{"id":208398,"date":"2025-09-09T12:20:04","date_gmt":"2025-09-09T04:20:04","guid":{"rendered":"https:\/\/www.server.hk\/blog\/?p=208398"},"modified":"2025-09-09T12:20:04","modified_gmt":"2025-09-09T04:20:04","slug":"%e7%b2%be%e9%80%9ajava%e6%8e%a7%e5%88%b6%e8%af%ad%e5%8f%a5%ef%bc%9a%e5%bc%80%e5%8f%91%e8%80%85%e7%bb%bc%e5%90%88%e6%8c%87%e5%8d%97","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/208398\/","title":{"rendered":"\u7cbe\u901aJava\u63a7\u5236\u8bed\u53e5\uff1a\u5f00\u53d1\u8005\u7efc\u5408\u6307\u5357"},"content":{"rendered":"<p dir=\"auto\">Java\u63a7\u5236\u8bed\u53e5\u662f\u63a7\u5236\u7a0b\u5e8f\u6267\u884c\u6d41\u7a0b\u7684\u57fa\u7840\u7ed3\u6784\uff0c\u5141\u8bb8\u5f00\u53d1\u8005\u5b9e\u73b0\u51b3\u7b56\u3001\u5faa\u73af\u548c\u6d41\u7a0b\u63a7\u5236\uff0c\u662f\u6784\u5efa\u5065\u58eeJava\u5e94\u7528\u7684\u6838\u5fc3\u3002\u672c\u6307\u5357\u6df1\u5165\u63a2\u8ba8Java\u7684\u63a7\u5236\u8bed\u53e5\u2014\u2014\u9009\u62e9\u8bed\u53e5\u3001\u5faa\u73af\u8bed\u53e5\u548c\u8df3\u8f6c\u8bed\u53e5\uff0c\u63d0\u4f9b\u8be6\u7ec6\u7684\u89e3\u91ca\u3001\u6700\u4f73\u5b9e\u8df5\u548c\u5b9e\u7528\u793a\u4f8b\uff0c\u4ee5\u63d0\u5347\u60a8\u7684\u7f16\u7801\u80fd\u529b\u3002<\/p>\n<h2 dir=\"auto\">Java\u63a7\u5236\u8bed\u53e5\u6982\u8ff0<\/h2>\n<p dir=\"auto\">Java\u63a7\u5236\u8bed\u53e5\u53ef\u5206\u4e3a\u4e09\u5927\u7c7b\uff1a<\/p>\n<ul dir=\"auto\">\n<li><strong>\u9009\u62e9\u8bed\u53e5<\/strong>\uff1a\u6839\u636e\u7279\u5b9a\u6761\u4ef6\u6267\u884c\u4ee3\u7801\uff08if\u3001switch\uff09\u3002<\/li>\n<li><strong>\u5faa\u73af\u8bed\u53e5<\/strong>\uff1a\u5b9e\u73b0\u4ee3\u7801\u5757\u7684\u91cd\u590d\u6267\u884c\uff08while\u3001do-while\u3001for\u3001\u589e\u5f3a\u578bfor\uff09\u3002<\/li>\n<li><strong>\u8df3\u8f6c\u8bed\u53e5<\/strong>\uff1a\u6539\u53d8\u6267\u884c\u6d41\u7a0b\uff0c\u9000\u51fa\u5faa\u73af\u6216\u65b9\u6cd5\uff08break\u3001continue\u3001return\uff09\u3002<\/li>\n<\/ul>\n<p dir=\"auto\">\u672c\u6587\u5c06\u9010\u4e00\u8bb2\u89e3\u6bcf\u4e2a\u7c7b\u522b\uff0c\u63d0\u4f9b\u6e05\u6670\u7684\u8bed\u6cd5\u3001\u4fee\u6b63\u540e\u7684\u793a\u4f8b\u548c\u9762\u5411\u6280\u672f\u53d7\u4f17\u7684\u5b9e\u7528\u5efa\u8bae\u3002<\/p>\n<h2 dir=\"auto\">\u9009\u62e9\u8bed\u53e5<\/h2>\n<p dir=\"auto\">\u9009\u62e9\u8bed\u53e5\u5141\u8bb8\u7a0b\u5e8f\u6839\u636e\u6761\u4ef6\u6267\u884c\u7279\u5b9a\u7684\u4ee3\u7801\u5757\u3002<\/p>\n<h3 dir=\"auto\">1. if\u8bed\u53e5<\/h3>\n<p dir=\"auto\">if\u8bed\u53e5\u8bc4\u4f30\u4e00\u4e2a\u5e03\u5c14\u6761\u4ef6\u3002\u5982\u679c\u6761\u4ef6\u4e3atrue\uff0c\u5219\u6267\u884c\u76f8\u5173\u4ee3\u7801\u5757\uff1b\u5426\u5219\uff0c\u8df3\u5230\u4e0b\u4e00\u6761\u8bed\u53e5\u3002<\/p>\n<p dir=\"auto\"><strong>\u8bed\u6cd5<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>java<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>if (\u6761\u4ef6) {\r\n    \/\/ \u6761\u4ef6\u4e3atrue\u65f6\u6267\u884c\u7684\u4ee3\u7801\r\n}<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u793a\u4f8b<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>java<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>public class IfExample {\r\n    public static void main(String[] args) {\r\n        int value = 15;\r\n        if (value &lt; 20) {\r\n            System.out.println(\"\u503c\u5c0f\u4e8e20\");\r\n        }\r\n    }\r\n}<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u8f93\u51fa<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>text<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>\u503c\u5c0f\u4e8e20<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<h3 dir=\"auto\">2. if-else\u8bed\u53e5<\/h3>\n<p dir=\"auto\">if-else\u8bed\u53e5\u4e3aif\u6761\u4ef6\u4e3afalse\u65f6\u63d0\u4f9b\u4e00\u4e2a\u66ff\u4ee3\u6267\u884c\u7684\u4ee3\u7801\u5757\u3002<\/p>\n<p dir=\"auto\"><strong>\u8bed\u6cd5<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>java<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>if (\u6761\u4ef6) {\r\n    \/\/ \u6761\u4ef6\u4e3atrue\u65f6\u6267\u884c\u7684\u4ee3\u7801\r\n} else {\r\n    \/\/ \u6761\u4ef6\u4e3afalse\u65f6\u6267\u884c\u7684\u4ee3\u7801\r\n}<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u793a\u4f8b<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>java<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>public class IfElseExample {\r\n    public static void main(String[] args) {\r\n        int value = 25;\r\n        if (value &lt; 20) {\r\n            System.out.println(\"\u503c\u5c0f\u4e8e20\");\r\n        } else {\r\n            System.out.println(\"\u503c\u5927\u4e8e\u6216\u7b49\u4e8e20\");\r\n        }\r\n    }\r\n}<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u8f93\u51fa<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>text<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>\u503c\u5927\u4e8e\u6216\u7b49\u4e8e20<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<h3 dir=\"auto\">3. if-else-if-else\u8bed\u53e5<\/h3>\n<p dir=\"auto\">if-else-if-else\u7ed3\u6784\u9002\u7528\u4e8e\u591a\u4e2a\u6761\u4ef6\u7684\u5206\u6b65\u8bc4\u4f30\u3002\u53ea\u6709\u7b2c\u4e00\u4e2a\u4e3atrue\u7684\u6761\u4ef6\u7684\u4ee3\u7801\u5757\u4f1a\u88ab\u6267\u884c\uff0c\u540e\u7eed\u6761\u4ef6\u5c06\u88ab\u8df3\u8fc7\u3002<\/p>\n<p dir=\"auto\"><strong>\u8bed\u6cd5<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>java<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>if (\u6761\u4ef61) {\r\n    \/\/ \u6761\u4ef61\u4e3atrue\u65f6\u6267\u884c\u7684\u4ee3\u7801\r\n} else if (\u6761\u4ef62) {\r\n    \/\/ \u6761\u4ef62\u4e3atrue\u65f6\u6267\u884c\u7684\u4ee3\u7801\r\n} else {\r\n    \/\/ \u6240\u6709\u6761\u4ef6\u90fd\u4e0d\u4e3atrue\u65f6\u6267\u884c\u7684\u4ee3\u7801\r\n}<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u793a\u4f8b<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>java<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>public class IfElseIfExample {\r\n    public static void main(String[] args) {\r\n        int score = 85;\r\n        if (score &gt;= 90) {\r\n            System.out.println(\"\u7b49\u7ea7\uff1aA\");\r\n        } else if (score &gt;= 80) {\r\n            System.out.println(\"\u7b49\u7ea7\uff1aB\");\r\n        } else {\r\n            System.out.println(\"\u7b49\u7ea7\uff1aC\u6216\u4ee5\u4e0b\");\r\n        }\r\n    }\r\n}<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u8f93\u51fa<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>text<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>\u7b49\u7ea7\uff1aB<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<h3 dir=\"auto\">4. \u5d4c\u5957if\u8bed\u53e5<\/h3>\n<p dir=\"auto\">\u5d4c\u5957if\u8bed\u53e5\u5141\u8bb8\u5728\u4e00\u4e2aif\u5757\u4e2d\u68c0\u67e5\u53e6\u4e00\u4e2a\u6761\u4ef6\uff0c\u4ece\u800c\u5b9e\u73b0\u590d\u6742\u7684\u51b3\u7b56\u903b\u8f91\u3002<\/p>\n<p dir=\"auto\"><strong>\u8bed\u6cd5<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>java<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>if (\u6761\u4ef61) {\r\n    if (\u6761\u4ef62) {\r\n        \/\/ \u4e24\u4e2a\u6761\u4ef6\u90fd\u4e3atrue\u65f6\u6267\u884c\u7684\u4ee3\u7801\r\n    }\r\n}<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u793a\u4f8b<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>java<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>public class NestedIfExample {\r\n    public static void main(String[] args) {\r\n        int x = 50;\r\n        int y = 25;\r\n        if (x &gt; 30) {\r\n            if (y &gt; 20) {\r\n                System.out.println(\"\u6ee1\u8db3\u6761\u4ef6\uff1ax &gt; 30 \u4e14 y &gt; 20\");\r\n            }\r\n        }\r\n    }\r\n}<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u8f93\u51fa<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>text<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>\u6ee1\u8db3\u6761\u4ef6\uff1ax &gt; 30 \u4e14 y &gt; 20<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<h3 dir=\"auto\">5. switch\u8bed\u53e5<\/h3>\n<p dir=\"auto\">switch\u8bed\u53e5\u5c06\u4e00\u4e2a\u8868\u8fbe\u5f0f\u7684\u503c\u4e0e\u591a\u4e2a\u5e38\u91cf\u503c\uff08case\u6807\u7b7e\uff09\u8fdb\u884c\u6bd4\u8f83\uff0c\u9002\u5408\u5904\u7406\u591a\u4e2a\u79bb\u6563\u7ed3\u679c\u7684\u573a\u666f\u3002<\/p>\n<p dir=\"auto\"><strong>\u5173\u952e\u89c4\u5219<\/strong>\uff1a<\/p>\n<ul dir=\"auto\">\n<li>\u652f\u6301\u7684\u7c7b\u578b\uff1abyte\u3001short\u3001int\u3001char\u3001String\u548cenum\uff08\u81eaJava 7\u8d77\u652f\u6301String\uff09\u3002<\/li>\n<li>\u6bcf\u4e2acase\u5fc5\u987b\u662f\u5e38\u91cf\u6216\u5b57\u9762\u503c\u3002<\/li>\n<li>\u6267\u884c\u6301\u7eed\u5230\u9047\u5230break\u8bed\u53e5\u6216switch\u5757\u7ed3\u675f\u3002<\/li>\n<li>\u5efa\u8bae\u4f7f\u7528default\u5206\u652f\u5904\u7406\u672a\u5339\u914d\u7684\u503c\u3002<\/li>\n<\/ul>\n<p dir=\"auto\"><strong>\u8bed\u6cd5<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>java<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>switch (\u8868\u8fbe\u5f0f) {\r\n    case \u503c1:\r\n        \/\/ \u4ee3\u7801\r\n        break;\r\n    case \u503c2:\r\n        \/\/ \u4ee3\u7801\r\n        break;\r\n    default:\r\n        \/\/ \u672a\u5339\u914d\u60c5\u51b5\u7684\u4ee3\u7801\r\n        break;\r\n}<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u793a\u4f8b<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>java<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>public class SwitchExample {\r\n    public static void main(String[] args) {\r\n        char grade = 'B';\r\n        switch (grade) {\r\n            case 'A':\r\n                System.out.println(\"\u8868\u73b0\u4f18\u5f02\");\r\n                break;\r\n            case 'B':\r\n            case 'C':\r\n                System.out.println(\"\u8868\u73b0\u826f\u597d\");\r\n                break;\r\n            case 'D':\r\n                System.out.println(\"\u53ca\u683c\");\r\n                break;\r\n            default:\r\n                System.out.println(\"\u65e0\u6548\u7b49\u7ea7\");\r\n                break;\r\n        }\r\n    }\r\n}<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u8f93\u51fa<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>text<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>\u8868\u73b0\u826f\u597d<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u6700\u4f73\u5b9e\u8df5<\/strong>\uff1a<\/p>\n<ul dir=\"auto\">\n<li>\u59cb\u7ec8\u5305\u542bdefault\u5206\u652f\u4ee5\u5904\u7406\u610f\u5916\u8f93\u5165\u3002<\/li>\n<li>\u4f7f\u7528break\u9632\u6b62\u610f\u5916\u7684\u201c\u8d2f\u7a7f\u201d\u884c\u4e3a\uff0c\u9664\u975e\u6709\u610f\u5171\u4eab\u903b\u8f91\u3002<\/li>\n<\/ul>\n<h2 dir=\"auto\">\u5faa\u73af\u8bed\u53e5<\/h2>\n<p dir=\"auto\">\u5faa\u73af\u8bed\u53e5\u7528\u4e8e\u6839\u636e\u6761\u4ef6\u6216\u96c6\u5408\u91cd\u590d\u6267\u884c\u4ee3\u7801\u5757\u3002<\/p>\n<h3 dir=\"auto\">1. while\u5faa\u73af<\/h3>\n<p dir=\"auto\">while\u5faa\u73af\u5728\u5e03\u5c14\u6761\u4ef6\u4e3atrue\u65f6\u6301\u7eed\u6267\u884c\uff0c\u9002\u5408\u8fed\u4ee3\u6b21\u6570\u672a\u77e5\u7684\u573a\u666f\u3002<\/p>\n<p dir=\"auto\"><strong>\u8bed\u6cd5<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>java<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>while (\u6761\u4ef6) {\r\n    \/\/ \u91cd\u590d\u6267\u884c\u7684\u4ee3\u7801\r\n}<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u793a\u4f8b<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>java<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>public class WhileExample {\r\n    public static void main(String[] args) {\r\n        int counter = 1;\r\n        while (counter &lt;= 5) {\r\n            System.out.println(\"\u8ba1\u6570\uff1a\" + counter);\r\n            counter++;\r\n        }\r\n    }\r\n}<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u8f93\u51fa<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>text<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>\u8ba1\u6570\uff1a1\r\n\u8ba1\u6570\uff1a2\r\n\u8ba1\u6570\uff1a3\r\n\u8ba1\u6570\uff1a4\r\n\u8ba1\u6570\uff1a5<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<h3 dir=\"auto\">2. do-while\u5faa\u73af<\/h3>\n<p dir=\"auto\">do-while\u5faa\u73af\u81f3\u5c11\u6267\u884c\u4e00\u6b21\uff0c\u56e0\u4e3a\u6761\u4ef6\u5728\u4ee3\u7801\u5757\u6267\u884c\u540e\u624d\u88ab\u8bc4\u4f30\u3002<\/p>\n<p dir=\"auto\"><strong>\u8bed\u6cd5<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>java<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>do {\r\n    \/\/ \u6267\u884c\u7684\u4ee3\u7801\r\n} while (\u6761\u4ef6);<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u793a\u4f8b<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>java<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>public class DoWhileExample {\r\n    public static void main(String[] args) {\r\n        int counter = 1;\r\n        do {\r\n            System.out.println(\"\u8ba1\u6570\uff1a\" + counter);\r\n            counter++;\r\n        } while (counter &lt;= 5);\r\n    }\r\n}<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u8f93\u51fa<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>text<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>\u8ba1\u6570\uff1a1\r\n\u8ba1\u6570\uff1a2\r\n\u8ba1\u6570\uff1a3\r\n\u8ba1\u6570\uff1a4\r\n\u8ba1\u6570\uff1a5<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<h3 dir=\"auto\">3. for\u5faa\u73af<\/h3>\n<p dir=\"auto\">for\u5faa\u73af\u9002\u5408\u5df2\u77e5\u8fed\u4ee3\u6b21\u6570\u7684\u573a\u666f\uff0c\u5c06\u521d\u59cb\u5316\u3001\u6761\u4ef6\u548c\u66f4\u65b0\u6574\u5408\u4e3a\u7b80\u6d01\u7684\u8bed\u6cd5\u3002<\/p>\n<p dir=\"auto\"><strong>\u8bed\u6cd5<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>java<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>for (\u521d\u59cb\u5316; \u6761\u4ef6; \u66f4\u65b0) {\r\n    \/\/ \u91cd\u590d\u6267\u884c\u7684\u4ee3\u7801\r\n}<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u793a\u4f8b<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>java<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>public class ForExample {\r\n    public static void main(String[] args) {\r\n        for (int i = 1; i &lt;= 5; i++) {\r\n            System.out.println(\"\u8fed\u4ee3\uff1a\" + i);\r\n        }\r\n    }\r\n}<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u8f93\u51fa<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>text<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>\u8fed\u4ee3\uff1a1\r\n\u8fed\u4ee3\uff1a2\r\n\u8fed\u4ee3\uff1a3\r\n\u8fed\u4ee3\uff1a4\r\n\u8fed\u4ee3\uff1a5<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<h3 dir=\"auto\">4. \u589e\u5f3a\u578bfor\u5faa\u73af\uff08foreach\uff09<\/h3>\n<p dir=\"auto\">Java 5\u5f15\u5165\u7684\u589e\u5f3a\u578bfor\u5faa\u73af\u7b80\u5316\u4e86\u6570\u7ec4\u6216\u96c6\u5408\u7684\u8fed\u4ee3\u3002<\/p>\n<p dir=\"auto\"><strong>\u8bed\u6cd5<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>java<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>for (\u7c7b\u578b \u53d8\u91cf : \u96c6\u5408) {\r\n    \/\/ \u6267\u884c\u7684\u4ee3\u7801\r\n}<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u793a\u4f8b<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>java<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>public class EnhancedForExample {\r\n    public static void main(String[] args) {\r\n        int[] numbers = {10, 20, 30, 40};\r\n        for (int num : numbers) {\r\n            System.out.print(num + \" \");\r\n        }\r\n    }\r\n}<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u8f93\u51fa<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>text<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>10 20 30 40<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u6700\u4f73\u5b9e\u8df5<\/strong>\uff1a<\/p>\n<ul dir=\"auto\">\n<li>\u4f7f\u7528\u589e\u5f3a\u578bfor\u5faa\u73af\u904d\u5386\u6570\u7ec4\u6216\u96c6\u5408\u4ee5\u63d0\u9ad8\u4ee3\u7801\u53ef\u8bfb\u6027\u3002<\/li>\n<li>\u907f\u514d\u5728\u8fed\u4ee3\u8fc7\u7a0b\u4e2d\u4fee\u6539\u96c6\u5408\uff0c\u4ee5\u9632\u6b62ConcurrentModificationException\u3002<\/li>\n<\/ul>\n<h2 dir=\"auto\">\u8df3\u8f6c\u8bed\u53e5<\/h2>\n<p dir=\"auto\">\u8df3\u8f6c\u8bed\u53e5\u7528\u4e8e\u6539\u53d8\u5faa\u73af\u6216\u65b9\u6cd5\u7684\u6b63\u5e38\u6267\u884c\u6d41\u7a0b\u3002<\/p>\n<h3 dir=\"auto\">1. break\u8bed\u53e5<\/h3>\n<p dir=\"auto\">break\u8bed\u53e5\u9000\u51fa\u6700\u5185\u5c42\u7684\u5faa\u73af\u6216switch\u5757\uff0c\u7ee7\u7eed\u6267\u884c\u540e\u7eed\u8bed\u53e5\u3002<\/p>\n<p dir=\"auto\"><strong>\u793a\u4f8b<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>java<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>public class BreakExample {\r\n    public static void main(String[] args) {\r\n        int[] numbers = {1, 2, 3, 4, 5};\r\n        for (int num : numbers) {\r\n            if (num == 3) {\r\n                break;\r\n            }\r\n            System.out.println(\"\u6570\u5b57\uff1a\" + num);\r\n        }\r\n    }\r\n}<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u8f93\u51fa<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>text<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>\u6570\u5b57\uff1a1\r\n\u6570\u5b57\uff1a2<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<h3 dir=\"auto\">2. continue\u8bed\u53e5<\/h3>\n<p dir=\"auto\">continue\u8bed\u53e5\u8df3\u8fc7\u5f53\u524d\u8fed\u4ee3\uff0c\u76f4\u63a5\u8fdb\u5165\u4e0b\u4e00\u6b21\u5faa\u73af\u3002<\/p>\n<p dir=\"auto\"><strong>\u793a\u4f8b<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>java<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>public class ContinueExample {\r\n    public static void main(String[] args) {\r\n        int[] numbers = {1, 2, 3, 4, 5};\r\n        for (int num : numbers) {\r\n            if (num == 3) {\r\n                continue;\r\n            }\r\n            System.out.println(\"\u6570\u5b57\uff1a\" + num);\r\n        }\r\n    }\r\n}<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u8f93\u51fa<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>text<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>\u6570\u5b57\uff1a1\r\n\u6570\u5b57\uff1a2\r\n\u6570\u5b57\uff1a4\r\n\u6570\u5b57\uff1a5<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<h3 dir=\"auto\">3. return\u8bed\u53e5<\/h3>\n<p dir=\"auto\">return\u8bed\u53e5\u9000\u51fa\u5f53\u524d\u65b9\u6cd5\uff0c\u53ef\u9009\u62e9\u8fd4\u56de\u4e00\u4e2a\u503c\uff0c\u65b9\u6cd5\u540e\u7eed\u4ee3\u7801\u4e0d\u518d\u6267\u884c\u3002<\/p>\n<p dir=\"auto\"><strong>\u793a\u4f8b<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>java<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>public class ReturnExample {\r\n    public static void main(String[] args) {\r\n        int[] numbers = {1, 2, 3, 4, 5};\r\n        for (int num : numbers) {\r\n            if (num == 3) {\r\n                return;\r\n            }\r\n            System.out.println(\"\u6570\u5b57\uff1a\" + num);\r\n        }\r\n        System.out.println(\"\u6b64\u884c\u4e0d\u4f1a\u6267\u884c\");\r\n    }\r\n}<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u8f93\u51fa<\/strong>\uff1a<\/p>\n<div dir=\"auto\">\n<div data-testid=\"code-block\">\n<div>text<\/div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<\/div>\n<div>\n<pre tabindex=\"0\"><code>\u6570\u5b57\uff1a1\r\n\u6570\u5b57\uff1a2<\/code><\/pre>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u5173\u952e\u533a\u522b<\/strong>\uff1a<\/p>\n<ul dir=\"auto\">\n<li>break\u9000\u51fa\u5faa\u73af\uff0c\u4f46\u65b9\u6cd5\u7ee7\u7eed\u6267\u884c\u3002<\/li>\n<li>return\u9000\u51fa\u6574\u4e2a\u65b9\u6cd5\uff0c\u7ec8\u6b62\u540e\u7eed\u6267\u884c\u3002<\/li>\n<\/ul>\n<h2 dir=\"auto\">Java\u63a7\u5236\u8bed\u53e5\u7684\u6700\u4f73\u5b9e\u8df5<\/h2>\n<p dir=\"auto\">\u4e3a\u7f16\u5199\u9ad8\u6548\u4e14\u6613\u4e8e\u7ef4\u62a4\u7684Java\u4ee3\u7801\uff0c\u5efa\u8bae\u9075\u5faa\u4ee5\u4e0b\u5b9e\u8df5\uff1a<\/p>\n<ol dir=\"auto\">\n<li><strong>\u591a\u503c\u9009\u62e9\u65f6\u4f18\u5148\u4f7f\u7528switch<\/strong>\uff1a\n<ul dir=\"auto\">\n<li>\u5904\u7406\u591a\u4e2a\u56fa\u5b9a\u503c\uff08\u5982\u7b49\u7ea7\u3001\u83dc\u5355\u9009\u9879\uff09\u65f6\uff0c\u4f7f\u7528switch\u63d0\u9ad8\u53ef\u8bfb\u6027\uff0c\u4f18\u4e8e\u8fde\u9501\u7684if-else\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u59cb\u7ec8\u5305\u542bswitch\u7684default\u5206\u652f<\/strong>\uff1a\n<ul dir=\"auto\">\n<li>\u901a\u8fc7default\u5206\u652f\u5904\u7406\u610f\u5916\u8f93\u5165\uff0c\u786e\u4fdd\u5065\u58ee\u7684\u9519\u8bef\u5904\u7406\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u4f18\u5148\u4f7f\u7528\u589e\u5f3a\u578bfor\u5faa\u73af<\/strong>\uff1a\n<ul dir=\"auto\">\n<li>\u5728\u65e0\u9700\u7d22\u5f15\u8bbf\u95ee\u7684\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528\u589e\u5f3a\u578bfor\u5faa\u73af\u4ee5\u63d0\u5347\u4ee3\u7801\u6e05\u6670\u5ea6\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u907f\u514d\u5728\u8fed\u4ee3\u4e2d\u4fee\u6539\u96c6\u5408<\/strong>\uff1a\n<ul dir=\"auto\">\n<li>\u5220\u9664\u5143\u7d20\u65f6\uff0c\u4f7f\u7528Iterator\u4ee5\u907f\u514dConcurrentModificationException\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u4fdd\u6301\u6761\u4ef6\u6e05\u6670\u7b80\u6d01<\/strong>\uff1a\n<ul dir=\"auto\">\n<li>\u590d\u6742\u7684if\u6216while\u6761\u4ef6\u5e94\u62c6\u5206\u4e3a\u66f4\u5c0f\u7684\u3001\u53ef\u8bfb\u7684\u90e8\u5206\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u8c28\u614e\u4f7f\u7528break\u548ccontinue<\/strong>\uff1a\n<ul dir=\"auto\">\n<li>\u8fc7\u5ea6\u4f7f\u7528\u53ef\u80fd\u964d\u4f4e\u4ee3\u7801\u53ef\u8bfb\u6027\uff0c\u5fc5\u8981\u65f6\u53ef\u91cd\u6784\u903b\u8f91\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h2 dir=\"auto\">\u63a7\u5236\u8bed\u53e5\u6bd4\u8f83<\/h2>\n<div dir=\"auto\">\n<div>\n<div><\/div>\n<\/div>\n<table dir=\"auto\" data-wide=\"false\">\n<thead>\n<tr>\n<th data-col-size=\"md\"><strong>\u8bed\u53e5<\/strong><\/th>\n<th data-col-size=\"md\"><strong>\u9002\u7528\u573a\u666f<\/strong><\/th>\n<th data-col-size=\"lg\"><strong>\u5173\u952e\u7279\u6027<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td data-col-size=\"md\">if<\/td>\n<td data-col-size=\"md\">\u5355\u4e00\u6761\u4ef6\u68c0\u67e5<\/td>\n<td data-col-size=\"lg\">\u7b80\u5355\u6761\u4ef6\u6267\u884c<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"md\">if-else-if<\/td>\n<td data-col-size=\"md\">\u591a\u4e2a\u987a\u5e8f\u6761\u4ef6<\/td>\n<td data-col-size=\"lg\">\u5904\u7406\u591a\u4e2a\u4e92\u65a5\u60c5\u51b5<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"md\">switch<\/td>\n<td data-col-size=\"md\">\u591a\u4e2a\u79bb\u6563\u503c<\/td>\n<td data-col-size=\"lg\">\u9ad8\u6548\u5904\u7406\u56fa\u5b9a\u503c\u6bd4\u8f83<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"md\">while<\/td>\n<td data-col-size=\"md\">\u8fed\u4ee3\u6b21\u6570\u672a\u77e5<\/td>\n<td data-col-size=\"lg\">\u6267\u884c\u524d\u68c0\u67e5\u6761\u4ef6<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"md\">do-while<\/td>\n<td data-col-size=\"md\">\u81f3\u5c11\u6267\u884c\u4e00\u6b21<\/td>\n<td data-col-size=\"lg\">\u6267\u884c\u540e\u68c0\u67e5\u6761\u4ef6<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"md\">for<\/td>\n<td data-col-size=\"md\">\u5df2\u77e5\u8fed\u4ee3\u6b21\u6570<\/td>\n<td data-col-size=\"lg\">\u6574\u5408\u521d\u59cb\u5316\u3001\u6761\u4ef6\u3001\u66f4\u65b0<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"md\">\u589e\u5f3a\u578bfor<\/td>\n<td data-col-size=\"md\">\u6570\u7ec4\/\u96c6\u5408\u8fed\u4ee3<\/td>\n<td data-col-size=\"lg\">\u8bed\u6cd5\u7b80\u6d01\uff0c\u63d0\u5347\u53ef\u8bfb\u6027<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"md\">break<\/td>\n<td data-col-size=\"md\">\u9000\u51fa\u5faa\u73af\u6216switch<\/td>\n<td data-col-size=\"lg\">\u505c\u6b62\u6700\u5185\u5c42\u5faa\u73af\u6216switch<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"md\">continue<\/td>\n<td data-col-size=\"md\">\u8df3\u5230\u4e0b\u4e00\u6b21\u8fed\u4ee3<\/td>\n<td data-col-size=\"lg\">\u8df3\u8fc7\u5f53\u524d\u8fed\u4ee3<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"md\">return<\/td>\n<td data-col-size=\"md\">\u9000\u51fa\u65b9\u6cd5<\/td>\n<td data-col-size=\"lg\">\u7ec8\u6b62\u65b9\u6cd5\u6267\u884c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2 dir=\"auto\">\u7ed3\u8bba<\/h2>\n<p dir=\"auto\">Java\u63a7\u5236\u8bed\u53e5\u662f\u521b\u5efa\u52a8\u6001\u3001\u9ad8\u6548\u548c\u53ef\u7ef4\u62a4\u7a0b\u5e8f\u7684\u57fa\u77f3\u3002\u901a\u8fc7\u719f\u7ec3\u638c\u63e1if\u3001switch\u3001\u5faa\u73af\u548c\u8df3\u8f6c\u8bed\u53e5\uff0c\u5f00\u53d1\u8005\u80fd\u591f\u7cbe\u786e\u63a7\u5236\u7a0b\u5e8f\u6d41\u7a0b\u3002\u9075\u5faa\u6700\u4f73\u5b9e\u8df5\uff0c\u4f8b\u5982\u5728\u591a\u6761\u4ef6\u573a\u666f\u4e2d\u4f7f\u7528switch\u6216\u5728\u96c6\u5408\u8fed\u4ee3\u4e2d\u4f7f\u7528\u589e\u5f3a\u578bfor\u5faa\u73af\uff0c\u53ef\u4ee5\u786e\u4fdd\u4ee3\u7801\u7b80\u6d01\u4e14\u6027\u80fd\u4f18\u8d8a\u3002\u53c2\u8003\u672c\u6587\u63d0\u4f9b\u7684\u793a\u4f8b\u548c\u6307\u5357\uff0c\u63d0\u5347\u60a8\u7684Java\u7f16\u7a0b\u6280\u80fd\uff0c\u6784\u5efa\u5065\u58ee\u7684\u5e94\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u63a7\u5236\u8bed\u53e5\u662f\u63a7\u5236\u7a0b\u5e8f\u6267\u884c\u6d41&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-208398","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208398","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=208398"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208398\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=208398"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=208398"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=208398"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}