{"id":56219,"date":"2025-08-14T14:44:30","date_gmt":"2025-08-14T06:44:30","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/56219.html"},"modified":"2025-08-14T14:44:30","modified_gmt":"2025-08-14T06:44:30","slug":"java-%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b%e5%8a%a0%e8%bf%90%e7%ae%97%e7%ac%a6","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/56219.html","title":{"rendered":"Java--\u6570\u636e\u7c7b\u578b\u52a0\u8fd0\u7b97\u7b26"},"content":{"rendered":"<\/p>\n<h4>Java&#8211;\u6570\u636e\u7c7b\u578b\u52a0\u8fd0\u7b97\u7b26<\/h4>\n<ul>\n<li>\n<ul>\n<li>\u6570\u636e\u7c7b\u578b<\/li>\n<li>\u7c7b\u578b\u8f6c\u6362\u7684\u8981\u70b9<\/li>\n<li>\n<ul>\n<li>\u9690\u5f0f\u7c7b\u578b\u63d0\u5347&#xff08;Type Promotion&#xff09;<\/li>\n<li>\u663e\u5f0f\u7c7b\u578b\u8f6c\u6362&#xff08;Type Casting&#xff09;<\/li>\n<li>\u6570\u636e\u4e22\u5931\u548c\u7c7b\u578b\u5b89\u5168&#xff08;Data Loss and Type Safety&#xff09;<\/li>\n<li>\u7f16\u8bd1\u5668\u9519\u8bef&#xff08;Compiler 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:root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;}<\/p>\n<p>         <span id=\"L-L-A-B\" class=\"edgeLabel L-LS-A&#039; L-LE-B\">\u7f16\u8bd1 javac<\/span><\/p>\n<p>         <span id=\"L-L-B-C\" class=\"edgeLabel L-LS-B&#039; L-LE-C\">\u8fd0\u884cjava<\/span><\/p>\n<p>          .java<\/p>\n<p>          .class \u5b57\u8282\u7801\u6587\u4ef6<\/p>\n<p>          JVM<\/p>\n<h3>\u6570\u636e\u7c7b\u578b<\/h3>\n<p>  #mermaid-svg-rAseG3yL6sxJXjJ3 {font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;fill:#333;}#mermaid-svg-rAseG3yL6sxJXjJ3 .error-icon{fill:#552222;}#mermaid-svg-rAseG3yL6sxJXjJ3 .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-rAseG3yL6sxJXjJ3 .edge-thickness-normal{stroke-width:2px;}#mermaid-svg-rAseG3yL6sxJXjJ3 .edge-thickness-thick{stroke-width:3.5px;}#mermaid-svg-rAseG3yL6sxJXjJ3 .edge-pattern-solid{stroke-dasharray:0;}#mermaid-svg-rAseG3yL6sxJXjJ3 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#aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-rAseG3yL6sxJXjJ3 :root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;}<\/p>\n<p>         <span id=\"L-L-A-B\" class=\"edgeLabel L-LS-A&#039; L-LE-B\"><\/span><\/p>\n<p>         <span id=\"L-L-A-C\" class=\"edgeLabel L-LS-A&#039; L-LE-C\"><\/span><\/p>\n<p>         <span id=\"L-L-B-D\" class=\"edgeLabel L-LS-B&#039; L-LE-D\"><\/span><\/p>\n<p>         <span id=\"L-L-B-E\" class=\"edgeLabel L-LS-B&#039; L-LE-E\"><\/span><\/p>\n<p>         <span id=\"L-L-B-F\" class=\"edgeLabel L-LS-B&#039; L-LE-F\"><\/span><\/p>\n<p>         <span id=\"L-L-B-G\" class=\"edgeLabel L-LS-B&#039; L-LE-G\"><\/span><\/p>\n<p>         <span id=\"L-L-C-H\" class=\"edgeLabel L-LS-C&#039; L-LE-H\"><\/span><\/p>\n<p>          \u6570\u636e\u7c7b\u578b<\/p>\n<p>          \u57fa\u672c\u6570\u636e\u7c7b\u578b<\/p>\n<p>          \u5f15\u7528\u6570\u636e\u7c7b\u578b<\/p>\n<p>          \u6574\u6570<\/p>\n<p>          \u6d6e\u70b9\u7c7b\u578b<\/p>\n<p>          \u5b57\u7b26\u7c7b\u578b<\/p>\n<p>          \u5e03\u5c14\u7c7b\u578b<\/p>\n<p>          \u6570\u7ec4 \u7c7b \u63a5\u53e3 \u5b57\u7b26\u4e32&#8230;&#8230;<\/p>\n<table>\n<tr>\u6570\u636e\u7c7b\u578b\u5173\u952e\u5b57\u5185\u5b58\u5360\u7528 (\u5b57\u8282)\u8303\u56f4<\/tr>\n<tbody>\n<tr>\n<td align=\"center\">byte<\/td>\n<td align=\"center\">1<\/td>\n<td align=\"center\">-128 \u5230 127<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">short<\/td>\n<td align=\"center\">2<\/td>\n<td align=\"center\">-32,768 \u5230 32,767<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">int<\/td>\n<td align=\"center\">4<\/td>\n<td align=\"center\">-2,147,483,648 \u5230 2,147,483,647<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">long<\/td>\n<td align=\"center\">8<\/td>\n<td align=\"center\">-9,223,372,036,854,775,808 \u5230 9,223,372,036,854,775,807<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">float<\/td>\n<td align=\"center\">4<\/td>\n<td align=\"center\">\u5355\u7cbe\u5ea6 32 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Casting&#xff09;<\/h4>\n<p>\u5728\u5c06\u8fd0\u7b97\u7ed3\u679c\u8d4b\u503c\u56de\u8f83\u5c0f\u7684\u6570\u636e\u7c7b\u578b\u53d8\u91cf\u65f6&#xff0c;\u5fc5\u987b\u8fdb\u884c\u663e\u5f0f\u7c7b\u578b\u8f6c\u6362\u3002\u8fd9\u662f\u56e0\u4e3a&#xff0c;\u5982\u679c\u6ca1\u6709\u663e\u5f0f\u8f6c\u6362&#xff0c;\u8f83\u5927\u7684\u6570\u636e\u7c7b\u578b&#xff08;\u5982int&#xff09;\u53ef\u80fd\u5305\u542b\u8f83\u5c0f\u7684\u6570\u636e\u7c7b\u578b&#xff08;\u5982byte\u6216short&#xff09;\u65e0\u6cd5\u8868\u793a\u7684\u503c\u3002\u76f4\u63a5\u8d4b\u503c\u4f1a\u5bfc\u81f4\u7f16\u8bd1\u5668\u62a5\u9519&#xff0c;\u56e0\u4e3a\u8fd9\u79cd\u64cd\u4f5c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6570\u636e\u4e22\u5931\u3002<\/p>\n<p>\u4f8b\u5982&#xff0c;\u5982\u679c\u4e00\u4e2aint\u7c7b\u578b\u7684\u53d8\u91cf\u5b58\u50a8\u7684\u503c\u8d85\u51fa\u4e86byte\u7c7b\u578b\u53d8\u91cf\u7684\u8868\u793a\u8303\u56f4&#xff0c;\u76f4\u63a5\u8d4b\u503c\u5c06\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898&#xff0c;\u53ef\u4ee5\u4f7f\u7528\u663e\u5f0f\u7c7b\u578b\u8f6c\u6362&#xff0c;\u5982\u4e0b\u6240\u793a&#xff1a;<\/p>\n<p><span class=\"token keyword\">byte<\/span> b <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">200<\/span><span class=\"token punctuation\">;<\/span><br \/>\ni <span class=\"token operator\">&#061;<\/span> i <span class=\"token operator\">&#043;<\/span> b<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u81ea\u52a8\u7c7b\u578b\u63d0\u5347&#xff1a;b \u88ab\u63d0\u5347\u4e3a int \u7c7b\u578b<\/span><br \/>\nb <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">)<\/span> i<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u663e\u5f0f\u7c7b\u578b\u8f6c\u6362&#xff1a;\u5c06 i \u8f6c\u6362\u4e3a byte \u7c7b\u578b<\/span><\/p>\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d&#xff0c;b\u548ci\u76f8\u52a0\u65f6&#xff0c;b\u88ab\u9690\u5f0f\u63d0\u5347\u4e3aint\u7c7b\u578b\u3002\u4f46\u662f&#xff0c;\u5f53\u5c1d\u8bd5\u5c06\u7ed3\u679c\u8d4b\u503c\u56deb\u65f6&#xff0c;\u5fc5\u987b\u663e\u5f0f\u5730\u5c06i\u8f6c\u6362\u4e3abyte\u7c7b\u578b&#xff0c;\u4ee5\u786e\u4fdd\u7ed3\u679c\u5728byte\u7c7b\u578b\u7684\u8303\u56f4\u5185\u3002<\/p>\n<h4>\u6570\u636e\u4e22\u5931\u548c\u7c7b\u578b\u5b89\u5168&#xff08;Data Loss and Type Safety&#xff09;<\/h4>\n<p>\u5728\u8fdb\u884c\u663e\u5f0f\u7c7b\u578b\u8f6c\u6362\u65f6&#xff0c;\u5fc5\u987b\u5c0f\u5fc3\u5904\u7406\u53ef\u80fd\u7684\u6570\u636e\u4e22\u5931\u3002\u5982\u679c\u8f6c\u6362\u540e\u7684\u503c\u8d85\u51fa\u4e86\u76ee\u6807\u7c7b\u578b\u7684\u8868\u793a\u8303\u56f4&#xff0c;\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6570\u636e\u4e22\u5931\u6216\u4e0d\u53ef\u9884\u6d4b\u7684\u884c\u4e3a\u3002\u56e0\u6b64&#xff0c;\u7a0b\u5e8f\u5458\u6709\u8d23\u4efb\u786e\u4fdd\u7c7b\u578b\u8f6c\u6362\u662f\u5b89\u5168\u7684&#xff0c;\u5e76\u4e14\u4e0d\u4f1a\u5bfc\u81f4\u6570\u636e\u4e22\u5931\u3002<\/p>\n<h4>\u7f16\u8bd1\u5668\u9519\u8bef&#xff08;Compiler Errors&#xff09;<\/h4>\n<p>\u5982\u679c\u4e0d\u8fdb\u884c\u9002\u5f53\u7684\u7c7b\u578b\u8f6c\u6362&#xff0c;\u7f16\u8bd1\u5668\u4f1a\u62a5\u9519&#xff0c;\u56e0\u4e3a Java \u662f\u4e00\u79cd\u9759\u6001\u7c7b\u578b\u8bed\u8a00&#xff08;statically-typed language&#xff09;&#xff0c;\u5b83\u8981\u6c42\u5728\u7f16\u8bd1\u65f6\u5c31\u786e\u5b9a\u6240\u6709\u53d8\u91cf\u548c\u8868\u8fbe\u5f0f\u7684\u7c7b\u578b\u3002\u8fd9\u79cd\u7c7b\u578b\u68c0\u67e5\u673a\u5236\u6709\u52a9\u4e8e\u5728\u7f16\u8bd1\u65f6\u6355\u83b7\u6f5c\u5728\u7684\u9519\u8bef&#xff0c;\u4ece\u800c\u63d0\u9ad8\u7a0b\u5e8f\u7684\u53ef\u9760\u6027\u548c\u7a33\u5b9a\u6027\u3002<\/p>\n<h3>\u4f4d\u8fd0\u7b97\u548c\u903b\u8f91\u8fd0\u7b97<\/h3>\n<p>\u5728Java\u4e2d&#xff0c;\u4f4d\u8fd0\u7b97\u548c\u903b\u8f91\u8fd0\u7b97\u662f\u4e24\u79cd\u4e0d\u540c\u7684\u8fd0\u7b97\u7c7b\u578b&#xff0c;\u5b83\u4eec\u5728\u5e95\u5c42\u5bf9\u6570\u636e\u8fdb\u884c\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662fJava\u4e2d\u652f\u6301\u7684\u4f4d\u8fd0\u7b97\u7b26\u548c\u903b\u8f91\u8fd0\u7b97\u7b26&#xff0c;\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u5b83\u4eec\u7684\u65b9\u6cd5&#xff1a;<\/p>\n<h4>\u903b\u8f91\u8fd0\u7b97\u7b26<\/h4>\n<p>\u903b\u8f91\u8fd0\u7b97\u7b26\u7528\u4e8e\u6267\u884c\u903b\u8f91\u6bd4\u8f83&#xff0c;\u5e76\u8fd4\u56de\u5e03\u5c14\u503c&#xff08;true\u6216false&#xff09;\u3002<\/p>\n<p>\u2022 &amp;&amp;&#xff08;\u903b\u8f91\u4e0e&#xff09;&#xff1a;\u5f53\u4e14\u4ec5\u5f53\u4e24\u4e2a\u64cd\u4f5c\u6570\u90fd\u4e3atrue\u65f6&#xff0c;\u7ed3\u679c\u624d\u4e3atrue\u3002<\/p>\n<p>\u2022 ||&#xff08;\u903b\u8f91\u6216&#xff09;&#xff1a;\u5982\u679c\u4e24\u4e2a\u64cd\u4f5c\u6570\u4e2d\u81f3\u5c11\u6709\u4e00\u4e2a\u4e3atrue&#xff0c;\u5219\u7ed3\u679c\u4e3atrue\u3002<\/p>\n<p>\u2022 !&#xff08;\u903b\u8f91\u975e&#xff09;&#xff1a;\u53cd\u8f6c\u64cd\u4f5c\u6570\u7684\u5e03\u5c14\u503c\u3002<\/p>\n<p>\u793a\u4f8b\u65b9\u6cd5&#xff1a;<\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">LogicalOperations<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">boolean<\/span> <span class=\"token function\">andOperation<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">boolean<\/span> a<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">boolean<\/span> b<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&amp;&amp;<\/span> b<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">boolean<\/span> <span class=\"token function\">orOperation<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">boolean<\/span> a<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">boolean<\/span> b<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">||<\/span> b<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">boolean<\/span> <span class=\"token function\">notOperation<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">boolean<\/span> a<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">!<\/span>a<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">andOperation<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8f93\u51fa false<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">orOperation<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u8f93\u51fa true<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">notOperation<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/\/ \u8f93\u51fa false<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>\u4f4d\u8fd0\u7b97\u7b26<\/h4>\n<p>\u4f4d\u8fd0\u7b97\u7b26\u5bf9\u6574\u6570\u7684\u4e8c\u8fdb\u5236\u4f4d\u8fdb\u884c\u64cd\u4f5c\u3002 &#xff08;\u9ec4\u8272\u4e3a\u7b80\u6613\u53e3\u8bc0&#xff09;<\/p>\n<p>\u2022 &amp;&#xff08;\u4f4d\u4e0e&#xff09;&#xff1a;\u5bf9\u4e24\u4e2a\u64cd\u4f5c\u6570\u7684\u6bcf\u4e00\u4f4d\u6267\u884c\u903b\u8f91\u4e0e\u64cd\u4f5c\u3002 \u67090\u52190&#xff0c;\u540c1\u4e3a1<\/p>\n<p>\u2022 |&#xff08;\u4f4d\u6216&#xff09;&#xff1a;\u5bf9\u4e24\u4e2a\u64cd\u4f5c\u6570\u7684\u6bcf\u4e00\u4f4d\u6267\u884c\u903b\u8f91\u6216\u64cd\u4f5c\u3002 \u67091\u52191&#xff0c;\u540c0\u4e3a0<\/p>\n<p>\u2022 ^&#xff08;\u4f4d\u5f02\u6216&#xff09;&#xff1a;\u5bf9\u4e24\u4e2a\u64cd\u4f5c\u6570\u7684\u6bcf\u4e00\u4f4d\u6267\u884c\u903b\u8f91\u5f02\u6216\u64cd\u4f5c\u3002 \u76f8\u540c\u4e3a0&#xff0c;\u4e0d\u540c\u4e3a1<\/p>\n<p>\u2022 ~&#xff08;\u4f4d\u975e&#xff09;&#xff1a;\u53cd\u8f6c\u64cd\u4f5c\u6570\u7684\u6240\u6709\u4f4d\u3002<\/p>\n<p>\u2022 &lt;&lt;&#xff08;\u5de6\u79fb&#xff09;&#xff1a;\u5c06\u64cd\u4f5c\u6570\u7684\u4f4d\u5411\u5de6\u79fb\u52a8\u6307\u5b9a\u7684\u4f4d\u6570\u3002<\/p>\n<p>\u2022 &gt;&gt;&#xff08;\u53f3\u79fb&#xff09;&#xff1a;\u5c06\u64cd\u4f5c\u6570\u7684\u4f4d\u5411\u53f3\u79fb\u52a8\u6307\u5b9a\u7684\u4f4d\u6570\u3002<\/p>\n<p>\u2022 &gt;&gt;&gt;&#xff08;\u65e0\u7b26\u53f7\u53f3\u79fb&#xff09;&#xff1a;\u5c06\u64cd\u4f5c\u6570\u7684\u4f4d\u5411\u53f3\u79fb\u52a8\u6307\u5b9a\u7684\u4f4d\u6570&#xff0c;\u5de6\u8fb9\u75280\u586b\u5145\u3002<\/p>\n<p>\u793a\u4f8b\u65b9\u6cd5&#xff1a;<\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">BitwiseOperations<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">bitwiseAnd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> b<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&amp;<\/span> b<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">bitwiseOr<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> b<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">|<\/span> b<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">bitwiseXor<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> b<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">^<\/span> b<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">bitwiseNot<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">~<\/span>a<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">leftShift<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> shift<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&lt;&lt;<\/span> shift<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">rightShift<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> shift<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&gt;&gt;<\/span> shift<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">unsignedRightShift<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> shift<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&gt;&gt;&gt;<\/span> shift<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">bitwiseAnd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">7<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u8f93\u51fa 2<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">bitwiseOr<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">7<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u8f93\u51fa 15<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">bitwiseXor<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">7<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u8f93\u51fa 13<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">bitwiseNot<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/ \u8f93\u51fa -11<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">leftShift<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u8f93\u51fa 40<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">rightShift<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u8f93\u51fa 2<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">unsignedRightShift<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8f93\u51fa 1073741822<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5728\u8fd9\u4e9b\u793a\u4f8b\u65b9\u6cd5\u4e2d&#xff0c;\u6211\u4eec\u5b9a\u4e49\u4e86\u5404\u79cd\u4f4d\u8fd0\u7b97\u548c\u903b\u8f91\u8fd0\u7b97&#xff0c;\u5e76\u5728main\u65b9\u6cd5\u4e2d\u63d0\u4f9b\u4e86\u6d4b\u8bd5\u7528\u4f8b\u3002\u60a8\u53ef\u4ee5\u6839\u636e\u9700\u8981\u8c03\u7528\u8fd9\u4e9b\u65b9\u6cd5\u6765\u6267\u884c\u76f8\u5e94\u7684\u8fd0\u7b97\u3002\u8bf7\u6ce8\u610f&#xff0c;\u4f4d\u8fd0\u7b97\u7b26\u53ea\u80fd\u7528\u4e8e\u6574\u6570\u7c7b\u578b&#xff08;byte\u3001short\u3001int\u3001long&#xff09;&#xff0c;\u800c\u903b\u8f91\u8fd0\u7b97\u7b26\u53ea\u80fd\u7528\u4e8e\u5e03\u5c14\u7c7b\u578b&#xff08;boolean&#xff09;\u3002<\/p>\n<p>\u6ca1\u6709 &lt;&lt;&lt; (\u65e0\u7b26\u53f7\u7b26\u53f7\u5de6\u79fb[\u4e0d\u5b58\u5728]) 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\/\/\u7ed3\u679c\u662f&#034;HelloWorld44&#034;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb88\u6b21\u3002\u672c\u6587\u4ecb\u7ecd\u4e86Java\u7f16\u7a0b\u4e2d\u7684\u6570\u636e\u7c7b\u578b\u4e0e\u8fd0\u7b97\u7b26\u76f8\u5173\u5185\u5bb9\u3002\u9996\u5148\u8bf4\u660eJava\u6e90\u4ee3\u7801\u7f16\u8bd1\u8fc7\u7a0b\uff08.java\u2192.class\u2192JVM\u6267\u884c\uff09\uff0c\u4f53\u73b0&quot;\u4e00\u6b21\u7f16\u5199\uff0c\u5230\u5904\u8fd0\u884c&quot;\u7279\u6027\u3002\u5176\u6b21\u8be6\u7ec6\u5206\u7c7b\u4e86\u6570\u636e\u7c7b\u578b\uff0c\u5305\u62ec8\u79cd\u57fa\u672c\u6570\u636e\u7c7b\u578b\uff08byte\u3001short\u3001int\u3001long\u3001float\u3001double\u3001char\u3001boolean\uff09\u53ca\u5176\u5185\u5b58\u5360\u7528\u548c\u8303\u56f4\uff0c\u4ee5\u53ca\u5f15\u7528\u6570\u636e\u7c7b\u578b\u3002\u91cd\u70b9\u8bb2\u89e3\u4e86\u7c7b\u578b\u8f6c\u6362\u673a\u5236\uff0c\u5305\u62ec\u9690\u5f0f\u7c7b\u578b\u63d0\u5347\u548c\u5fc5\u987b\u7684\u663e\u5f0f\u7c7b\u578b\u8f6c\u6362\uff0c\u5f3a\u8c03\u6570\u636e\u4e22\u5931\u98ce\u9669\u3002\u6700\u540e\u5bf9\u6bd4\u4e86\u4f4d\u8fd0\u7b97\uff08&amp;|^~&lt;&lt;&gt;&gt;\uff09\u548c\u903b\u8f91\u8fd0\u7b97\uff08<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[99,190],"topic":[],"class_list":["post-56219","post","type-post","status-publish","format-standard","hentry","category-server","tag-java","tag-190"],"yoast_head":"<!-- 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