{"id":202696,"date":"2025-05-22T11:35:51","date_gmt":"2025-05-22T03:35:51","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202696\/"},"modified":"2025-05-22T11:35:51","modified_gmt":"2025-05-22T03:35:51","slug":"%e7%90%86%e8%a7%a3-java-%e4%b8%ad%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b%e7%9a%84%e9%ab%98%e9%98%b6%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202696\/","title":{"rendered":"\u7406\u89e3 Java \u4e2d\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u9ad8\u9636\u51fd\u6570"},"content":{"rendered":"

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

\u7406\u89e3 Java \u4e2d\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u9ad8\u9636\u51fd\u6570<\/h1>\n

\u5b66\u4e60\u6587\u7ae0<\/span>\u8981\u52aa\u529b\uff0c\u4f46\u662f\u4e0d\u8981\u6025\uff01\u4eca\u5929\u7684\u8fd9\u7bc7\u6587\u7ae0\u300a\u7406\u89e3 Java \u4e2d\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u9ad8\u9636\u51fd\u6570\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

\u9ad8\u9636\u51fd\u6570\u662f Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u53ef\u4ee5\u63a5\u6536\u6216\u8fd4\u56de\u51fd\u6570\u7684\u51fd\u6570\uff0c\u5b83\u4eec\u4f7f\u4ee3\u7801\u66f4\u7b80\u6d01\u3001\u53ef\u8bfb\u548c\u53ef\u7ef4\u62a4\uff0c\u5e76\u53ef\u7528\u4e8e\u5404\u79cd\u573a\u666f\uff0c\u4f8b\u5982\u6392\u5e8f\u3001\u6d41\u5904\u7406\u3001\u7b5b\u9009\u548c\u8f6c\u6362\u3002<\/p>\n

<\/p>\n

\u9ad8\u9636\u51fd\u6570\uff1a\u9a7e\u9a6d Java \u4e2d\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u5229\u5668<\/strong><\/p>\n

\u5728 Java \u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\uff0c\u9ad8\u9636\u51fd\u6570\u626e\u6f14\u7740\u81f3\u5173\u91cd\u8981\u7684\u89d2\u8272\uff0c\u5b83\u5141\u8bb8\u6211\u4eec\u5c06\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u5176\u4ed6\u51fd\u6570\u6216\u5c06\u51fd\u6570\u4f5c\u4e3a\u8fd4\u56de\u503c\u3002\u8fd9\u79cd\u80fd\u529b\u89e3\u9501\u4e86\u4e00\u7cfb\u5217\u5f3a\u5927\u7684\u7279\u6027\uff0c\u4f7f\u6211\u4eec\u80fd\u591f\u7f16\u5199\u66f4\u7b80\u6d01\u3001\u66f4\u53ef\u8bfb\u4e14\u66f4\u53ef\u7ef4\u62a4\u7684\u4ee3\u7801\u3002<\/p>\n

\u4ec0\u4e48\u662f\u9ad8\u9636\u51fd\u6570\uff1f<\/strong><\/p>\n

\u9ad8\u9636\u51fd\u6570\u662f\u4e00\u79cd\u53ef\u4ee5\u63a5\u6536\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u6216\u8fd4\u56de\u51fd\u6570\u7684\u51fd\u6570\u3002\u5728 Java \u4e2d\uff0c\u9ad8\u9636\u51fd\u6570\u53ef\u4ee5\u4f7f\u7528 Function<T, R> \u63a5\u53e3\u6765\u58f0\u660e\uff0c\u5176\u4e2d T \u662f\u8f93\u5165\u7c7b\u578b\uff0cR \u662f\u8f93\u51fa\u7c7b\u578b\u3002<\/p>\n

\u5b9e\u6218\u6848\u4f8b\uff1a\u4f7f\u7528\u9ad8\u9636\u51fd\u6570\u6392\u5e8f\u5217\u8868<\/strong><\/p>\n

\u8003\u8651\u4ee5\u4e0b\u573a\u666f\uff1a\u6211\u4eec\u6709\u4e00\u4e2a\u5b66\u751f\u5217\u8868\uff0c\u9700\u8981\u6309\u540d\u79f0\u5bf9\u5217\u8868\u8fdb\u884c\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 Collections.sort() \u65b9\u6cd5\u5b9e\u73b0\u6b64\u529f\u80fd\uff0c\u4f46\u5b83\u8981\u6c42\u6211\u4eec\u5b9e\u73b0\u4e00\u4e2a\u6bd4\u8f83\u5668\u63a5\u53e3\u6765\u6307\u5b9a\u6392\u5e8f\u987a\u5e8f\u3002<\/p>\n

\u4f20\u7edf\u65b9\u6cd5\uff1a<\/strong><\/p>\n

List<Student> students = ...;\n\nCollections.sort(students, new Comparator<Student>() {\n    @Override\n    public int compare(Student s1, Student s2) {\n        return s1.getName().compareTo(s2.getName());\n    }\n});<\/pre>\n
\u9ad8\u9636\u51fd\u6570\u65b9\u6cd5\uff1a<\/strong><\/p>\n
List<Student> students = ...;\n\nstudents.sort(Comparator.comparing(Student::getName));<\/pre>\n
\u5728\u9ad8\u9636\u51fd\u6570\u65b9\u6cd5\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528 Comparator.comparing() \u6765\u521b\u5efa\u4e86\u4e00\u4e2a\u6bd4\u8f83\u5668\uff0c\u5b83\u63a5\u53d7\u4e00\u4e2a lambda \u8868\u8fbe\u5f0f\u4f5c\u4e3a\u53c2\u6570\uff0c\u8be5\u8868\u8fbe\u5f0f\u6307\u5b9a\u6392\u5e8f\u987a\u5e8f\u3002\u4f20\u9012\u7ed9 sort() \u65b9\u6cd5\u540e\uff0c\u5b83\u5c06\u4f7f\u7528\u8be5\u6bd4\u8f83\u5668\u6839\u636e\u540d\u79f0\u5bf9\u5b66\u751f\u8fdb\u884c\u6392\u5e8f\u3002<\/p>\n
\u9ad8\u9636\u51fd\u6570\u7684\u4f18\u52bf<\/strong><\/p>\n
    \n
  • \u4ee3\u7801\u7b80\u6d01\u6027\uff1a<\/strong>\u9ad8\u9636\u51fd\u6570\u5141\u8bb8\u6211\u4eec\u4f7f\u7528\u66f4\u7b80\u6d01\u7684\u8bed\u6cd5\u7f16\u5199\u590d\u6742\u7684\u529f\u80fd\u3002<\/li>\n
  • \u53ef\u8bfb\u6027\uff1a<\/strong>\u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u53ef\u4ee5\u66f4\u76f4\u89c2\u5730\u8868\u8fbe\u6392\u5e8f\u89c4\u5219\uff0c\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u3002<\/li>\n
  • \u53ef\u7ef4\u62a4\u6027\uff1a<\/strong>\u901a\u8fc7\u5c06\u6bd4\u8f83\u903b\u8f91\u5c01\u88c5\u5728 lambda \u8868\u8fbe\u5f0f\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u8f7b\u677e\u5730\u4fee\u6539\u6392\u5e8f\u987a\u5e8f\uff0c\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027\u3002<\/li>\n<\/ul>\n
    \u9664\u4e86\u6392\u5e8f\u5916\uff0c\u9ad8\u9636\u51fd\u6570\u8fd8\u6709\u5e7f\u6cdb\u7684\u5e94\u7528\uff0c\u4f8b\u5982\u6d41\u5904\u7406\u3001\u7b5b\u9009\u548c\u8f6c\u6362\u3002\u5145\u5206\u5229\u7528\u9ad8\u9636\u51fd\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8 Java \u4e2d\u51fd\u6570\u5f0f\u7f16\u7a0b\u4ee3\u7801\u7684\u529f\u6548\u548c\u7075\u6d3b\u6027\u3002<\/p>\n
    \u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\uff01\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u7406\u89e3 Java \u4e2d\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u9ad8...<\/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-202696","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202696","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=202696"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202696\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202696"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202696"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202696"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}