{"id":31337,"date":"2023-04-28T20:26:25","date_gmt":"2023-03-09T13:29:28","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%85%b3%e4%ba%8ejava%e7%9a%84switch%e8%af%ad%e5%8f%a5\/"},"modified":"2025-08-12T23:30:54","modified_gmt":"2025-08-12T15:30:54","slug":"%e5%85%b3%e4%ba%8ejava%e7%9a%84switch%e8%af%ad%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%85%b3%e4%ba%8ejava%e7%9a%84switch%e8%af%ad%e5%8f%a5\/","title":{"rendered":"\u5173\u4e8eJava\u7684switch\u8bed\u53e5"},"content":{"rendered":"<p>\u6211\u4f1a\u8bb0\u4e0b\u4eca\u5929\u5b66\u5230\u7684\u4e1c\u897f\uff0c\u4ee5\u514d\u5fd8\u8bb0\u3002<\/p>\n<h2>switch\u8bed\u53e5\u662f\u4ec0\u4e48\uff1f<\/h2>\n<p>\u548cif\u8bed\u53e5\u4e00\u6837\uff0c\u7528\u4e8e\u6761\u4ef6\u5206\u652f\u3002<br \/>\nif\u8bed\u53e5\u4f1a\u5bfc\u81f4\u6e90\u4ee3\u7801\u53d8\u5f97\u96be\u4ee5\u9605\u8bfb\uff0c\u5c24\u5176\u662f\u5f53\u6709\u591a\u79cd\u5206\u652f\u60c5\u51b5\u65f6\uff0c\u800cswitch\u8bed\u53e5\u53ef\u4ee5\u6e05\u6670\u5730\u5199\u51fa\u591a\u4e2a\u5206\u652f\u60c5\u51b5\u3002<\/p>\n<p>\u5982\u679c\u5206\u652f\u8f83\u5c11\uff0c\u53ef\u4ee5\u4f7f\u7528if\u8bed\u53e5\uff1b\u5982\u679c\u5206\u652f\u8f83\u591a\uff0c\u5219\u5e94\u4f7f\u7528switch\u8bed\u53e5\u4ee5\u63d0\u9ad8\u53ef\u8bfb\u6027\u3002<\/p>\n<h2>\u57fa\u672c\u53e5\u6cd5<\/h2>\n<pre class=\"post-pre\"><code>switch(\u5f0f){\r\n case \u50241:\r\n  \u51e6\u74061\r\n  break;\r\n case \u50242:\r\n  \u51e6\u74062\r\n  break;\r\n case \u50243:\r\n  \u51e6\u74063\r\n  break;\r\n default:\r\n  \u51e6\u74064\r\n  break;\r\n}\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>switch ( \u5f0f ) {\r\n\tcase \u50241:\r\n\tcase \u50242:\r\n\t\t\u51e6\u7406\uff11;\r\n\t\tbreak;\r\n\tcase \u50243:\r\n\tcase \u50244:\r\n\t\t\u51e6\u7406\uff12\r\n\t\tbreak;\r\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000default:\r\n  \u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u51e6\u7406\uff13\r\n  \u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000break;\r\n}\r\n<\/code><\/pre>\n<p>\u5728switch\u7684\u62ec\u53f7\u5185\u5199\u5165\u8868\u8fbe\u5f0f\u3002\u7136\u540e\uff0c\u7528&#8221;case \u25ef\u25ef&#8221;\u8868\u793a\u6bd4\u8f83\u8be5\u8868\u8fbe\u5f0f\u7684\u503c\u3002<br \/>\n\u5728\u5176\u4e0b\u65b9\uff0c\u63cf\u8ff0\u5f53\u8868\u8fbe\u5f0f\u548c\u503c\u5339\u914d\u65f6\u8981\u6267\u884c\u7684\u64cd\u4f5c\u3002\u6700\u540e\u5199\u4e0a&#8221;break&#8221;\u3002\u4ee5\u6b64\u65b9\u5f0f\uff0c\u7f16\u5199\u591a\u4e2a&#8221;case \u25ef\u25ef&#8221;\u3002<\/p>\n<p>\u6309\u7167\u4ece\u4e0a\u5230\u4e0b\u7684\u987a\u5e8f\uff0c\u201ccase\u201d\u4f1a\u88ab\u5904\u7406\uff0c\u5982\u679c\u8868\u8fbe\u5f0f\u548c\u503c\u5339\u914d\uff0c\u5219\u901a\u8fc7\u201cbreak\u201d\u5f3a\u5236\u7ec8\u6b62switch\u8bed\u53e5\uff0c\u56e0\u6b64\u540e\u9762\u5199\u7684\u5904\u7406\u5c06\u4e0d\u4f1a\u88ab\u6267\u884c\u3002<\/p>\n<p>\u5982\u679c\u5728\u8bed\u6cd5\u7ed3\u67842\u4e2d\u6709\u4e00\u65b9\u7684\u300ccase\u300d\u4e0e\u4e4b\u76f8\u5339\u914d\uff0c\u5219\u6267\u884c\u5904\u7406\u3002<\/p>\n<p>\u5982\u679c\u6ca1\u6709\u5339\u914d\u5230\u4efb\u4f55\u503c\uff0c\u5219\u6267\u884c\u201cdefault\u201d\u7684\u5904\u7406\u3002<\/p>\n<h2>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d<\/h2>\n<pre class=\"post-pre\"><code>int num = \uff11;\r\n\r\n switch(num){\r\n  case 1:\r\n   System.out.println(\"\u4e00\u7b49\u8cde\");\r\n  break;\r\n  case 2:\r\n   System.out.println(\"\u4e8c\u7b49\u8cde\");\r\n  break;\r\n  default:\r\n\tSystem.out.println(\"\u6b8b\u5ff5\u8cde\");\r\n  }\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>int num = 2;\r\n\r\n\u3000\u3000switch(num){\r\n\u3000\u3000\u3000\u3000\u3000case 1:\r\n\u3000\u3000\u3000\u3000\u3000case 2:\r\n\tSystem.out.println(\"\u4e00\u7b49\u8cde\");\r\n\u3000\u3000\u3000\u3000\u3000break;\r\n\u3000\u3000\u3000\u3000\u3000case 3:\r\n\u3000\u3000\u3000\u3000\u3000case 4:\r\n\tSystem.out.println(\"\u4e8c\u7b49\u8cde\");\r\n   break;\r\n\u3000\u3000\u3000\u3000\u3000default:\r\n\tSystem.out.println(\"\u6b8b\u5ff5\u8cde\");  \r\n\u3000\u3000\u3000\u3000\u3000}\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0a\u5c31\u662f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6211\u4f1a\u8bb0\u4e0b\u4eca\u5929\u5b66\u5230\u7684\u4e1c\u897f\uff0c\u4ee5\u514d\u5fd8\u8bb0\u3002 switch\u8bed\u53e5\u662f\u4ec0\u4e48\uff1f \u548cif\u8bed\u53e5\u4e00\u6837\uff0c\u7528\u4e8e\u6761\u4ef6\u5206\u652f\u3002 if\u8bed\u53e5\u4f1a\u5bfc\u81f4\u6e90 [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-31337","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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