89%E5%88%A4%E6%96%AD%E5%A5%87%E5%81%B6%E6%80%A7\" title=\"1\uff09\u5224\u65ad\u5947\u5076\u6027\">1\uff09\u5224\u65ad\u5947\u5076\u6027<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-4\"><a class=\"ez-toc-link ez-toc-heading-7\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=1702\/#2%EF%BC%89%E4%B8%8D%E4%BD%BF%E7%94%A8%E4%B8%AD%E9%97%B4%E5%8F%98%E9%87%8F%E4%BA%A4%E6%8D%A2%E4%B8%A4%E4%B8%AA%E6%95%B0\" title=\"2\uff09\u4e0d\u4f7f\u7528\u4e2d\u95f4\u53d8\u91cf\u4ea4\u6362\u4e24\u4e2a\u6570\">2\uff09\u4e0d\u4f7f\u7528\u4e2d\u95f4\u53d8\u91cf\u4ea4\u6362\u4e24\u4e2a\u6570<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-4\"><a class=\"ez-toc-link ez-toc-heading-8\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=1702\/#3%EF%BC%89_%E5%88%A4%E6%96%AD%E4%B8%80%E4%B8%AA%E6%AD%A3%E6%95%B4%E6%95%B0%E6%98%AF%E4%B8%8D%E6%98%AF2%E7%9A%84%E6%95%B4%E6%95%B0%E6%AC%A1%E5%B9%82\" title=\"3\uff09 \u5224\u65ad\u4e00\u4e2a\u6b63\u6574\u6570\u662f\u4e0d\u662f2\u7684\u6574\u6570\u6b21\u5e42\">3\uff09 \u5224\u65ad\u4e00\u4e2a\u6b63\u6574\u6570\u662f\u4e0d\u662f2\u7684\u6574\u6570\u6b21\u5e42<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-4\"><a class=\"ez-toc-link ez-toc-heading-9\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=1702\/#4%EF%BC%89_%E6%8E%A9%E7%A0%81%E8%BF%90%E7%AE%97\" title=\"4\uff09 \u63a9\u7801\u8fd0\u7b97\">4\uff09 \u63a9\u7801\u8fd0\u7b97<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"1%E9%80%BB%E8%BE%91%E5%8F%B3%E7%A7%BB%E4%B8%8E%E7%AE%97%E6%9C%AF%E5%8F%B3%E7%A7%BB%E7%9A%84%E5%8C%BA%E5%88%AB\"><\/span>1.\u903b\u8f91\u53f3\u79fb\u4e0e\u7b97\u672f\u53f3\u79fb\u7684\u533a\u522b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a href=\"https:\/\/www.cnblogs.com\/zouhong\/p\/13526845.html\">https:\/\/www.cnblogs.com\/zouhong\/p\/13526845.html<\/a><\/p>\n<p>\u903b\u8f91\u53f3\u79fb\u5c31\u662f\u4e0d\u8003\u8651\u7b26\u53f7bai\u4f4d\uff0c\u53f3\u79fb\u4e00\u4f4ddu\uff0c\u5de6\u8fb9\u8865\u96f6\u5373\u53ef\u3002<br \/>\n\u7b97\u672f\u53f3\u79fb\u9700\u8981\u8003zhi\u8651\u7b26\u53f7\u4f4d\uff0cdao\u53f3\u79fb\u4e00\u4f4d\uff0c\u82e5\u7b26\u53f7\u4f4d\u4e3a1\uff0c\u5c31\u5728\u5de6\u8fb9\u88651\uff1b\u5426\u5219\uff0c\u5c31\u88650\u3002<br \/>\n\u6240\u4ee5\u7b97\u672f\u53f3\u79fb\u4e5f\u53ef\u4ee5\u8fdb\u884c\u6709\u7b26\u53f7\u4f4d\u7684\u9664\u6cd5\uff0c\u53f3\u79fb,n\u4f4d\u5c31\u7b49\u4e8e\u96642\u7684n\u6b21\u65b9\u3002<br \/>\n\u4f8b\u5982\uff0c8\u4f4d\u4e8c\u8fdb\u5236\u657011001101\u5206\u522b\u53f3\u79fb\u4e00\u4f4d\u3002<br \/>\n\u903b\u8f91\u53f3\u79fb\u5c31\u662f[0]1100110<br \/>\n\u7b97\u672f\u53f3\u79fb\u5c31\u662f[1]1100110<\/p>\n<p>\u4e0eC\u76f8\u6bd4\uff0c Java \u5bf9\u4e8e\u5982\u4f55\u8fdb\u884c\u53f3\u79fb\u6709\u660e\u786e\u7684\u5b9a\u4e49\u3002\u8868\u8fbe\u662f x&gt;&gt;k \u4f1a\u5c06 \u7b97\u672f\u53f3\u79fb \u4f4d\u7f6e\uff0c\u800c x&gt;&gt;&gt;k \u4f1a\u5bf9 \u505a\u903b\u8f91\u53f3\u79fb\u3002 \uff08\u5f85\u9a8c\u8bc1\uff09<\/p>\n<h2><span class=\"ez-toc-section\" id=\"2%E4%BD%8D%E5%90%91%E9%87%8F\"><\/span>2.\u4f4d\u5411\u91cf<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u6982\u5ff5\uff1a\u4f4d\u5411\u91cf\u5c31\u662f\u56fa\u5b9a\u957f\u5ea6\u4e3aw \u3001\u75310\u548c1\u7ec4\u6210\u7684\u4e32\u3002\u4f4d\u5411\u91cf\u7684\u8fd0\u7b97\u53ef\u4ee5\u5b9a\u4e49\u6210\u53c2\u6570\u7684\u6bcf\u4e2a\u5bf9\u5e94\u5143\u7d20\u4e4b\u95f4\u7684\u8fd0\u7b97\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E4%BD%8D%E5%90%91%E9%87%8F%E5%BA%94%E7%94%A81%EF%BC%9A%E8%A1%A8%E7%A4%BA%E6%9C%89%E9%99%90%E9%9B%86%E5%90%88\"><\/span>\u4f4d\u5411\u91cf\u5e94\u75281\uff1a\u8868\u793a\u6709\u9650\u96c6\u5408<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u5e03\u5c14\u8fd0\u7b97|\u548c\uff06\u5206\u522b\u5bf9\u5e94\u5343\u96c6\u5408\u7684\u5e76\u548c\u4ea4\uff0c\u800c\uff5e\u5bf9\u5e94\u4e8e\u96c6\u5408\u7684\u8865\u3002<\/p>\n<p><a href=\"https:\/\/www.zhihu.com\/question\/37526794\">https:\/\/www.zhihu.com\/question\/37526794<\/a><\/p>\n<p>\u6bd4\u5982 a=[01101001]\uff0c\u4ece\u53f3\u8fb9\u6570\u8d77\uff0c\u7b2c0\u30013\u30015\u30016\u4f4d\u662f1\uff0c\u6240\u4ee5\u5c31\u8868\u793a\u4e860\u30013\u30015\u30016\u8fd94\u4e2a\u6570\uff0cb\u7684\u8bdd\u540c\u7406\uff0c\u5bf9\u5e94\u7684\u662f0\u30012\u30014\u30016\u8fd94\u4e2a\u6570\u3002\u8fd0\u7b97 a&amp;b \u5f97\u5230\u4f4d\u5411\u91cf [01000001], \u800cAnB={0, 6}<\/p>\n<h2><span class=\"ez-toc-section\" id=\"3Java%E4%BD%8D%E8%BF%90%E7%AE%97\"><\/span>3.Java\u4f4d\u8fd0\u7b97<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a href=\"https:\/\/blog.csdn.net\/weixin_37490221\/article\/details\/90905087\">https:\/\/blog.csdn.net\/weixin_37490221\/article\/details\/90905087<\/a><\/p>\n<p>Java\u5b9a\u4e49\u4e86\u4f4d\u8fd0\u7b97\u7b26\uff0c\u5e94\u7528\u4e8e\u6574\u6570\u7c7b\u578b(int)\uff0c\u957f\u6574\u578b(long)\uff0c\u77ed\u6574\u578b(short)\uff0c\u5b57\u7b26\u578b(char)\uff0c\u548c\u5b57\u8282\u7c7b\u578b(byte)\u7b49\u7c7b\u578b\u3002<\/p>\n<p>Java\u5305\u542b\u4e86\u4e03\u79cd\u4f4d\u8fd0\u7b97\u7b26<\/p>\n<table>\n<thead>\n<tr>\n<th>\u4f4d\u8fd0\u7b97\u7b26<\/th>\n<th>\u8bf4\u660e<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>&gt;&gt;<\/td>\n<td><strong>\u53f3\u79fb<\/strong>\u8fd0\u7b97\u7b26\uff0c\u7b26\u53f7\u5de6\u4fa7\u6570\u503c <strong>\u6309\u4f4d\u53f3\u79fb<\/strong> \u7b26\u53f7\u53f3\u4fa7\u6570\u503c\u6307\u5b9a\u7684\u4f4d\u6570\uff0c<strong>\u82e5\u4e3a\u6b63\u6570\u5219\u9ad8\u4f4d\u88650\uff0c\u82e5\u4e3a\u8d1f\u6570\u5219\u9ad8\u4f4d\u88651<\/strong><\/td>\n<\/tr>\n<tr>\n<td>&lt;&lt;<\/td>\n<td><strong>\u5de6\u79fb<\/strong>\u8fd0\u7b97\u7b26\uff0c\u7b26\u53f7\u5de6\u4fa7\u6570\u503c <strong>\u6309\u4f4d\u5de6\u79fb<\/strong> \u7b26\u53f7\u53f3\u4fa7\u6570\u503c\u6307\u5b9a\u7684\u4f4d\u6570\uff0c\u5e76<strong>\u5728\u4f4e\u4f4d\u5904\u88650<\/strong><\/td>\n<\/tr>\n<tr>\n<td>&gt;&gt;&gt;<\/td>\n<td><strong>\u65e0\u7b26\u53f7\u53f3\u79fb<\/strong>\u8fd0\u7b97\u7b26\uff0c\u7b26\u53f7\u5de6\u4fa7\u6570\u503c <strong>\u6309\u4f4d\u53f3\u79fb<\/strong> \u7b26\u53f7\u53f3\u4fa7\u6570\u503c\u6307\u5b9a\u7684\u4f4d\u6570\uff0c<strong>\u65e0\u8bba\u6b63\u8d1f\u9ad8\u4f4d\u88650<\/strong><\/td>\n<\/tr>\n<tr>\n<td>&amp;<\/td>\n<td><strong>\u4e0e<\/strong>(<strong>AND<\/strong>)\u8fd0\u7b97\u7b26\uff0c\u5bf9\u4e24\u4e2a\u6574\u578b\u64cd\u4f5c\u6570\u4e2d\u5bf9\u5e94\u4f4d\u6267\u884c\u5e03\u5c14\u4ee3\u6570\uff0c<strong>\u4e24\u4e2a\u4f4d\u90fd\u4e3a1\u65f6\u8f93\u51fa1\uff0c\u5426\u52190<\/strong><\/td>\n<\/tr>\n<tr>\n<td>|<\/td>\n<td><strong>\u6216<\/strong>(<strong>OR<\/strong>)\u8fd0\u7b97\u7b26\uff0c\u5bf9\u4e24\u4e2a\u6574\u578b\u64cd\u4f5c\u6570\u4e2d\u5bf9\u5e94\u4f4d\u6267\u884c\u5e03\u5c14\u4ee3\u6570\uff0c<strong>\u4e24\u4e2a\u4f4d\u4e2d\u53ea\u8981\u6709\u4e00\u4e2a\u4e3a1\u5c31\u8f93\u51fa1\uff0c\u5426\u5219\u4e3a0<\/strong><\/td>\n<\/tr>\n<tr>\n<td>^<\/td>\n<td><strong>\u5f02\u6216<\/strong>(<strong>XOR<\/strong>)\u8fd0\u7b97\u7b26\uff0c\u5bf9\u4e24\u4e2a\u6574\u578b\u64cd\u4f5c\u6570\u4e2d\u5bf9\u5e94\u4f4d\u6267\u884c\u5e03\u5c14\u4ee3\u6570\uff0c<strong>\u4e24\u4e2a\u4f4d\u76f8\u7b49\u5219\u4e3a0\uff0c\u4e0d\u76f8\u7b49\u5219\u4e3a1<\/strong><\/td>\n<\/tr>\n<tr>\n<td>~<\/td>\n<td><strong>\u975e<\/strong>(<strong>NOT<\/strong>)\u8fd0\u7b97\u7b26\uff0c\u6309\u4f4d\u53d6\u53cd\u8fd0\u7b97\u7b26\u7ffb\u8f6c\u64cd\u4f5c\u6570\u7684\u6bcf\u4e00\u4f4d\uff0c\u5373<strong>0\u53d8\u62101\uff0c1\u53d8\u62100<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF%EF%BC%9A\"><\/span>\u5e94\u7528\u573a\u666f\uff1a<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"1%EF%BC%89%E5%88%A4%E6%96%AD%E5%A5%87%E5%81%B6%E6%80%A7\"><\/span>1\uff09\u5224\u65ad\u5947\u5076\u6027<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code>public void method1(int a){\n    if (a&amp;1 == 0) {\n        log.info(&quot;\u5076\u6570&quot;)\n    }else if ( a&amp;1 == 1) {\n        log.info(&quot;\u5947\u6570&quot;)\n    }\n}<\/code><\/pre>\n<p>\u5076\u6570\u7684\u6700\u4f4e\u4f4d\u80af\u5b9a\u662f0\uff0c\u5947\u6570\u7684\u6700\u4f4e\u4f4d\u80af\u5b9a\u662f1\uff0c\u800c1\u7684\u6700\u4f4e\u4f4d\u662f1\u5176\u4ed6\u4f4d\u90fd\u4e3a\u96f6\uff0c\u5f53\u8fdb\u884c\u4e0e\u8fd0\u7b97\u65f6\uff1a<\/p>\n<ul>\n<li>\u5076\u6570\u5fc5\u7136\uff1aa&amp;1 == 0<\/li>\n<li>\u5947\u6570\u5fc5\u7136\uff1aa&amp;1 == 1<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"2%EF%BC%89%E4%B8%8D%E4%BD%BF%E7%94%A8%E4%B8%AD%E9%97%B4%E5%8F%98%E9%87%8F%E4%BA%A4%E6%8D%A2%E4%B8%A4%E4%B8%AA%E6%95%B0\"><\/span>2\uff09\u4e0d\u4f7f\u7528\u4e2d\u95f4\u53d8\u91cf\u4ea4\u6362\u4e24\u4e2a\u6570<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code>public void swap(int a , int b) { \n    a = a ^ b;\n    b = b ^ a;\n    a = a ^ b;\n} <\/code><\/pre>\n<p>\u8fd9\u91cc\u9700\u8981\u77e5\u90533\u70b9\uff1a<\/p>\n<ol>\n<li>\u4efb\u4f55\u6570\u548c\u81ea\u5df1\u8fdb\u884c\u5f02\u6216\u64cd\u4f5c\u7ed3\u679c\u90fd\u4e3a0<\/li>\n<li>\u5f02\u6216\u7b26\u5408\u4ea4\u6362\u5f8b\uff0c\u5373a ^ b = b ^ a<\/li>\n<li>\u4efb\u4f55\u6570\u5f02\u62160\u7b49\u4e8e\u5b83\u672c\u8eab\uff08<br \/>\n\u5f02\u6216\u7684\u610f\u601d\u662f \u6309\u4f4d\u6bd4\u8f83,\u4f4d\u76f8\u540c\uff080,0\u62161,1\uff09\u65f6,\u7ed3\u679c\u4e3a0,\u4f4d\u4e0d\u540c\u65f6\uff080,1\u62161,0\uff09\u7ed3\u679c\u4e3a1<br \/>\n\u6240\u4ee5,0\u5f02\u6216\u4efb\u4f55\u6570A \u7ed3\u679c\u8fd8\u662fA \uff09<\/li>\n<\/ol>\n<p>\u597d\u7684\uff0c\u90a3\u4e48\u4e0a\u9762\u4ee3\u7801\u64cd\u4f5c\u5c31\u7b49\u4e8e\uff1a<\/p>\n<pre><code>a = a ^ b;\nb = b ^ a = b ^ (a ^ b) = a;\na = a ^ b = (a ^ b) ^ (b ^ (a ^ b)) = (a ^ b) ^ a = b;<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"3%EF%BC%89_%E5%88%A4%E6%96%AD%E4%B8%80%E4%B8%AA%E6%AD%A3%E6%95%B4%E6%95%B0%E6%98%AF%E4%B8%8D%E6%98%AF2%E7%9A%84%E6%95%B4%E6%95%B0%E6%AC%A1%E5%B9%82\"><\/span>3\uff09 \u5224\u65ad\u4e00\u4e2a\u6b63\u6574\u6570\u662f\u4e0d\u662f2\u7684\u6574\u6570\u6b21\u5e42<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code>public boolean power2(int a) {\n    if (a &lt;= 0){\n        System.out.println(&quot;\u8fd9\u91cc\u4e0d\u8ba1\u7b97\u8d1f\u6570\uff0c\u76f4\u63a5\u8fd4\u56defalse&quot;);\n        return false;\n    } else{\n        return (a&amp;(a-1))==0\n    }\n}<\/code><\/pre>\n<p>\u4efb\u4f55\u6b63\u6574\u6570\u5982\u679c\u662f2\u7684\u5e42\u6570\uff0c\u90fd\u5f62\u5982\u4e0b<\/p>\n<pre><code>10\n100\n1000\n10...0<\/code><\/pre>\n<p>\u5373\u9996\u4f4d\u90fd\u4e3a1,\u5f80\u540e\u4f4d\u6570\u90fd\u4e3a0,\u90a3\u4e48\u5728\u51cf\u53bb1\u540e\uff08\u4e8c\u8fdb\u5236\u8fdb\u4f4d\u3001\u9000\u4f4d\uff09\u53c8\u90fd\u5f62\u5982\u4e0b<\/p>\n<pre><code>01\n011\n0111\n01...1<\/code><\/pre>\n<p>\u6240\u4ee5<strong>\u5927\u4e8e\u96f6\u76842\u7684\u5e42\u6570\u548c\u81ea\u5df1\u51cf\u4e00\u540e\u7684\u6570\u8fdb\u884c\u4e0e\u8fd0\u7b97\u7ed3\u679c\u5fc5\u7136\u4e3a0<\/strong><\/p>\n<p>\u540e\u9762\u8fd8\u6709\uff0c\u5c31\u4e0d\u4e00\u4e00\u5217\u4e3e\u4e86\u3002\u53cd\u6b63\u5c31\u662f\u4f4d\u8fd0\u7b97\u53ef\u4ee5\u66ff\u4ee3\u5f88\u591a\u7684\u8fd0\u7b97\u7b26\u3002<\/p>\n<h4><span class=\"ez-toc-section\" id=\"4%EF%BC%89_%E6%8E%A9%E7%A0%81%E8%BF%90%E7%AE%97\"><\/span>4\uff09 \u63a9\u7801\u8fd0\u7b97<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u53d6\u4e00\u4e2abyte\u7684\u9ad84\u4f4d\u548c\u4f4e4\u4f4d<\/p>\n<pre><code>byte  num =   EncodingUtil.hex2byte(RecData.substring((9 + hLen) * 2, (10 + hLen) * 2))[0];\nint hNum = (num &amp; 0xF0) &gt;&gt; 4;\nint lNum = num &amp; 0x0F;<\/code><\/pre>\n<p>\u4f4d\u8fd0\u7b97\u5176\u5b9e\u5c31\u662f\u4e8c\u8fdb\u5236\u8fd0\u7b97\uff0c\u6bd4\u5982num = 33\uff0c\u8f6c\u6210\u4e8c\u8fdb\u5236\u662f100001\uff0c\u9ad8\u4f4d\u4e0d\u8db3\u88650\u53d8\u621000100001<\/p>\n<p>0xF0\u8f6c\u62102\u8fdb\u5236\u4e3a11110000<\/p>\n<p><strong>1)\u53d6\u9ad8\u56db\u4f4d\uff0c\u8ba1\u7b97 num &amp; 0xF0\uff1a<\/strong><\/p>\n<p><img src=\"http:\/\/122.152.205.50\/wordpress_it\/wp-content\/uploads\/2020\/09\/11.png\" alt=\"img\" \/><\/p>\n<p>&amp;0xF0:\u8fd9\u91ccF\u5176\u5b9e\u5c31\u662f\u4e3a\u4e86\u4fdd\u7559\u9ad8\u4f4d\uff0c0\u5c31\u662f\u4f4e\u4f4d\u5168\u90e8\u7f6e0.<br \/>\n\u8fd9\u6837\u518d&gt;&gt;4\uff1a\uff08\u6ce8\u610f\uff1a<strong>\u53d6\u9ad8\u4f4d\u9700\u8981\u53f3\u79fb<\/strong>\uff09<\/p>\n<p><img src=\"http:\/\/122.152.205.50\/wordpress_it\/wp-content\/uploads\/2020\/09\/22.png\" alt=\"img\" \/><\/p>\n<p>\u8fd9\u6837\u5c060010\u79fb\u5230\u4f4e4\u4f4d\uff0c\u8fd9\u5f97\u5230num\u7684\u9ad84\u4f4d\u7684\u503c\u4e86\u3002<br \/>\n<strong>2\uff09\u53d6\u4f4e\u56db\u4f4d\uff0cnum &amp; 0x0F<\/strong><\/p>\n<p>\u8fd9\u4e2a\u4e0e1\uff09\u4e2d\u7684\u539f\u7406\u4e00\u6837\uff1a0\u662f\u6d88\u9664\u4f4d\uff0cF\u662f\u4fdd\u7559\u4f4d\u3002<br \/>\n\u53d6\u7684\u4f4e4\u4f4d\u5c31\u662fnum\u7684\u4f4e\u56db\u4f4d\uff0c\u4e0d\u9700\u8981\u79fb\u52a8\u3002<\/p>\n<button class=\"simplefavorite-button\" data-postid=\"1702\" data-siteid=\"1\" data-groupid=\"1\" data-favoritecount=\"0\" style=\"\">\u6536\u85cf <i class=\"sf-icon-star-empty\"><\/i><\/button>","protected":false},"excerpt":{"rendered":"<p>\u76ee\u5f55 1.\u903b\u8f91\u53f3\u79fb\u4e0e\u7b97\u672f\u53f3\u79fb\u7684\u533a\u522b2.\u4f4d\u5411\u91cf\u4f4d\u5411\u91cf\u5e94\u75281\uff1a\u8868\u793a\u6709\u9650\u96c6\u54083.Java\u4f4d\u8fd0\u7b97\u5e94\u7528\u573a\u666f\uff1a1 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[37],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/1702"}],"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=1702"}],"version-history":[{"count":35,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/1702\/revisions"}],"predecessor-version":[{"id":11032,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/1702\/revisions\/11032"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1702"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1702"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1702"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}