{"id":79,"date":"2024-02-20T04:24:32","date_gmt":"2024-03-08T08:01:30","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/%e5%a6%82%e4%bd%95%e5%9c%a8java%e4%b8%ad%e7%bc%96%e5%86%99%e6%9d%a1%e4%bb%b6%e8%af%ad%e5%8f%a5\/"},"modified":"2025-07-31T22:32:26","modified_gmt":"2025-07-31T14:32:26","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8java%e4%b8%ad%e7%bc%96%e5%86%99%e6%9d%a1%e4%bb%b6%e8%af%ad%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%a6%82%e4%bd%95%e5%9c%a8java%e4%b8%ad%e7%bc%96%e5%86%99%e6%9d%a1%e4%bb%b6%e8%af%ad%e5%8f%a5\/","title":{"rendered":"Java\u6761\u4ef6\u8bed\u53e5\u7cbe\u901a\u6307\u5357\uff1a\u4ece\u57fa\u7840\u5230\u9ad8\u7ea7\u5e94\u7528"},"content":{"rendered":"

\u4f5c\u8005\u9009\u62e9\u4e3a\u5199\u4f5c\u6309\u6350\u8d60\u8ba1\u5212\u4e4b\u4e00\u6350\u8d60\u6b3e\u9879\u7ed9\u81ea\u7531\u5f00\u6e90\u57fa\u91d1\u3002<\/p>\n

\u5f15\u8a00<\/h3>\n

\u6761\u4ef6\u8bed\u53e5\u6539\u53d8\u7a0b\u5e8f\u7684\u6d41\u7a0b\u3002\u6761\u4ef6\u8bed\u53e5\u4e5f\u88ab\u79f0\u4e3a\u5206\u652f\u8bed\u53e5\uff0c\u56e0\u4e3a\u5f53\u6761\u4ef6\u5339\u914d\u65f6\uff0c\u6d41\u7a0b\u4f1a\u8fdb\u5165\u4ee3\u7801\u7684\u4e00\u4e2a\u5206\u652f\u3002\u5982\u679c\u6761\u4ef6\u4e0d\u6ee1\u8db3\uff0c\u5219\u4f1a\u8bc4\u4f30\u53e6\u4e00\u4e2a\u6761\u4ef6\uff08\u5982\u679c\u6709\u7684\u8bdd\uff09\u3002\u8be5\u8bc4\u4f30\u4f1a\u7ee7\u7eed\uff0c\u76f4\u5230\u6240\u6709\u6761\u4ef6\u90fd\u88ab\u8bc4\u4f30\u4e3a\u771f\u6216\u5047\u4e3a\u6b62\u3002\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6761\u4ef6\u8bed\u53e5\u6765\u6bd4\u8f83\u4e24\u4e2a\u6570\u5b57\uff08x\u548cy\uff09\uff1ax > y\u3001x = y\u548cx < y\u3002\u5982\u679cx\u7b49\u4e8e1\uff0cy\u7b49\u4e8e2\uff0c\u5219\u4f1a\u8fdb\u884c\u4e09\u6b21\u8bc4\u4f30\uff0c\u76f4\u5230\u6700\u7ec8\u7684x < y\u6761\u4ef6\u8bed\u53e5\u8bc4\u4f30\u4e3a\u771f\u3002<\/p>\n

\u6709\u4e24\u79cd\u6761\u4ef6\u8bed\u53e5\u3002\u7b2c\u4e00\u79cd\u7c7b\u578b\u662fif<\/code>\u4ee5\u53ca\u5b83\u7684\u6269\u5c55\u5f62\u5f0felse if<\/code>\u3002\u8fd9\u79cd\u7c7b\u578b\u88ab\u5e7f\u6cdb\u4f7f\u7528\u3002\u7b2c\u4e8c\u79cd\u7c7b\u578b\u662fswitch<\/code>\uff0c\u66f4\u5177\u4f53\u4e14\u9650\u5236\u8f83\u591a\u3002<\/p>\n

\u5728\u672c\u6559\u7a0b\u4e2d\uff0c\u4f60\u5c06\u4f1a\u7528Java\u7f16\u5199\u6761\u4ef6\u8bed\u53e5\uff0c\u5e76\u5b66\u4e60\u6bcf\u79cd\u7c7b\u578b\u7684\u4f7f\u7528\u60c5\u51b5\u3001\u4f18\u70b9\u548c\u7f3a\u70b9\u3002<\/p>\n

\u5148\u51b3\u6761\u4ef6<\/h2>\n

\u8981\u8ddf\u968f\u672c\u6559\u7a0b\uff0c\u60a8\u9700\u8981\uff1a<\/p>\n

    \n
  • \u4e00\u4e2a\u53ef\u4ee5\u6267\u884cJava\u7a0b\u5e8f\u7684\u73af\u5883\uff0c\u4ee5\u4fbf\u8ddf\u968f\u793a\u4f8b\u3002\u8981\u5728\u60a8\u7684\u672c\u5730\u673a\u5668\u4e0a\u8fdb\u884c\u8bbe\u7f6e\uff0c\u60a8\u5c06\u9700\u8981\u4ee5\u4e0b\u5185\u5bb9\uff1a\n

    \u60a8\u7684\u673a\u5668\u4e0a\u5b89\u88c5\u4e86Java\uff08\u7248\u672c11\u6216\u66f4\u9ad8\uff09\uff0c\u5e76\u5e26\u6709Java\u5f00\u53d1\u5de5\u5177\u5305\uff08JDK\uff09\u63d0\u4f9b\u7684\u7f16\u8bd1\u5668\u3002\u5bf9\u4e8eUbuntu\u548cDebian\uff0c\u8bf7\u9075\u5faa\u6211\u4eec\u6559\u7a0b\u300a\u5982\u4f55\u5728Ubuntu 22.04\u4e0a\u4f7f\u7528Apt\u5b89\u88c5Java\u300b\u4e2d\u9009\u98791\u7684\u6b65\u9aa4\u3002\u5bf9\u4e8e\u5176\u4ed6\u64cd\u4f5c\u7cfb\u7edf\uff0c\u5305\u62ecMac\u548cWindows\uff0c\u8bf7\u9075\u5faaJava\u5b89\u88c5\u7684\u4e0b\u8f7d\u9009\u9879\u3002
    \u4e3a\u4e86\u7f16\u8bd1\u548c\u8fd0\u884c\u4ee3\u7801\u793a\u4f8b\uff0c\u672c\u6559\u7a0b\u4f7f\u7528Java Shell\uff0c\u5b83\u662f\u4e00\u4e2a\u4ece\u547d\u4ee4\u884c\u8fd0\u884c\u7684\u8bfb\u53d6-\u8bc4\u4f30-\u6253\u5370\u5faa\u73af\uff08REPL\uff09\u3002\u8981\u5f00\u59cb\u4f7f\u7528JShell\uff0c\u8bf7\u67e5\u9605\u300aJShell\u7b80\u4ecb\u300b\u6307\u5357\u3002<\/li>\n

  • \u719f\u6089Java\u548c\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff0c\u60a8\u53ef\u4ee5\u5728\u6211\u4eec\u7684\u6559\u7a0b\u300a\u5982\u4f55\u7f16\u5199\u60a8\u7684\u7b2c\u4e00\u4e2aJava\u7a0b\u5e8f\u300b\u4e2d\u627e\u5230\u3002<\/li>\n
  • \u7406\u89e3Java\u6570\u636e\u7c7b\u578b\uff0c\u8fd9\u5728\u6211\u4eec\u7684\u6559\u7a0b\u300a\u7406\u89e3Java\u4e2d\u7684\u6570\u636e\u7c7b\u578b\u300b\u4e2d\u6709\u6240\u8ba8\u8bba\u3002<\/li>\n<\/ul>\n

    \u533a\u5206\u8bed\u53e5\u548c\u5757<\/h2>\n

    \u5f53\u6ee1\u8db3\u6761\u4ef6\u8bed\u53e5\u5e76\u4e14\u6267\u884c\u6d41\u7a0b\u88ab\u5f15\u5bfc\u5230\u76f8\u5e94\u7684\u4ee3\u7801\u5206\u652f\u65f6\uff0c\u8be5\u5206\u652f\u53ef\u4ee5\u662f\u5355\u4e2a\u8bed\u53e5\u6216\u4e00\u5757\u4ee3\u7801\u3002\u7531\u4e8e\u8bed\u53e5\u548c\u4ee3\u7801\u5757\u7684\u5904\u7406\u65b9\u5f0f\u4e0d\u540c\uff0c\u56e0\u6b64\u533a\u5206\u5b83\u4eec\u975e\u5e38\u91cd\u8981\u3002<\/p>\n

    \u4e00\u6761\u8bed\u53e5\u662f\u4e00\u4e2a\u6267\u884c\u5355\u5143\uff0c\u901a\u5e38\u4ee5\u5206\u53f7\u7ed3\u675f\uff0c\u53ea\u5360\u7528\u4e00\u884c\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0b\u9762\u7684\u8bed\u53e5\u6253\u5370\u793a\u4f8b\uff1a<\/p>\n

    1. \">System.out.println(<\/span>\"example\"<\/span>)<\/span>;<\/span><\/li><\/ol><\/code><\/pre>\n
      \n
      \n
      \u4fe1\u606f<\/p>\n
      \n
      \u4e3a\u4e86\u8ddf\u968f\u672c\u6559\u7a0b\u4e2d\u7684\u793a\u4f8b\u4ee3\u7801\uff0c\u901a\u8fc7\u8fd0\u884cjshell<\/code>\u547d\u4ee4\u5728\u60a8\u7684\u672c\u5730\u7cfb\u7edf\u4e0a\u6253\u5f00Java Shell\u5de5\u5177\u3002\u7136\u540e\u53ef\u4ee5\u901a\u8fc7\u5728jshell><\/code>\u63d0\u793a\u7b26\u540e\u6dfb\u52a0\u5e76\u6309ENTER\u8fdb\u884c\u590d\u5236\u3001\u7c98\u8d34\u6216\u7f16\u8f91\u793a\u4f8b\u3002\u8981\u9000\u51fajshell\uff0c\u8bf7\u8f93\u5165\/exit<\/code>\u3002<\/p>\n<\/div>\n<\/div>\n
      \u6b64\u8bed\u53e5\u4f7f\u7528println()<\/code>\u65b9\u6cd5\u6765\u6253\u5370\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u5728\u8fd9\u4e2a\u6848\u4f8b\u4e2d\u4e3a\u201cexample\u201d\u3002\u9664\u975e\u53e6\u6709\u6307\u793a\uff0cJava\u5c06\u65e0\u6761\u4ef6\u6267\u884c\u6b64\u8bed\u53e5\u3002<\/p>\n
      \n
      \n
      \u6ce8\u610f<\/p>\n
      \n
      \u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u4e3a\u4e86\u4f7f\u8bed\u53e5\u66f4\u6613\u8bfb\uff0c\u4f1a\u5c06\u5176\u5199\u5728\u4e00\u884c\u4e0a\u3002\u7136\u800c\uff0c\u6839\u636e\u5b98\u65b9\u7ea6\u5b9a\u6307\u5357\uff0c\u5e94\u907f\u514d\u8d85\u8fc780\u4e2a\u5b57\u7b26\u7684\u884c\u3002\u5982\u679c\u60a8\u7684\u8bed\u53e5\u8d85\u8fc780\u4e2a\u5b57\u7b26\uff0c\u5e94\u5c06\u5176\u62c6\u5206\u6210\u591a\u884c\u3002<\/p>\n
      \u6b64\u5916\uff0c\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u5982\u4f7f\u7528lambda\u8868\u8fbe\u5f0f\u65f6\uff0c\u5c06\u8bed\u53e5\u5206\u6563\u5230\u51e0\u884c\u4e2d\u66f4\u65b9\u4fbf\u3001\u76f4\u89c2\u3002\u65e0\u8bba\u5982\u4f55\uff0cJava\u5bf9\u8bed\u53e5\u4e2d\u7684\u6362\u884c\u6ca1\u6709\u8bed\u6cd5\u8981\u6c42\uff0c\u60a8\u53ef\u4ee5\u5728\u65b0\u7684\u4e00\u884c\u4e0a\u7ee7\u7eed\u8bed\u53e5\u3002\u4f5c\u4e3a\u7ec3\u4e60\uff0c\u5c1d\u8bd5\u91cd\u5199\u672c\u6559\u7a0b\u4e2d\u7684\u67d0\u4e9b\u793a\u4f8b\uff0c\u5e76\u5c06\u8bed\u53e5\u5206\u9694\u5230\u591a\u884c\u4e0a\u3002<\/p>\n<\/div>\n<\/div>\n
      \u5f53\u4f60\u5c06\u8bed\u53e5\u5206\u7ec4\u4ee5\u4fbf\u4e00\u8d77\u6267\u884c\u65f6\uff0c\u4f60\u4f7f\u7528\u7684\u662f\u4e00\u4e2a\u4ee3\u7801\u5757\u3002\u4ee3\u7801\u5757\u662f\u4ee5\u5de6\u5927\u62ec\u53f7\uff08{<\/code>\uff09\u5f00\u5934\uff0c\u4ee5\u53f3\u5927\u62ec\u53f7\uff08}<\/code>\uff09\u7ed3\u5c3e\u7684\u96f6\u4e2a\u6216\u591a\u4e2a\u8bed\u53e5\u7684\u96c6\u5408\u3002\u4f60\u53ef\u4ee5\u50cf\u4e0b\u9762\u8fd9\u6837\u91cd\u65b0\u5199\u524d\u9762\u7684\u4ee3\u7801\u5e76\u5c06\u5176\u653e\u5165\u4e00\u4e2a\u4ee3\u7801\u5757\u4e2d\uff1a<\/p>\n
      1. \">{<\/span><\/li>
      2. \">    System.out.println(<\/span>\"example\"<\/span>)<\/span>;<\/span><\/li>
      3. \">}<\/span><\/li><\/ol><\/code><\/pre>\n
        \u5728\u4e0a\u9762\u7684\u4ee3\u7801\u5757\u4e2d\uff0c\u60a8\u5728System.out.println(\"example\");<\/code>\u4e4b\u524d\u4f7f\u7528\u4e86\u56db\u4e2a\u7a7a\u683c\u3002\u8fd9\u56db\u4e2a\u7a7a\u683c\u88ab\u79f0\u4e3a\u7f29\u8fdb\u3002\u4e0ePython\u7b49\u5176\u4ed6\u7f16\u7a0b\u8bed\u8a00\u4e0d\u540c\uff0c\u5728Java\u4e2d\u7f29\u8fdb\u65e2\u4e0d\u662f\u5fc5\u9700\u7684\uff0c\u4e5f\u4e0d\u4f1a\u5f71\u54cd\u4ee3\u7801\u3002\u7136\u800c\uff0c\u4e3a\u4e86\u66f4\u597d\u7684\u53ef\u8bfb\u6027\uff0c\u5e76\u4e14\u6309\u7167\u7ea6\u5b9a\uff0c\u5757\u5185\u7684\u4ee3\u7801\u884c\u4ee5\u56db\u4e2a\u7a7a\u683c\u7684\u7f29\u8fdb\u5f00\u59cb\u3002\u5927\u591a\u6570\u4ee3\u7801\u7f16\u8f91\u5668\u90fd\u652f\u6301\u81ea\u52a8\u7f29\u8fdb\uff0c\u4f46\u662f\u7ea6\u5b9a\u5728\u4e0d\u540c\u7684\u7f16\u7a0b\u8bed\u8a00\u751a\u81f3\u7f16\u8f91\u5668\u4e4b\u95f4\u53ef\u80fd\u4f1a\u6709\u6240\u4e0d\u540c\u3002\u56e0\u6b64\uff0c\u5982\u679c\u60a8\u7684\u4ee3\u7801\u7f16\u8f91\u5668\u652f\u6301\u7f29\u8fdb\uff0c\u8bf7\u786e\u4fdd\u5728\u7f16\u5199Java\u4ee3\u7801\u65f6\u5c06\u5176\u8bbe\u7f6e\u4e3a\u56db\u4e2a\u7a7a\u683c\u3002Jshell\u5728\u672c\u6559\u7a0b\u4e2d\u63a8\u8350\u4f7f\u7528\uff0c\u5e76\u81ea\u52a8\u5c06\u56db\u4e2a\u7a7a\u683c\u8bbe\u7f6e\u4e3a\u7f29\u8fdb\u3002<\/p>\n
        \u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5c06\u4ee3\u7801\u653e\u5728\u4e00\u4e2a\u5757\u5185\u4e0d\u4f1a\u6709\u4efb\u4f55\u533a\u522b\uff0c\u56e0\u4e3a\u6ca1\u6709\u6761\u4ef6\u3002\u56e0\u6b64\uff0c\u65e0\u8bba\u8bed\u53e5\u662f\u5426\u5728\u5757\u5185\uff0c\u793a\u4f8b\u90fd\u5c06\u88ab\u6253\u5370\u51fa\u6765\u3002\u5f53\u4f60\u5728jshell\u4e2d\u8fd0\u884c\u8fd9\u4e24\u4e2a\u5148\u524d\u7684\u793a\u4f8b\u65f6\uff0c\u4f60\u5c06\u5728\u4e24\u79cd\u60c5\u51b5\u4e0b\u6536\u5230\u76f8\u540c\u7684\u8f93\u51fa\u3002<\/p>\n
        \u8f93\u51fa<\/div>example<\/code><\/pre>\n
        \u4ee5\u4e0a\u7684\u8f93\u51fa\u7ed3\u679c\u663e\u793a\uff0c\u5728\u4e00\u4e2a\u4ee3\u7801\u5757\u5185\u6216\u8005\u5728\u4ee3\u7801\u5757\u5916\u9762\u6253\u5370\u793a\u4f8b\u7684\u8bed\u53e5\u662f\u4ee5\u76f8\u540c\u7684\u65b9\u5f0f\u5de5\u4f5c\u7684\u3002<\/p>\n
        \u5728\u672c\u8282\u4e2d\uff0c\u60a8\u4e86\u89e3\u5230\u4e86\u8bed\u53e5\u3001\u4ee3\u7801\u5757\u4ee5\u53ca\u5982\u4f55\u521b\u5efa\u5b83\u4eec\u3002\u4e0b\u4e00\u8282\u4e2d\uff0c\u60a8\u5c06\u5411\u4ee3\u7801\u5757\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u6761\u4ef6\u8bed\u53e5\u3002\u56e0\u6b64\uff0c\u4ee3\u7801\u5757\u5185\u7684\u8bed\u53e5\u5c06\u4f1a\u4e00\u8d77\u5e76\u4e14\u6709\u6761\u4ef6\u5730\u6267\u884c\u3002<\/p>\n
        \u4f7f\u7528\u5355\u4e00\u7684\u6761\u4ef6\u8bed\u53e5<\/h2>\n
        \u6700\u5e38\u7528\u7684\u6761\u4ef6\u8bed\u53e5\u662fif<\/code>\u8bed\u53e5\u3002\u53ea\u8981\u6bd4\u8f83\u7ed3\u679c\u662f\u5e03\u5c14\u503c\uff08\u771f\u6216\u5047\uff09\uff0c\u5b83\u5c31\u662f\u901a\u7528\u7684\u5e76\u6ee1\u8db3\u6240\u6709\u6761\u4ef6\u6bd4\u8f83\u7684\u9700\u6c42\u3002if<\/code>\u6761\u4ef6\u8bed\u53e5\u53ef\u4ee5\u662f\u6700\u7b80\u5355\u5f62\u5f0f\u7684\u5355\u4e00\u6761\u4ef6\uff0c\u4e5f\u53ef\u4ee5\u6709\u66f4\u590d\u6742\u7684\u7ed3\u6784\uff0c\u5728\u540e\u9762\u7684\u90e8\u5206\u4e2d\u4f60\u5c06\u4f1a\u4f7f\u7528\u5230\u3002<\/p>\n
        \u5355\u4e2aif<\/code>\u8bed\u53e5\u7528\u4e8e\u5728\u5355\u4e2a\u6761\u4ef6\u4e0b\u6267\u884c\u4e00\u6bb5\u4ee3\u7801\u3002\u60a8\u5c06\u4f1a\u5c06\u6761\u4ef6\u6267\u884c\u7684\u4ee3\u7801\u653e\u5728\u4e00\u4e2a\u4ee3\u7801\u5757\u4e2d\uff0c\u5e76\u5728\u5f00\u5934\u653e\u7f6eif (\u5e03\u5c14\u8868\u8fbe\u5f0f)<\/code>\u3002\u53ea\u6709\u5f53\u8868\u8fbe\u5f0f\u53ca\u5176\u6761\u4ef6\u4e3a\u771f\u65f6\uff0c\u4ee3\u7801\u5757\u624d\u4f1a\u88ab\u6267\u884c\u3002\u5982\u679c\u8868\u8fbe\u5f0f\u7684\u7ed3\u679c\u4e3a\u5047\uff0c\u5219\u6761\u4ef6\u5757\u7684\u4ee3\u7801\u5c06\u88ab\u8df3\u8fc7\u3002<\/p>\n
        \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u4f60\u5c06\u7f16\u5199\u4e00\u4e2a\u4ee3\u7801\u7247\u6bb5\u6765\u6bd4\u8f83\u4e24\u4e2a\u6570\u5b57\u3002\u6839\u636e\u6bd4\u8f83\u7684\u7ed3\u679c\uff0c\u53ef\u80fd\u4f1a\u6253\u5370\u4e00\u6761\u6d88\u606f\u3002\u5c06\u4ee5\u4e0b\u884c\u6dfb\u52a0\u5230jshell\u4e2d\uff1a<\/p>\n
        1. int<\/span> x =<\/span> 1<\/span>;<\/span><\/li>
        2. int<\/span> y =<\/span> 0<\/span>;<\/span><\/li>
        3. if<\/span> (<\/span>x ><\/span> y)<\/span><\/mark> {<\/span><\/li>
        4.     System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>x +<\/span> \" is bigger than \"<\/span> +<\/span> y)<\/span>;<\/span><\/li>
        5. }<\/span><\/li><\/ol><\/code><\/pre>\n
          \u5728\u524d\u4e24\u884c\u4e2d\uff0c\u60a8\u5b9a\u4e49\u4e86\u4e24\u4e2a\u53d8\u91cf\uff1ax<\/code>\u548cy<\/code>\u3002\u7b2c\u4e09\u884c\u662f\u6761\u4ef6\u8bed\u53e5if (x > y)<\/code>\uff0c\u5b83\u6bd4\u8f83\u4e86x<\/code>\u662f\u5426\u5927\u4e8ey<\/code>\u3002\u6bd4\u8f83\u64cd\u4f5c\u901a\u5e38\u4f4d\u4e8e\u62ec\u53f7\u4e2d\u3002<\/p>\n
          \u5757\u4ee3\u7801\u4ee5\u7b2c\u4e00\u4e2a\u5f00\u62ec\u53f7\uff08{<\/code>\uff09\u5f00\u59cb\uff0c\u4ee5\u95ed\u62ec\u53f7\uff08}<\/code>\uff09\u7ed3\u675f\u3002\u5728\u5757\u5185\uff0c\u4e00\u4e2a\u8bed\u53e5\u4f7f\u7528println()<\/code>\u65b9\u6cd5\u6765\u6253\u5370\u51fa\u201cx\u5927\u4e8ey\u201d\u3002\u53ea\u6709\u5f53\u8fd9\u4e2a\u6761\u4ef6\u4e3a\u771f\u65f6\uff0c\u5757\u4ee3\u7801\u624d\u4f1a\u88ab\u6267\u884c\u3002<\/p>\n
          \u5f53\u4f60\u5728jshell\u4e2d\u8fd0\u884c\u6b64\u4ee3\u7801\u65f6\uff0c\u5c06\u4f1a\u5f97\u5230\u4ee5\u4e0b\u8f93\u51fa\uff1a<\/p>\n
          \u8fd9\u662f\u6587\u7ae0\u300a\u5982\u4f55\u5728Java\u4e2d\u7f16\u5199\u6761\u4ef6\u8bed\u53e5\u300b\u7684\u7b2c2\u90e8\u5206\uff08\u51715\u90e8\u5206\uff09\u3002<\/p>\n
          Outputx ==> 1\r\ny ==> 0\r\n1 is bigger than 0\r\n<\/code><\/pre>\n
          \u8f93\u51fa\u7684\u524d\u4e24\u884c\u786e\u8ba4\u4e86x\u548cy\u7684\u503c\u3002\u7b2c\u4e09\u884c\u8868\u793a1\u5927\u4e8e0\uff0c\u8fd9\u610f\u5473\u7740\u6761\u4ef6\u8bed\u53e5\u4e3a\u771f\uff1ax\u5927\u4e8ey\u3002\u5982\u679c\u4f60\u5c06x\u6539\u4e3a\u5c0f\u4e8ey\uff0c\u90a3\u4e48\u8be5\u6d88\u606f\u5c06\u4e0d\u4f1a\u88ab\u6253\u5370\u3002<\/p>\n
          \u5728\u6761\u4ef6\u8bed\u53e5\u4e2d\uff0c\u6700\u91cd\u8981\u7684\u89c4\u5219\u662f\u8bc4\u4f30\u7684\u8868\u8fbe\u5f0f\u5fc5\u987b\u8fd4\u56de\u4e00\u4e2a\u5e03\u5c14\u503c\u3002\u5426\u5219\uff0c\u5728\u4efb\u4f55\u5176\u4ed6\u60c5\u51b5\u4e0b\uff0c\u90fd\u4f1a\u51fa\u73b0\u9519\u8bef\uff0c\u56e0\u4e3a\u4f60\u6240\u6bd4\u8f83\u7684\u5185\u5bb9\u65e0\u6cd5\u8f6c\u6362\u4e3a\u5e03\u5c14\u503c\u3002<\/p>\n
          \u4e3a\u4e86\u8fdb\u4e00\u6b65\u7ec3\u4e60\uff0c\u8bf7\u5c1d\u8bd5\u4f7f\u7528\u975e\u5e03\u5c14\u8868\u8fbe\u5f0f\u5f15\u53d1\u9519\u8bef\u3002\u4e3a\u6b64\uff0c\u5c06\u4e00\u4e2a\u4e0d\u80fd\u8f6c\u6362\u4e3a\u5e03\u5c14\u503c\u7684\u6574\u6570\u53d8\u91cf\u653e\u7f6e\u5728\u6761\u4ef6\u62ec\u53f7\u4e2d\uff0c\u50cf\u8fd9\u6837\uff1a<\/p>\n
            \r\n
          1. int x =<\/span> 1<\/span>;<\/span>\r\n<\/li>\r\n
          2. if<\/span> (<\/span>x)<\/span><\/mark> {<\/span>\r\n<\/li>\r\n
          3.     System.out.println(<\/span>\"Will this work?\"<\/span>)<\/span>;<\/span>\r\n<\/li>\r\n
          4. }<\/span>\r\n<\/li>\r\n<\/ol>\r\n<\/code><\/pre>\n
            \u5728\u7b2c\u4e00\u884c\uff0c\u4f60\u5b9a\u4e49\u4e86\u4e00\u4e2a\u6574\u6570\u53d8\u91cfx\uff0c\u5e76\u7ed9\u5b83\u8d4b\u4e86\u4e00\u4e2a\u503c\uff081\uff09\u3002\u7b2c\u4e8c\u884c\u662f\u6761\u4ef6if (x)<\/code>\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u7a0b\u5e8f\u5d29\u6e83\uff0c\u56e0\u4e3ax\u4e0d\u80fd\u8f6c\u6362\u4e3a\u5e03\u5c14\u503c\u3002\u5f53\u4f60\u5728jshell\u4e2d\u8fd0\u884c\u4ee5\u4e0a\u4ee3\u7801\u65f6\uff0c\u4f60\u5c06\u4f1a\u5f97\u5230\u4ee5\u4e0b\u9519\u8bef\uff1a<\/p>\n
            Outputx ==> 1\r\n|  Error:\r\n|  incompatible types: int cannot be converted to boolean\r\n|  if (x) {\r\n|      ^\r\n<\/code><\/pre>\n
            \u7b2c\u4e00\u884c\u786e\u8ba4x\u63a5\u6536\u5230\u503c1\u3002\u63a5\u4e0b\u6765\u7684\u51e0\u884c\u63cf\u8ff0\u4e86\u4e0d\u517c\u5bb9\u7c7b\u578b\u7684\u9519\u8bef\uff0c\u5e76\u89e3\u91ca\u4e86\u4e00\u4e2a\u6574\u6570\u503c\uff08\u5982x\uff09\u65e0\u6cd5\u8f6c\u6362\u4e3a\u5e03\u5c14\u503c\u3002\u6bcf\u5f53\u4f60\u9047\u5230\u8fd9\u6837\u7684\u9519\u8bef\uff0c\u4f60\u5c31\u9700\u8981\u4ed4\u7ec6\u68c0\u67e5\u4f60\u7684\u6bd4\u8f83\u3002<\/p>\n
            \u50cf\u8fd9\u6837\u7684\u975e\u5e03\u5c14\u6761\u4ef6\u8bed\u53e5\u53ef\u80fd\u662f\u6761\u4ef6\u8bed\u53e5\u4e2d\u6700\u5e38\u89c1\u7684\u9677\u9631\u3002\u5e78\u8fd0\u7684\u662f\uff0c\u73b0\u4ee3\u96c6\u6210\u5f00\u53d1\u73af\u5883\uff08IDE\uff09\u5728\u7f16\u5199\u65f6\u5c31\u80fd\u6355\u6349\u5230\u8fd9\u79cd\u9519\u8bef\u3002\u5373\u4f7f\u60a8\u6ca1\u6709\u4f7f\u7528IDE\uff0c\u9519\u8bef\u4ecd\u7136\u5f88\u5bb9\u6613\u53d1\u73b0\u3002<\/p>\n
            \u5728\u6ca1\u6709\u4ee3\u7801\u5757\u7684\u60c5\u51b5\u4e0b\u7f16\u5199\u6761\u4ef6 if \u8bed\u53e5<\/h2>\n
            Java\u7684if\u6761\u4ef6\u8bed\u53e5\u7684\u4e00\u4e2a\u7279\u70b9\u662f\u53ef\u4ee5\u4ee5\u66f4\u77ed\u7684\u65b9\u5f0f\u4e66\u5199\uff0c\u800c\u4e0d\u9700\u8981\u4f7f\u7528\u4ee3\u7801\u5757\u3002\u867d\u7136\u4e0d\u5efa\u8bae\u5728\u4e0d\u4f7f\u7528\u4ee3\u7801\u5757\u7684\u60c5\u51b5\u4e0b\u4f7f\u7528\u6761\u4ef6\u8bed\u53e5\uff0c\u4f46\u4f60\u5e94\u8be5\u4e86\u89e3\u5230\u8fd9\u79cd\u4e66\u5199\u65b9\u5f0f\u662f\u53ef\u884c\u7684\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u5982\u679c\u4f60\u5728\u5b66\u4e60Java\u8003\u8bd5\u6216\u53c2\u52a0\u5de5\u4f5c\u9762\u8bd5\u65f6\uff0c\u53ef\u80fd\u4f1a\u9047\u5230\u7c7b\u4f3c\u7684\u4ee4\u4eba\u56f0\u60d1\u7684\u4f8b\u5b50\uff0c\u6240\u4ee5\u4f60\u5e94\u8be5\u505a\u597d\u51c6\u5907\u3002<\/p>\n
            \u4e3e\u4e2a\u4f8b\u5b50\uff0c\u4f60\u53ef\u4ee5\u4e0d\u7528\u4e00\u6574\u5757\u7684\u4ee3\u7801\uff0c\u800c\u662f\u5199\u4e00\u4e2a\u50cf\u8fd9\u6837\u7684\u8bed\u53e5\u3002<\/p>\n
              \r\n
            1. int<\/span> x =<\/span> 1<\/span>;<\/span>\r\n<\/li>\r\n
            2. int<\/span> y =<\/span> 0<\/span>;<\/span>\r\n<\/li>\r\n
            3. if<\/span> (<\/span>x ><\/span> y)<\/span><\/mark>\r\n<\/li>\r\n
            4.     System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>x +<\/span> \" is bigger than \"<\/span> +<\/span> y)<\/span>;<\/span>\r\n<\/li>\r\n<\/ol>\r\n<\/code><\/pre>\n
              \u4e0e\u524d\u9762\u7684\u4f8b\u5b50\u4e0d\u540c\u4e4b\u5904\u5728\u4e8e\uff0c\u5728\u6761\u4ef6\u8bed\u53e5 if (x > y)<\/code> \u4e4b\u540e\u6ca1\u6709\u4ee3\u7801\u5757\u3002\u76f8\u53cd\uff0c\u5728\u6761\u4ef6\u8bed\u53e5 if (x > y)<\/code> \u4e4b\u540e\u7d27\u63a5\u7740\u7684\u5c31\u662f\u76ee\u6807\u8bed\u53e5 System.out.println(x + \" is bigger than \" + y)<\/code>\u3002<\/p>\n
              \u5f53\u4f60\u5728jshell\u4e2d\u8fd0\u884c\u6b64\u4ee3\u7801\u65f6\uff0c\u4f60\u5c06\u5f97\u5230\u4e0e\u5148\u524d\u793a\u4f8b\u76f8\u540c\u7684\u8f93\u51fa\u7ed3\u679c\u3002<\/p>\n
              Outputx ==> 1\r\ny ==> 0\r\n1 is bigger than 0\r\n<\/code><\/pre>\n
              x\u548cy\u7684\u503c\u5c06\u6253\u5370\u5728\u524d\u4e24\u884c\u30021\u5927\u4e8e0\u7684\u786e\u8ba4\u6d88\u606f\u5c06\u5728\u7b2c\u4e09\u884c\u6253\u5370\u3002<\/p>\n
              \u5f53\u6761\u4ef6\u8bed\u53e5\u540e\u6ca1\u6709\u4ee3\u7801\u5757\u65f6\uff0c\u53ea\u6709\u7d27\u63a5\u5728\u6761\u4ef6\u8bed\u53e5\u540e\u7684\u4e00\u884c\u4f9d\u8d56\u4e8e\u8be5\u6761\u4ef6\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u65e0\u8bba\u6761\u4ef6\u5982\u4f55\uff0c\u5728\u7b2c4\u884c\u4e4b\u540e\u7684\u4efb\u4f55\u8bed\u53e5\u90fd\u4f1a\u6267\u884c\u3002\u4f8b\u5982\uff0c\u5c1d\u8bd5\u5c06 x \u66f4\u6539\u4e3a 0\uff0c\u4f7f\u5176\u4e0d\u5927\u4e8e y\uff0c\u5e76\u6dfb\u52a0\u5982\u4e0b\u7684\u7b2c\u4e94\u884c\u4ee3\u7801\uff1a<\/p>\n
                \r\n
              1. int<\/span> x =<\/span> 0<\/span><\/mark>;<\/span>\r\n<\/li>\r\n
              2. int<\/span> y =<\/span> 0<\/span>;<\/span>\r\n<\/li>\r\n
              3. if<\/span> (<\/span>x ><\/span> y)<\/span>\r\n<\/li>\r\n
              4.     System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>x +<\/span> \" is bigger than \"<\/span> +<\/span> y)<\/span>;<\/span>\r\n<\/li>\r\n
              5.     System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>\"This line is always printed.\"<\/span>)<\/span>;<\/span><\/mark>\r\n<\/li>\r\n<\/ol>\r\n<\/code><\/pre>\n
                \u5f53\u4f60\u5728jshell\u4e2d\u8fd0\u884c\u4e0a\u8ff0\u4ee3\u7801\u65f6\uff0c\u4f60\u5c06\u4f1a\u5f97\u5230\u4ee5\u4e0b\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n
                Outputx ==> 0\r\ny ==> 0\r\nThis line is always printed.\r\n<\/code><\/pre>\n
                \u6b64\u5916\uff0c\u7b2c5\u884c\u7684\u7f29\u8fdb\u662f\u4e0d\u5fc5\u8981\u7684\u3002\u5b83\u53ea\u662f\u4e3a\u4e86\u6697\u793a\u7b2c5\u884c\u7684\u6267\u884c\u53d6\u51b3\u4e8e\u6761\u4ef6\uff0c\u800c\u5b9e\u9645\u60c5\u51b5\u5e76\u975e\u5982\u6b64\u3002\u53ef\u4ee5\u7701\u7565\u6b64\u7f29\u8fdb\uff0c\u4f46\u8fd9\u5e76\u4e0d\u4f1a\u4f7f\u4ee3\u7801\u66f4\u6e05\u6670\u3002<\/p>\n
                \u4f7f\u7528\u6ca1\u6709\u4ee3\u7801\u5757\u7684\u6761\u4ef6\u8bed\u53e5\u65e2\u4e0d\u76f4\u89c2\u4e5f\u4e0d\u6613\u4e8e\u8ffd\u8e2a\uff0c\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u4f60\u5e94\u8be5\u8c28\u614e\u4f7f\u7528\u7b80\u5199\u8bed\u6cd5\u7684\u539f\u56e0\u3002\u4e3a\u4e86\u4fdd\u6301\u4ee3\u7801\u7684\u6574\u6d01\u548c\u53ef\u8bfb\u6027\uff0c\u6700\u597d\u4f7f\u7528\u4ee3\u7801\u5757\u8bed\u53e5\uff0c\u56e0\u4e3a\u5b83\u4eec\u66f4\u6613\u8bfb\uff0c\u5e76\u4e14\u5141\u8bb8\u4f60\u7f16\u5199\u591a\u884c\u6709\u6761\u4ef6\u6267\u884c\u7684\u4ee3\u7801\u3002<\/p>\n
                \u5d4c\u5957\u7684if\u8bed\u53e5\u662f\u4e00\u79cd\u53ef\u4ee5\u7f16\u5199\u4f46\u901a\u5e38\u4e0d\u63a8\u8350\u7684\u4ee3\u7801\u793a\u4f8b\u3002\u5728\u4e0b\u4e00\u8282\u4e2d\uff0c\u4f60\u5c06\u63a2\u7d22\u5d4c\u5957\u7684if\u8bed\u53e5\uff0c\u4ee5\u66f4\u597d\u5730\u7406\u89e3\u5b83\u4eec\u7684\u4ef7\u503c\u548c\u7f3a\u70b9\u3002<\/p>\n
                \u5d4c\u5957\u7684If\u8bed\u53e5<\/h2>\n
                \u4e3a\u4e86\u521b\u5efa\u66f4\u590d\u6742\u7684\u6761\u4ef6\u7ed3\u6784\uff0c\u53ef\u4ee5\u5c06\u8bb8\u591aif\u8bed\u53e5\u7ec4\u5408\u8d77\u6765\u3002\u8981\u521b\u5efa\u5d4c\u5957\u7684if\u8bed\u53e5\uff0c\u53ef\u4ee5\u5c06\u53e6\u4e00\u4e2aif\u8bed\u53e5\u653e\u7f6e\u5728\u7236if\u8bed\u53e5\u5185\u90e8\u800c\u4e0d\u662f\u5728\u4ee3\u7801\u5757\u4e2d\u3002<\/p>\n
                \u8fd9\u79cd\u505a\u6cd5\u901a\u5e38\u4e0d\u88ab\u63a8\u8350\uff0c\u56e0\u4e3a\u5b83\u4f1a\u4f7f\u4f60\u7684\u4ee3\u7801\u53d8\u5f97\u66f4\u96be\u9605\u8bfb\u548c\u7406\u89e3\u3002\u7136\u800c\uff0c\u5d4c\u5957\u7684if\u8bed\u53e5\u6709\u65f6\u786e\u5b9e\u5177\u6709\u5b9e\u9645\u7528\u9014\uff0c\u56e0\u6b64\u719f\u6089\u5b83\u4eec\u4f1a\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n
                \u4e3a\u4e86\u7406\u89e3\u5982\u4f55\u5b9e\u73b0\u8fd9\u4e00\u70b9\uff0c\u4f60\u9700\u8981\u901a\u8fc7\u6dfb\u52a0\u4e00\u4e2aif\u8bed\u53e5\u6765\u6269\u5c55\u4e4b\u524d\u7684\u4f8b\u5b50\u3002\u4f60\u5c06\u518d\u6b21\u5c06y\u4e0e0\u8fdb\u884c\u6bd4\u8f83\u4ee5\u8bc4\u4f30\u5b83\u4eec\u662f\u5426\u76f8\u7b49\u3002\u8bf7\u5c06\u4ee5\u4e0b\u4ee3\u7801\u6dfb\u52a0\u5230JShell\u4e2d\u3002<\/p>\n
                1. int<\/span> x =<\/span> 1<\/span>;<\/span><\/li>
                2. int<\/span> y =<\/span> 0<\/span>;<\/span><\/li>
                3. if<\/span> (<\/span>x ><\/span> y)<\/span> {<\/span><\/li>
                4.   if<\/span> (<\/span>y ==<\/span> 0<\/span>)<\/span><\/mark> {<\/span><\/li>
                5.     System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>\"This is legal but does not look clean.\"<\/span>)<\/span>;<\/span><\/li>
                6.   }<\/span><\/li>
                7. }<\/span><\/li><\/ol><\/code><\/pre>\n
                  \u524d\u4e09\u884c\u4e0e\u4e4b\u524d\u7684\u793a\u4f8b\u4fdd\u6301\u4e0d\u53d8\uff1a\u5b9a\u4e49\u4e86\u4e24\u4e2a\u6574\u578b\u53d8\u91cf\uff08x\u548cy\uff09\u5e76\u8fdb\u884c\u6bd4\u8f83\u3002\u7b2c\u56db\u884c\uff0c\u53e6\u4e00\u4e2aif\u8bed\u53e5\u6bd4\u8f83y\u662f\u5426\u7b49\u4e8e0\u3002\u5982\u679c\u4e3a\u771f\uff0cJava\u5c06\u6267\u884c\u7b2c\u4e94\u884c\uff0c\u5176\u4e2d\u6709\u4e00\u4e2a\u5e26\u6709\u6d88\u606f\u201c\u8fd9\u662f\u5408\u6cd5\u7684\uff0c\u4f46\u4e0d\u591f\u7b80\u6d01\u201d\u7684println()<\/code>\u8bed\u53e5\u3002<\/p>\n
                  \u5f53\u4f60\u5728JShell\u4e2d\u8fd0\u884c\u6b64\u547d\u4ee4\u65f6\uff0c\u4f60\u5c06\u5f97\u5230\u4ee5\u4e0b\u8f93\u51fa\uff1a<\/p>\n
                  Output<\/div>x ==> 1\r\ny ==> 0\r\nThis is legal but does not look clean.\r\n<\/code><\/pre>\n
                  \u524d\u4e24\u884c\u786e\u8ba4\u4e86x\u548cy\u7684\u503c\u3002\u7b2c\u4e09\u884c\u663e\u793a\uff1a\u201c\u8fd9\u662f\u5408\u6cd5\u7684\uff0c\u4f46\u770b\u8d77\u6765\u4e0d\u5e72\u51c0\u3002\u201d\u8be5\u6d88\u606f\u786e\u8ba4\u4ee3\u7801\u5757\u5df2\u7ecf\u6267\u884c\uff0c\u56e0\u4e3aif\u6761\u4ef6\u90fd\u6ee1\u8db3\uff1ax > y\u548cy == 0\u3002<\/p>\n
                  \u4f60\u53ef\u4ee5\u65e0\u9650\u5d4c\u5957if\u8bed\u53e5\u3002\u7136\u800c\uff0c\u6bcf\u4e2a\u5d4c\u5957\u7684if\u8bed\u53e5\u90fd\u4f1a\u589e\u52a0\u4ee3\u7801\u7684\u590d\u6742\u6027\uff0c\u964d\u4f4e\u5176\u53ef\u8bfb\u6027\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u5d4c\u5957if\u8bed\u53e5\u901a\u5e38\u4e0d\u88ab\u8ba4\u4e3a\u662f\u826f\u597d\u7684\u7f16\u7a0b\u5b9e\u8df5\u3002<\/p>\n
                  \u7136\u800c\uff0c\u5d4c\u5957\u7684\u6761\u4ef6\u7ed3\u6784\u786e\u5b9e\u5177\u6709\u4e00\u4e9b\u5b9e\u9645\u5e94\u7528\u3002\u6709\u65f6\uff0c\u4e3a\u4e86\u7f16\u5199\u66f4\u77ed\u7684\u4ee3\u7801\u5e76\u8282\u7701\u65f6\u95f4\uff0c\u727a\u7272\u53ef\u8bfb\u6027\u5e76\u589e\u52a0\u590d\u6742\u6027\u53ef\u80fd\u662f\u503c\u5f97\u7684\u3002\u56e0\u6b64\uff0c\u5728\u8003\u8bd5\u3001\u9762\u8bd5\u6216\u5b9e\u9645\u751f\u4ea7\u4ee3\u7801\u4e2d\uff0c\u60a8\u53ef\u80fd\u4f1a\u9047\u5230\u5d4c\u5957\u8bed\u53e5\u3002<\/p>\n
                  \u4f7f\u7528\u6269\u5c55\u7684\u6761\u4ef6\u8bed\u53e5\u4e0eElse If\u548cElse\u8bed\u53e5<\/h2>\n
                  \u5982\u679c\u4f7f\u7528else if<\/code>\u548celse<\/code>\u8865\u5145\u8bed\u53e5\uff0c\u6761\u4ef6\u8bed\u53e5\u53ef\u4ee5\u8fdb\u4e00\u6b65\u6269\u5c55\u4ee5\u5904\u7406\u989d\u5916\u7684\u5339\u914d\u6807\u51c6\u3002else<\/code>\u8bed\u53e5\u53ea\u80fd\u5728\u521d\u59cbif<\/code>\u8bed\u53e5\u4e4b\u540e\u4f7f\u7528\u3002\u4f7f\u7528else if<\/code>\uff0c\u4f60\u53ef\u4ee5\u6dfb\u52a0\u65e0\u9650\u591a\u4e2a\u989d\u5916\u7684\u6761\u4ef6\u8bed\u53e5\uff0c\u7c7b\u4f3c\u4e8e\u7b2c\u4e00\u4e2aif<\/code>\u3002\u4f7f\u7528\u6700\u540e\u7684\u53ef\u9009else<\/code>\uff0c\u4f60\u53ef\u4ee5\u6307\u5b9a\u5728\u6ca1\u6709\u4e4b\u524d\u7684\u6761\u4ef6\u8bed\u53e5\u5339\u914d\u65f6\u7a0b\u5e8f\u6d41\u5e94\u8be5\u9075\u5faa\u7684\u9ed8\u8ba4\u8def\u5f84\u3002<\/p>\n
                  \u901a\u8fc7\u4f7f\u7528else if<\/code>\u548celse<\/code>\uff0c\u4f60\u53ef\u4ee5\u5c06\u7a0b\u5e8f\u6d41\u5206\u652f\u5230\u6bd4\u5355\u4e2aif<\/code>\u66f4\u591a\u7684\u65b9\u5411\u3002\u56e0\u6b64\uff0c\u4f60\u53ef\u4ee5\u6784\u5efa\u65e0\u6cd5\u4ee5\u5176\u4ed6\u65b9\u5f0f\u6784\u5efa\u7684\u590d\u6742\u6761\u4ef6\u7ed3\u6784\u3002\u5728\u4e0d\u540c\u7684\u65b9\u5411\u4e0a\u5206\u652f\u4ee3\u7801\u53ef\u4ee5\u5e2e\u52a9\u4f60\u5904\u7406\u66f4\u590d\u6742\u7684\u4e1a\u52a1\u60c5\u51b5\u3002\u7136\u800c\uff0c\u751f\u4ea7\u73af\u5883\u4e2d\u7684\u4e1a\u52a1\u9700\u6c42\u4f17\u591a\uff0c\u5e76\u4e14\u8bbe\u8ba1\u6d41\u7a0b\u4e0d\u4e00\u5b9a\u662f\u76f4\u63a5\u7684\u3002<\/p>\n
                  \u4f7f\u7528\u4e0b\u9762\u7684\u4ee3\u7801\u793a\u4f8b\u6765\u4e86\u89e3else if<\/code>\u548celse<\/code>\u8bed\u53e5\u7684\u6982\u5ff5\u3002\u4f60\u5c06\u6269\u5c55\u4e4b\u524d\u4f7f\u7528\u7684\u4ee3\u7801\u5e76\u6dfb\u52a0\u66f4\u591a\u7684\u6761\u4ef6\u5206\u652f\u3002\u8fd9\u4e9b\u65b0\u7684\u6761\u4ef6\u5c06\u7ee7\u7eed\u6bd4\u8f83x\u548cy\u3002<\/p>\n
                  \u8fd9\u662f\u6587\u7ae0\u300a\u5982\u4f55\u5728Java\u4e2d\u7f16\u5199\u6761\u4ef6\u8bed\u53e5\u300b\u7684\u7b2c4\u90e8\u5206\uff08\u51715\u90e8\u5206\uff09\u3002<\/p>\n
                    \r\n
                  1. int<\/span> x =<\/span> 1<\/span>;<\/span><\/li>\r\n
                  2. int<\/span> y =<\/span> 0<\/span>;<\/span><\/li>\r\n
                  3. if<\/span> (<\/span>x ><\/span> y)<\/span> {<\/span><\/li>\r\n
                  4.     System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>x +<\/span> \" is bigger than \"<\/span> +<\/span> y)<\/span>;<\/span><\/li>\r\n
                  5. }<\/span> else<\/span> if<\/span> (<\/span>x <<\/span> y)<\/span> {<\/span><\/li>\r\n
                  6.     System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>y +<\/span> \" is bigger than \"<\/span> +<\/span> x)<\/span>;<\/span><\/li>\r\n
                  7. }<\/span> else<\/span> if<\/span> (<\/span>x ==<\/span> y)<\/span> {<\/span><\/li>\r\n
                  8.     System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>x +<\/span> \" is equal to \"<\/span> +<\/span> y)<\/span>;<\/span><\/li>\r\n
                  9. }<\/span> else<\/span> {<\/span><\/li>\r\n
                  10.     System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>x +<\/span> \" cannot be compared to \"<\/span> +<\/span> y)<\/span>;<\/span><\/li>\r\n
                  11. }<\/span><\/li>\r\n<\/ol>\r\n<\/code><\/pre>\n
                    \u6839\u636e\u4e0a\u8ff0\u4ee3\u7801\uff0c\u7b2c1\u884c\u548c\u7b2c2\u884c\u5b9a\u4e49\u4e86\u4e24\u4e2a\u53d8\u91cfx<\/code>\u548cy<\/code>\uff0c\u5b83\u4eec\u7684\u503c\u5206\u522b\u4e3a1\u548c0\u3002\u5728\u7b2c3\u884c\u548c\u7b2c4\u884c\u4e2d\uff0c\u4f7f\u7528if<\/code>\u8bed\u53e5\u8bc4\u4f30x<\/code>\u662f\u5426\u5927\u4e8ey<\/code>\u3002\u5982\u679c\u8bc4\u4f30\u7ed3\u679c\u4e3a\u771f\uff0c\u5219\u6253\u5370\u6587\u672c\u201cx\u5927\u4e8ey\u201d\u5e76\u9000\u51fa\u6761\u4ef6\u7ed3\u6784\u3002\u5982\u679c\u8bc4\u4f30\u7ed3\u679c\u4e3a\u5047\uff0c\u5219\u7a0b\u5e8f\u5c06\u7ee7\u7eed\u6267\u884c\u4e0b\u4e00\u4e2a\u6761\u4ef6\u3002\u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u4ee3\u7801\u4e0e\u4e4b\u524d\u7684\u793a\u4f8b\u76f8\u540c\u3002<\/p>\n
                    \u5728\u7b2c5\u884c\uff0c\u5728if<\/code>\u8bed\u53e5\u7684\u95ed\u5408\u62ec\u53f7\u4e4b\u540e\uff0c\u7d27\u8ddf\u7740\u4e00\u4e2aelse if<\/code>\u8bed\u53e5\u3002\u5b83\u5177\u6709\u7c7b\u4f3c\u4e8eif<\/code>\u8bed\u53e5\u7684\u8bed\u6cd5\uff1a\u62ec\u53f7\u5185\u6709\u4e00\u4e2a\u5e03\u5c14\u8868\u8fbe\u5f0f\uff0c\u5e76\u4e14\u540e\u9762\u8ddf\u6709\u4e00\u6bb5\u4ee3\u7801\u5757\u3002\u8be5\u8868\u8fbe\u5f0f\u8bc4\u4f30y<\/code>\u662f\u5426\u5927\u4e8ex<\/code>\uff0c\u4e0e\u4e0a\u4e00\u4e2aif<\/code>\u8bed\u53e5\u76f8\u53cd\u3002\u5982\u679c\u8868\u8fbe\u5f0f\u4e3a\u771f\uff0c\u5219\u5c06\u6267\u884c\u5176\u540e\u7684\u4ee3\u7801\u5757\uff0c\u518d\u6b21\u9000\u51fa\u6761\u4ef6\u7ed3\u6784\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u8fd9\u662f\u7b2c6\u884c\u7684\u8bed\u53e5\uff0c\u5c06\u6253\u5370\u51fa\u201cy\u5927\u4e8ex\u201d\u3002<\/p>\n
                    \u5728\u7b2c7\u884c\u662f\u53e6\u4e00\u4e2aelse if<\/code>\u6761\u4ef6\u8bed\u53e5\u3002\u8fd9\u6b21\uff0c\u60a8\u5728\u62ec\u53f7\u4e2d\u68c0\u67e5x<\/code>\u662f\u5426\u7b49\u4e8ey<\/code>\u3002\u5982\u679c\u4e3a\u771f\uff0c\u5219\u5c06\u6267\u884c\u7b2c8\u884c\u7684\u8bed\u53e5\uff0c\u5e76\u6253\u5370\u201cx\u7b49\u4e8ey\u201d\u3002\u6b64\u7c7belse if<\/code>\u8bed\u53e5\u53ef\u4ee5\u65e0\u9650\u6dfb\u52a0\uff0c\u4e00\u4e2a\u63a5\u4e00\u4e2a\u5730\u8bc4\u4f30\u4e0d\u540c\u7684\u6761\u4ef6\u3002<\/p>\n
                    \u5728\u7b2c9\u884c\u51fa\u73b0\u4e86\u6700\u7ec8\u7684else<\/code>\u8bed\u53e5\u3002\u5b83\u59cb\u7ec8\u662f\u6700\u540e\u4e00\u4e2a\uff0c\u4e14\u6ca1\u6709\u6761\u4ef6\uff0c\u8fd9\u610f\u5473\u7740\u5982\u679c\u4e4b\u524d\u6ca1\u6709\u5339\u914d\u7684\u6761\u4ef6\u8bed\u53e5\uff0c\u5176\u5206\u652f\u603b\u662f\u4f1a\u6267\u884c\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u5728\u6ca1\u6709\u6ee1\u8db3if<\/code>\u6216else if<\/code>\u6761\u4ef6\u7684\u60c5\u51b5\u4e0b\uff0c\u4f1a\u6267\u884celse<\/code>\u540e\u9762\u7684\u4ee3\u7801\u5757\u3002\u5982\u679c\u8fd9\u662f\u771f\u7684\uff0c\u90a3\u4e48\u7b2c10\u884c\u4e0a\u7684\u4ee3\u7801\u5c06\u4f1a\u6267\u884c\uff0c\u5e76\u6253\u5370\u51fa\u201cx\u4e0d\u80fd\u4e0ey\u8fdb\u884c\u6bd4\u8f83\u201d\u3002<\/p>\n
                    \u5728\u8fd9\u79cd\u590d\u6742\u7684\u6761\u4ef6\u7ed3\u6784\u4e2d\uff0c\u53ea\u9700\u8981\u7b2c\u4e00\u4e2aif<\/code>\u8bed\u53e5\u3002\u5982\u679c\u4f60\u60f3\u8981\u8fdb\u884c\u989d\u5916\u7684\u6bd4\u8f83\uff0c\u53ef\u4ee5\u4f7f\u7528\u96f6\u4e2a\u6216\u591a\u4e2aelse if<\/code>\u8bed\u53e5\u3002\u6700\u540e\uff0c\u4f60\u53ef\u4ee5\u52a0\u4e0a\u4e00\u4e2a\u53ef\u9009\u7684else<\/code>\u8bed\u53e5\uff0c\u4ee5\u5339\u914d\u5176\u4ed6\u6761\u4ef6\u90fd\u4e0d\u6ee1\u8db3\u7684\u60c5\u51b5\u3002<\/p>\n
                    \u5f53\u60a8\u5728jshell\u4e2d\u8fd0\u884c\u4e0a\u8ff0\u4ee3\u7801\u65f6\uff0c\u60a8\u5c06\u83b7\u5f97\u4ee5\u4e0b\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n
                    Output<\/div>\r\nx ==> 1\r\ny ==> 0\r\n1 is bigger than 0\r\n<\/code><\/pre>\n
                    \u4ece\u4e0a\u9762\u7684\u8f93\u51fa\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u7b2c\u4e00\u884c\u548c\u7b2c\u4e8c\u884c\u786e\u8ba4\u4e86x<\/code>\u548cy<\/code>\u7684\u503c\u5206\u522b\u4e3a1\u548c0\u3002\u7b2c\u4e09\u884c\u8f93\u51fa\u201c1\u5927\u4e8e0\u201d\uff0c\u8bc1\u5b9e\u4e86\u5e03\u5c14\u8868\u8fbe\u5f0f\uff08x > y<\/code>\uff09\u8fd4\u56de\u4e86true<\/code>\uff0c\u5e76\u4e14\u5728\u5176\u540e\u7684\u4ee3\u7801\u5757\u5df2\u7ecf\u88ab\u6267\u884c\u3002<\/p>\n
                    \u7f16\u5199if<\/code>\u3001else if<\/code>\u548celse<\/code>\u8bed\u53e5\u662f\u7f16\u5199\u590d\u6742\u6761\u4ef6\u7ed3\u6784\u7684\u597d\u65b9\u6cd5\uff0c\u56e0\u4e3a\u60a8\u53ef\u4ee5\u5728\u6bcf\u4e2aif<\/code>\u548celse if<\/code>\u8bed\u53e5\u4e2d\u653e\u7f6e\u4e0d\u540c\u7684\u6761\u4ef6\u3002\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u60a8\u9996\u5148\u6bd4\u8f83\u4e86x > y<\/code>\uff0c\u7136\u540e\u662f\u76f8\u53cd\u6761\u4ef6x < y<\/code>\uff0c\u6700\u540e\u662fx == y<\/code>\u3002\u5373\u4f7f\u5728\u53ea\u8fdb\u884c\u4e86\u5c11\u6570\u6bd4\u8f83\u7684\u60c5\u51b5\u4e0b\uff0c\u4ee3\u7801\u4ecd\u7136\u6613\u8bfb\u4e14\u6613\u4e8e\u7ba1\u7406\u3002<\/p>\n
                    \u7136\u800c\uff0c\u5982\u679c\u4f60\u9700\u8981\u8fdb\u884c\u66f4\u591a\u7684\u6bd4\u8f83\uff0c\u6dfb\u52a0\u66f4\u591a\u7684else if<\/code>\u8bed\u53e5\u4f1a\u4f7f\u4ee3\u7801\u96be\u4ee5\u7406\u89e3\u751a\u81f3\u4ee4\u4eba\u56f0\u60d1\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u5728\u53ef\u80fd\u7684\u60c5\u51b5\u4e0b\u5e94\u8be5\u4f7f\u4f60\u7684\u7ed3\u6784\u5c0f\u800c\u7b80\u5355\u7684\u539f\u56e0\u3002\u6b64\u5916\uff0c\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528switch<\/code>\u8bed\u53e5\u53ef\u4ee5\u66ff\u4ee3\u8fd9\u79cd\u590d\u6742\u7684\u7ed3\u6784\uff0c\u4f60\u5c06\u5728\u4e0b\u4e00\u90e8\u5206\u4e2d\u4f7f\u7528\u5b83\u3002<\/p>\n
                    \u4f7f\u7528switch<\/code>\u6761\u4ef6<\/h2>\n
                    switch<\/code>\u8bed\u53e5\u662f\u53e6\u4e00\u79cd\u53ef\u7528\u4e8e\u6784\u5efa\u51b3\u7b56\u7ed3\u6784\u7684\u6761\u4ef6\u8bed\u53e5\u3002\u5b83\u4e0eif<\/code>\u8bed\u53e5\u7c7b\u4f3c\uff0c\u56e0\u4e3a\u5b83\u53ef\u4ee5\u7528\u4e8e\u6709\u6761\u4ef6\u5730\u63a7\u5236\u7a0b\u5e8f\u6d41\u7a0b\u3002\u7136\u800c\uff0cswitch<\/code>\u8bed\u53e5\u53ea\u9002\u7528\u4e8e\u5355\u4e00\u53d8\u91cf\uff0c\u5e76\u5c06\u5176\u4e0e\u4e0d\u540c\u7684\u9884\u5b9a\u4e49\u60c5\u51b5\u8fdb\u884c\u5339\u914d\u3002\u56e0\u6b64\uff0c\u60a8\u4e0d\u80fd\u8bc4\u4f30\u8bf8\u5982 x > y<\/code> \u8fd9\u6837\u7684\u5e03\u5c14\u8868\u8fbe\u5f0f\u3002\u76f8\u53cd\uff0c\u60a8\u53ef\u4ee5\u6709\u4e00\u4e2aint<\/code>\u53d8\u91cf\uff0c\u5e76\u5c06\u5176\u503c\u4e0e\u5176\u4ed6int<\/code>\u53d8\u91cf\u8fdb\u884c\u5339\u914d\uff1b\u5f53\u5339\u914d\u6210\u529f\uff08\u5373case<\/code>\u60c5\u51b5\uff09\uff0c\u7a0b\u5e8f\u6d41\u7a0b\u5c06\u6839\u636e\u5339\u914d\u7ed3\u679c\u8fdb\u884c\u91cd\u5b9a\u5411\u3002<\/p>\n
                    switch<\/code>\u6761\u4ef6\u8bed\u53e5\u6709\u4e24\u4e2a\u91cd\u8981\u7684\u89c4\u5219\u3002\u7b2c\u4e00\u4e2a\u89c4\u5219\u662f\u6bd4\u8f83\u7684\u53d8\u91cf\u53ea\u80fd\u662f\u7279\u5b9a\u7684\u6570\u636e\u7c7b\u578b\uff0c\u6bd4\u5982\u539f\u59cb\u7c7b\u578bint<\/code>\u548cchar<\/code>\uff0c\u4ee5\u53ca\u5f15\u7528\u7c7b\u578bString<\/code>\u548cInteger<\/code>\u3002\uff08\u652f\u6301\u7684\u6570\u636e\u7c7b\u578b\u5b8c\u6574\u5217\u8868\u53ef\u4ee5\u5728\u5b98\u65b9switch<\/code>\u6587\u6863\u4e2d\u627e\u5230\u3002\uff09\u56e0\u6b64\uff0c\u4f60\u4e0d\u80fd\u4f7f\u7528\u5e03\u5c14\u53d8\u91cf\uff0c\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48switch<\/code>\u6761\u4ef6\u8bed\u53e5\u4e0d\u80fd\u5b8c\u5168\u66ff\u4ee3if<\/code>\u6761\u4ef6\u8bed\u53e5\u7684\u539f\u56e0\u3002<\/p>\n
                    \u53e6\u4e00\u4e2a\u91cd\u8981\u7684\u89c4\u5219\u662fcase<\/code>\u8bed\u53e5\u7684\u503c\u5fc5\u987b\u662f\u5b57\u9762\u5e38\u91cf\u6216\u5e38\u91cf\u3002\u5e38\u91cf\u7c7b\u4f3c\u4e8e\u53d8\u91cf\uff0c\u4f46\u5728\u5b9a\u4e49\u65f6\u524d\u9762\u52a0\u4e0a\u5173\u952e\u8bcdfinal<\/code>\u3002\u4e0e\u53d8\u91cf\u76f8\u6bd4\uff0c\u4e00\u65e6\u5e38\u91cf\u88ab\u5b9a\u4e49\uff0c\u5176\u503c\u4e0d\u80fd\u6539\u53d8\u3002\u6211\u4eec\u7684Java\u7cfb\u5217\u6559\u7a0b\u5c06\u5728\u672a\u6765\u8be6\u7ec6\u4ecb\u7ecd\u5e38\u91cf\u3002<\/p>\n
                    switch<\/code>\u7ed3\u6784\u6bd4if<\/code>\u7ed3\u6784\u66f4\u52a0\u6709\u9650\uff0c\u5b83\u5e76\u4e0d\u5b8c\u5168\u66ff\u4ee3if<\/code>\u7ed3\u6784\u3002\u7136\u800c\uff0cswitch<\/code>\u7ed3\u6784\u5177\u6709\u66f4\u9ad8\u7684\u53ef\u8bfb\u6027\uff0c\u5e76\u4e14\u5728\u53ef\u884c\u7684\u60c5\u51b5\u4e0b\u9002\u7528\u4e8e\u66f4\u591a\u7684\u6bd4\u8f83\uff0c\u8fd9\u662f\u5b83\u72ec\u7279\u7684\u4f18\u52bf\u3002<\/p>\n
                    \u4f8b\u5982\uff0c\u8bbe\u60f3\u60a8\u60f3\u5c06\u6bcf\u4e2a\u6708\u4efd\uff081\u523012\uff09\u7684\u6570\u5b57\u8868\u793a\u4e0e\u5bf9\u5e94\u7684\u6708\u4efd\u540d\u79f0\u8fdb\u884c\u5339\u914d\u3002\u4f7f\u7528if-else if<\/code>\u7ed3\u6784\uff0c\u60a8\u9700\u8981\u8fdb\u884c\u5341\u4e8c\u4e2a\u7c7b\u4f3c\u7684\u6bd4\u8f83\u3002\u4f46\u662f\uff0c\u4f7f\u7528switch<\/code>\u8bed\u53e5\uff0c\u60a8\u53ef\u4ee5\u66f4\u7b80\u6d01\u5730\u5b8c\u6210\u8fd9\u9879\u4efb\u52a1\uff0c\u907f\u514d\u4e86\u91cd\u590d\u7684\u4ee3\u7801\u3002<\/p>\n
                    \u4e3a\u4e86\u7ec3\u4e60\u4f7f\u7528\u5e26\u6709\u6708\u4efd\u793a\u4f8b\u7684switch<\/code>\u6761\u4ef6\u8bed\u6cd5\uff0c\u8bf7\u5c06\u4ee5\u4e0b\u4ee3\u7801\u6dfb\u52a0\u5230JShell\u4e2d\u3002\u8fd9\u91cc\u6709\u4e00\u4e2a\u6574\u6570\u53d8\u91cf\u8868\u793a\u4e00\u5e74\u4e2d\u7684\u6708\u4efd\uff0c\u6bcf\u4e2a\u6708\u4efd\u90fd\u6709\u4e00\u4e2a\u5bf9\u5e94\u7684case<\/code>\uff1a<\/p>\n
                    1. int<\/span> monthOfYear =<\/span> 1<\/span>;<\/span><\/li>
                    2. switch<\/span> (<\/span>monthOfYear)<\/span><\/mark> {<\/span><\/li>
                    3. case<\/span> 1<\/span><\/mark>:<\/span><\/li>
                    4.     System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>\"\u4e00\u6708\"<\/span>)<\/span>;<\/span><\/li>
                    5.     break<\/span><\/mark>;<\/span><\/li>
                    6. case<\/span> 2<\/span><\/mark>:<\/span><\/li>
                    7.     System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>\"\u4e8c\u6708\"<\/span>)<\/span>;<\/span><\/li>
                    8.     break<\/span><\/mark>;<\/span><\/li>
                    9. default<\/span><\/mark>:<\/span><\/li>
                    10.     System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>\"\u4e0d\u662f\u4e00\u4e2a\u6708\u4efd\"<\/span>)<\/span>;<\/span><\/li>
                    11. }<\/span><\/li><\/ol><\/code><\/pre>\n
                      \u7b2c\u4e00\u884c\u4e2d\uff0c\u6709\u4e00\u4e2a\u503c\u4e3a1\u7684\u53d8\u91cfmonthOfYear<\/code>\u3002\u8fd9\u4e2a\u53d8\u91cf\u5c06\u7528\u4e8eswitch<\/code>\u8bed\u53e5\u3002\u7b2c\u4e8c\u884c\u662fswitch<\/code>\u8bed\u53e5\u7684\u5b9a\u4e49\u3002\u53d8\u91cfmonthOfYear<\/code>\u88ab\u653e\u5728\u62ec\u53f7\u5185\uff0c\u8868\u793a\u5c06\u8fdb\u884c\u6bd4\u8f83\u3002\u4e4b\u540e\u5f00\u59cb\u4e86\u4e00\u4e2a\u4ee3\u7801\u5757\uff0c\u5728\u5176\u4e2d\u63cf\u8ff0\u4e86\u4e0d\u540c\u7684case<\/code>\u6761\u4ef6\u3002<\/p>\n
                      \u5728\u7b2c3\u884c\u51fa\u73b0\u4e86\u7b2c\u4e00\u4e2a\u503c\u4e3a1\u7684\u60c5\u51b5\u3002\u7b2c\u4e00\u4e2a\u6bd4\u8f83\u5c06\u662f\u6708\u4efd\u662f\u5426\u7b49\u4e8e1\u3002\u4e00\u4e2a\u5192\u53f7\uff08:<\/code>\uff09\u603b\u662f\u8ddf\u968f\u6bd4\u8f83\u7684\u503c\u3002\u5728\u7b2c4\u884c\u51fa\u73b0\u4e86println()<\/code>\u65b9\u6cd5\uff0c\u7528\u4e8e\u6253\u5370\u51fa\u5982\u679c\u5339\u914d\u5230\u4e861\uff0c\u5e94\u8be5\u6253\u5370\u51fa\u201c\u4e00\u6708\u201d\u4f5c\u4e3a\u6708\u4efd\u7684\u540d\u79f0\u3002\u8fd9\u4e00\u884c\u53ef\u4ee5\u662f\u96f6\u4e2a\u6216\u591a\u4e2a\u8bed\u53e5\uff0c\u4e5f\u53ef\u4ee5\u662f\u96f6\u884c\u6216\u591a\u884c\u2014\u2014\u5373\u53ef\u4ee5\u8df3\u8fc7\u3002<\/p>\n
                      \u5728\u7b2c\u4e00\u4e2acase<\/code>\u4e4b\u540e\uff0c\u7b2c5\u884c\u6709\u4e00\u4e2abreak<\/code>\u8bed\u53e5\uff0c\u5b83\u5728\u6761\u4ef6\u6ee1\u8db3\u65f6\u4f7f\u5f97switch<\/code>\u6761\u4ef6\u7ed3\u6784\u88ab\u9000\u51fa\u3002\u56e0\u6b64\uff0c\u4e00\u65e6break<\/code>\u88ab\u6267\u884c\uff0c\u5c31\u4e0d\u4f1a\u518d\u8bc4\u4f30\u5176\u4ed6case<\/code>\u6761\u4ef6\u3002\u76f8\u53cd\uff0c\u7a0b\u5e8f\u6d41\u4f1a\u7ee7\u7eed\u5728switch<\/code>\u6761\u4ef6\u7684\u95ed\u62ec\u53f7\u4e4b\u540e\u7ee7\u7eed\u8fdb\u884c\uff0c\u8fd9\u5728\u672c\u4f8b\u4e2d\u662f\u5728\u7b2c11\u884c\u3002\u8bf7\u6ce8\u610f\uff0cbreak<\/code>\u662f\u53ef\u9009\u7684\uff0c\u60a8\u53ef\u80fd\u4f1a\u5fd8\u8bb0\u5305\u542b\u5b83\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cswitch<\/code>\u5c06\u7ee7\u7eed\u8bc4\u4f30\u5269\u4f59\u7684case<\/code>\uff0c\u800c\u4e0d\u662f\u5728\u5339\u914d\u65f6\u8df3\u51fa\u6761\u4ef6\u7ed3\u6784\u3002\u8fd9\u53ef\u80fd\u4f1a\u5bfc\u81f4\u610f\u5916\u7684\u8f93\u51fa\u548c\u96be\u4ee5\u8c03\u8bd5\u7684\u95ee\u9898\u3002<\/p>\n
                      \u4e0b\u4e00\u4e2acase<\/code>\u6761\u4ef6\u4f4d\u4e8e\u7b2c6\u30017\u548c8\u884c\uff0c\u5c06\u5339\u914dmonthOfYear<\/code>\u503c\u662f\u5426\u4e3a2\u3002\u8fd9\u4e09\u884c\u4e0e\u524d\u4e09\u884c\u5177\u6709\u76f8\u540c\u7684\u8bed\u6cd5\uff0c\u4f46\u5728\u7b2c7\u884c\u6709\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u201c\u4e8c\u6708\u201d\u3002\u4e3a\u4e86\u7b80\u6d01\u8d77\u89c1\uff0c\u5176\u4f59\u5341\u4e2a\u6708\u4efd\u7684case<\/code>\u6761\u4ef6\u7701\u7565\u4e86\u3002\u5426\u5219\uff0c\u5b83\u4eec\u4e5f\u4f1a\u6309\u7167\u8fd9\u4e2a\u7ed3\u6784\uff0c\u6bcf\u4e2a\u547d\u540d\u6708\u4efd\u90fd\u6709\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n
                      \u5728\u7b2c9\u884c\u662f\u4e00\u4e2adefault<\/code>\u8bed\u53e5\u3002\u5b83\u6ca1\u6709\u6761\u4ef6\uff0c\u56e0\u6b64\u603b\u662f\u5339\u914d\u7684\u3002\u5b83\u662f\u53ef\u9009\u7684\uff0c\u5e76\u4e14\u7528\u4e8e\u5728\u6ca1\u6709\u4e4b\u524d\u5217\u51fa\u7684\u60c5\u51b5\u5339\u914d\u65f6\u5b9a\u4e49\u7a0b\u5e8f\u6d41\u7684\u9ed8\u8ba4\u8def\u5f84\u3002\u5b83\u7c7b\u4f3c\u4e8eif<\/code>\u6761\u4ef6\u8bed\u53e5\u4e2d\u7684else<\/code>\u8bed\u53e5\u3002<\/p>\n
                      \u5728\u7b2c11\u884c\uff0c\u6709\u4e00\u4e2a\u95ed\u62ec\u53f7\u7528\u4e8e\u7ec8\u6b62\u6761\u4ef6\u8bed\u53e5\u7684\u4ee3\u7801\u5757\u3002<\/p>\n
                      \u8981\u6267\u884c\u4e0a\u8ff0\u4ee3\u7801\uff0c\u8bf7\u5c06\u5176\u7c98\u8d34\u5230JShell\u4e2d\u3002\u60a8\u5c06\u6536\u5230\u4ee5\u4e0b\u8f93\u51fa\uff1a<\/p>\n
                      \u8f93\u51fa<\/div>monthOfYear ==> 1\r\n\u4e00\u6708\r\n<\/code><\/pre>\n
                      \u7b2c\u4e00\u884c\u786e\u8ba4\u4e86monthOfYear<\/code>\u7684\u503c\u662f1\u3002\u7b2c\u4e8c\u884c\u6253\u5370\u51fa\u4e86\u201c\u4e00\u6708\u201d\uff0c\u8fd9\u610f\u5473\u7740\u503c\u4e3a1\u7684\u6761\u4ef6\u5df2\u7ecf\u5339\u914d\uff1amonthOfYear<\/code>\u662f1\uff0c\u89e6\u53d1\u4e86\u4e0b\u4e00\u884c\u7684\u8bed\u53e5\u53bb\u6253\u5370\u201c\u4e00\u6708\u201d\u3002<\/p>\n
                      \u4f5c\u4e3a\u4e00\u9879\u7ec3\u4e60\uff0c\u5c1d\u8bd5\u6539\u53d8monthOfYear<\/code>\u7684\u503c\uff0c\u589e\u52a0\u66f4\u591a\u7684\u6761\u4ef6\u8bed\u53e5\uff0c\u751a\u81f3\u5220\u9664break<\/code>\u8bed\u53e5\uff0c\u4ee5\u7406\u89e3\u7ed3\u679c\u5c06\u5982\u4f55\u6539\u53d8\u3002<\/p>\n
                      \u7ed3\u8bba<\/h2>\n
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