{"id":203159,"date":"2025-05-22T11:01:40","date_gmt":"2025-05-22T03:01:40","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203159\/"},"modified":"2025-05-22T11:01:40","modified_gmt":"2025-05-22T03:01:40","slug":"java-%e6%a8%a1%e5%bc%8f%e5%8c%b9%e9%85%8d%e9%9d%a2%e8%af%95%e9%a2%98","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203159\/","title":{"rendered":"Java \u6a21\u5f0f\u5339\u914d\u9762\u8bd5\u9898"},"content":{"rendered":"

<\/b> <\/p>\n

Java \u6a21\u5f0f\u5339\u914d\u9762\u8bd5\u9898<\/h1>\n

<\/i>\u6536\u85cf<\/span> <\/p>\n

\u5b66\u4e60\u6587\u7ae0<\/span>\u8981\u52aa\u529b\uff0c\u4f46\u662f\u4e0d\u8981\u6025\uff01\u4eca\u5929\u7684\u8fd9\u7bc7\u6587\u7ae0\u300aJava \u6a21\u5f0f\u5339\u914d\u9762\u8bd5\u9898\u300b<\/span>\u5c06\u4f1a\u4ecb\u7ecd\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u60f3\u6df1\u5165\u5b66\u4e60\u6587\u7ae0<\/span>\uff0c\u53ef\u4ee5\u5173\u6ce8\u6211\uff01\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u6587\u7ae0\u7684\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u80fd\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n

<\/p>\n

Q1\u3002 Java \u4e2d\u7684\u6a21\u5f0f\u5339\u914d\u662f\u4ec0\u4e48\uff1f<\/strong>
A1\u3002\u6a21\u5f0f\u5339\u914d\u662f Java 16 \u4e2d\u5f15\u5165\u7684\u4e00\u9879\u529f\u80fd\uff0c\u5141\u8bb8\u5f00\u53d1\u4eba\u5458\u4ee5\u7b80\u6d01\u4e14\u7c7b\u578b\u5b89\u5168\u7684\u65b9\u5f0f\u8868\u8fbe\u66f4\u590d\u6742\u7684\u903b\u8f91\u6761\u4ef6\u3002\u5b83\u6d89\u53ca\u5c06\u503c\u4e0e\u6a21\u5f0f\u8fdb\u884c\u6bd4\u8f83\uff0c\u5e76\u5728\u6a21\u5f0f\u5339\u914d\u65f6\u5c06\u8be5\u503c\u7ed1\u5b9a\u5230\u53d8\u91cf\u3002<\/p>\n

\u7b2c\u4e8c\u5b63\u5ea6\u3002\u6a21\u5f0f\u5339\u914d\u4e0e Java \u4e2d\u4f20\u7edf\u7684 switch \u8bed\u53e5\u6709\u4f55\u4e0d\u540c\uff1f<\/strong>
A2\u3002\u6a21\u5f0f\u5339\u914d\u5141\u8bb8\u4f7f\u7528\u66f4\u590d\u6742\u7684\u6761\u4ef6\u548c\u6a21\u5f0f\u8fdb\u884c\u6bd4\u8f83\uff0c\u800c switch \u8bed\u53e5\u4ec5\u9650\u4e8e\u4e0e\u7279\u5b9a\u503c\u8fdb\u884c\u6bd4\u8f83\u3002\u6a21\u5f0f\u5339\u914d\u8fd8\u652f\u6301\u53d8\u91cf\u7ed1\u5b9a\uff0c\u800c switch \u8bed\u53e5\u5219\u4e0d\u652f\u6301\u3002<\/p>\n

\u7b2c\u4e09\u5b63\u5ea6\u3002\u5728 Java \u4e2d\u4f7f\u7528\u6a21\u5f0f\u5339\u914d\u6709\u4ec0\u4e48\u597d\u5904\uff1f<\/strong>
A3\u3002\u6a21\u5f0f\u5339\u914d\u6709\u52a9\u4e8e\u51cf\u5c11\u4ee3\u7801\u91cd\u590d\uff0c\u63d0\u9ad8\u4ee3\u7801\u53ef\u8bfb\u6027\uff0c\u5e76\u66f4\u5bb9\u6613\u5904\u7406\u590d\u6742\u7684\u6761\u4ef6\u903b\u8f91\u3002\u5b83\u8fd8\u53ef\u4ee5\u901a\u8fc7\u51cf\u5c11\u5d4c\u5957 if-else \u8bed\u53e5\u7684\u9700\u8981\u6765\u5b9e\u73b0\u66f4\u9ad8\u6548\u7684\u7f16\u7801\u3002<\/p>\n

\u7b2c\u56db\u5b63\u5ea6\u3002\u4f60\u80fd\u89e3\u91ca\u4e00\u4e0b Java \u4e2d\u7684\u6a21\u5f0f\u5339\u914d\u662f\u5982\u4f55\u5de5\u4f5c\u7684\u5417\uff1f<\/strong>
A4\u3002\u6a21\u5f0f\u5339\u914d\u9996\u5148\u8bc6\u522b\u6b63\u5728\u6bd4\u8f83\u7684\u503c\u7684\u7c7b\u578b\uff0c\u7136\u540e\u68c0\u67e5\u5b83\u662f\u5426\u4e0e\u4efb\u4f55\u6307\u5b9a\u7684\u6a21\u5f0f\u5339\u914d\u3002\u5982\u679c\u627e\u5230\u5339\u914d\uff0c\u5219\u5c06\u8be5\u503c\u7ed1\u5b9a\u5230\u53d8\u91cf\u5e76\u6267\u884c\u76f8\u5e94\u7684\u4ee3\u7801\u5757\u3002\u5982\u679c\u672a\u627e\u5230\u5339\u914d\u9879\uff0c\u5219\u4f1a\u5f15\u53d1\u5f02\u5e38\u3002<\/p>\n

Q5\u3002 Java \u6a21\u5f0f\u5339\u914d\u652f\u6301\u54ea\u4e9b\u4e0d\u540c\u7c7b\u578b\u7684\u6a21\u5f0f\uff1f<\/strong>
A5\u3002 Java\u6a21\u5f0f\u5339\u914d\u652f\u6301\u5e38\u91cf\u6a21\u5f0f\u3001\u7c7b\u578b\u6a21\u5f0f\u3001\u89e3\u6784\u6a21\u5f0f\u548c\u53d8\u91cf\u6a21\u5f0f\u3002<\/p>\n

Q6\u3002\u5982\u4f55\u5728 Java \u6a21\u5f0f\u5339\u914d\u4e2d\u4f7f\u7528\u89e3\u6784\u6a21\u5f0f\uff1f<\/strong>
A6\u3002\u89e3\u6784\u6a21\u5f0f\u901a\u8fc7\u5c06\u5bf9\u8c61\u5206\u89e3\u4e3a\u5176\u7ec4\u6210\u90e8\u5206\u6765\u5141\u8bb8\u66f4\u590d\u6742\u7684\u5339\u914d\u3002\u8fd9\u662f\u4f7f\u7528 deconstruct() \u65b9\u6cd5\u5b8c\u6210\u7684\uff0c\u8be5\u65b9\u6cd5\u53ef\u4ee5\u5728\u81ea\u5b9a\u4e49\u5bf9\u8c61\u4e0a\u5b9e\u73b0\u3002<\/p>\n

Q7\u3002\u4f60\u80fd\u5728 Java \u4e2d\u5bf9\u96c6\u5408\u6216\u6570\u7ec4\u4f7f\u7528\u6a21\u5f0f\u5339\u914d\u5417\uff1f<\/strong>
A7\u3002\u662f\u7684\uff0c\u6a21\u5f0f\u5339\u914d\u53ef\u4ee5\u4e0e Java \u4e2d\u7684\u96c6\u5408\u548c\u6570\u7ec4\u4e00\u8d77\u4f7f\u7528\uff0c\u901a\u8fc7\u4f7f\u7528 instanceof \u8fd0\u7b97\u7b26\u6765\u68c0\u67e5\u6bd4\u8f83\u7684\u503c\u662f\u5426\u5c5e\u4e8e\u6b63\u786e\u7684\u7c7b\u578b\u3002<\/p>\n

Q8\u3002\u5728 Java \u4e2d\u4f7f\u7528\u6a21\u5f0f\u5339\u914d\u6709\u4ec0\u4e48\u9650\u5236\u5417\uff1f<\/strong>
A8\u3002\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u6a21\u5f0f\u5339\u914d\u5e76\u4e0d\u80fd\u66ff\u4ee3 switch \u8bed\u53e5\uff0c\u5e76\u4e14\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b switch \u8bed\u53e5\u53ef\u80fd\u4ecd\u7136\u662f\u66f4\u597d\u7684\u9009\u62e9\u3002\u6b64\u5916\uff0c\u6a21\u5f0f\u5339\u914d\u4ec5\u5728 Java 16 \u53ca\u66f4\u9ad8\u7248\u672c\u4e2d\u53ef\u7528\u3002<\/p>\n

Q9\u3002\u5982\u4f55\u5904\u7406 Java \u6a21\u5f0f\u5339\u914d\u4e2d\u591a\u4e2a\u6a21\u5f0f\u53ef\u80fd\u5339\u914d\u7684\u60c5\u51b5\uff1f<\/strong>
A9\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5c06\u4f7f\u7528\u7b2c\u4e00\u4e2a\u5339\u914d\u7684\u6a21\u5f0f\uff0c\u5e76\u5ffd\u7565\u4efb\u4f55\u540e\u7eed\u6a21\u5f0f\u3002\u8fd9\u53ef\u4ee5\u4f7f\u7528\u5173\u952e\u5b57\u201cor\u201d\u6765\u63a7\u5236\uff0c\u4ee5\u6307\u793a\u591a\u4e2a\u6a21\u5f0f\u53ef\u4ee5\u5339\u914d\u3002<\/p>\n

Q10\u3002\u60a8\u80fd\u5426\u63d0\u4f9b\u4e00\u4e2a\u5728\u73b0\u5b9e\u573a\u666f\u4e2d\u4f7f\u7528 Java \u6a21\u5f0f\u5339\u914d\u7684\u793a\u4f8b\uff1f<\/strong>
A10\u3002\u5f53\u7136\uff0c\u4f8b\u5982\uff0c\u6a21\u5f0f\u5339\u914d\u53ef\u4ee5\u7528\u6765\u4ee5\u66f4\u7b80\u6d01\u7684\u65b9\u5f0f\u5904\u7406\u4e0d\u540c\u7c7b\u578b\u7684\u5f02\u5e38\u3002\u53ef\u4ee5\u4f7f\u7528\u5355\u4e2a\u6a21\u5f0f\u5339\u914d\u8bed\u53e5\u6765\u5904\u7406\u4e0d\u540c\u7c7b\u578b\u7684\u5f02\u5e38\u5e76\u6267\u884c\u5fc5\u8981\u7684\u64cd\u4f5c\uff0c\u800c\u4e0d\u662f\u4f7f\u7528\u591a\u4e2a if-else \u5757\u3002<\/p>\n

Java 21 \u9762\u8bd5\u9898<\/p>\n

\u4eca\u5929\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff1b\u5173\u4e8e\u6587\u7ae0\u7684\u6280\u672f\u77e5\u8bc6\u6211\u4eec\u4f1a\u4e00\u70b9\u70b9\u6df1\u5165\u4ecb\u7ecd\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u4e00\u8d77\u5b66\u4e60\u7f16\u7a0b~<\/p>\n

\u7248\u672c\u58f0\u660e \u672c\u6587\u8f6c\u8f7d\u4e8e\uff1adev.to \u5982\u6709\u4fb5\u72af\uff0c\u8bf7\u8054\u7cfb\u5220\u9664<\/p>\n","protected":false},"excerpt":{"rendered":"

Java \u6a21\u5f0f\u5339\u914d\u9762\u8bd5\u9898 \u6536\u85cf ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-203159","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203159","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=203159"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203159\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203159"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203159"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203159"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}