{"id":202979,"date":"2025-05-22T10:32:44","date_gmt":"2025-05-22T02:32:44","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202979\/"},"modified":"2025-05-22T10:32:44","modified_gmt":"2025-05-22T02:32:44","slug":"java%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b%ef%bc%9a%e6%8f%90%e5%8d%87%e6%95%b0%e6%8d%ae%e5%a4%84%e7%90%86%e6%95%88%e7%8e%87%e7%9a%84%e5%88%a9%e5%99%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202979\/","title":{"rendered":"Java\u51fd\u6570\u5f0f\u7f16\u7a0b\uff1a\u63d0\u5347\u6570\u636e\u5904\u7406\u6548\u7387\u7684\u5229\u5668"},"content":{"rendered":"

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

Java\u51fd\u6570\u5f0f\u7f16\u7a0b\uff1a\u63d0\u5347\u6570\u636e\u5904\u7406\u6548\u7387\u7684\u5229\u5668<\/h1>\n

\u672c\u7bc7\u6587\u7ae0\u5411\u5927\u5bb6\u4ecb\u7ecd\u300aJava\u51fd\u6570\u5f0f\u7f16\u7a0b\uff1a\u63d0\u5347\u6570\u636e\u5904\u7406\u6548\u7387\u7684\u5229\u5668\u300b\uff0c\u4e3b\u8981\u5305\u62ec\uff0c\u5177\u6709\u4e00\u5b9a\u7684\u53c2\u8003\u4ef7\u503c\uff0c\u9700\u8981\u7684\u670b\u53cb\u53ef\u4ee5\u53c2\u8003\u4e00\u4e0b\u3002<\/p>\n

\u51fd\u6570\u5f0f\u7f16\u7a0b\uff0c\u91c7\u7528\u4e0d\u53ef\u53d8\u503c\u548c\u7eaf\u51fd\u6570\u7684\u7f16\u7a0b\u8303\u5f0f\uff0c\u5728 Java \u4e2d\u80fd\u63d0\u5347\u6570\u636e\u5904\u7406\u6548\u7387\u3002\u5b83\u5177\u6709\u4ee5\u4e0b\u4f18\u52bf\uff1a\u4e0d\u53ef\u53d8\u6027\uff1a\u6570\u636e\u4ee5\u4e0d\u53ef\u53d8\u5bf9\u8c61\u8868\u793a\uff0c\u786e\u4fdd\u7ebf\u7a0b\u5b89\u5168\uff0c\u7b80\u5316\u5e76\u53d1\u5904\u7406\u548c\u9632\u6b62\u610f\u5916\u4fee\u6539\u3002\u7eaf\u51fd\u6570\uff1a\u4e0d\u4f1a\u4ea7\u751f\u526f\u4f5c\u7528\uff0c\u59cb\u7ec8\u8fd4\u56de\u76f8\u540c\u8f93\u51fa\uff0c\u7b80\u5316\u6d4b\u8bd5\u548c\u8c03\u8bd5\u3002\u6d41\u5904\u7406\uff1a\u60f0\u6027\u6570\u636e\u7ed3\u6784\uff0c\u5ef6\u8fdf\u5904\u7406\uff0c\u9ad8\u6548\u5904\u7406\u5927\u578b\u6570\u636e\u96c6\u3002Lambda \u8868\u8fbe\u5f0f\uff1a\u5185\u8054\u5b9a\u4e49\u51fd\u6570\uff0c\u7b80\u5316\u51fd\u6570\u5f0f\u7f16\u7a0b\u8bed\u6cd5\u3002<\/p>\n

<\/p>\n

Java \u51fd\u6570\u5f0f\u7f16\u7a0b\uff1a\u63d0\u5347\u6570\u636e\u5904\u7406\u6548\u7387\u7684\u5229\u5668<\/strong><\/p>\n

\u51fd\u6570\u5f0f\u7f16\u7a0b\uff0c\u4e00\u79cd\u7f16\u7a0b\u8303\u5f0f\uff0c\u5b83\u5c06\u4ee3\u7801\u7ec4\u7ec7\u6210\u4e0d\u53ef\u53d8\u503c\u548c\u7eaf\u51fd\u6570\u4e2d\uff0c\u5728 Java \u5e94\u7528\u7a0b\u5e8f\u4e2d\u8d8a\u6765\u8d8a\u6d41\u884c\u3002\u5b83\u63d0\u4f9b\u4e86\u589e\u5f3a\u6570\u636e\u5904\u7406\u6548\u7387\u548c\u7b80\u5316\u4ee3\u7801\u903b\u8f91\u7684\u72ec\u7279\u4f18\u52bf\u3002<\/p>\n

\u4e0d\u53ef\u53d8\u6027<\/strong><\/p>\n

\u5728\u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\uff0c\u6570\u636e\u4ee5\u4e0d\u53ef\u53d8\u5bf9\u8c61\u8868\u793a\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u4eec\u4e00\u65e6\u521b\u5efa\u5c31\u4e0d\u80fd\u4fee\u6539\u3002\u8fd9\u79cd\u65b9\u6cd5\u786e\u4fdd\u4e86\u7ebf\u7a0b\u5b89\u5168\uff0c\u7b80\u5316\u4e86\u5e76\u53d1\u5904\u7406\uff0c\u5e76\u9632\u6b62\u610f\u5916\u6570\u636e\u4fee\u6539\u5f15\u8d77\u7684\u9519\u8bef\u3002<\/p>\n

\u793a\u4f8b\uff1a<\/strong><\/p>\n

\/\/ \u53ef\u53d8 List\nList<String> mutableList = new ArrayList<>();\n\n\/\/ \u4e0d\u53ef\u53d8 List\nImmutableList<String> immutableList = ImmutableList.of(\"Java\", \"Python\", \"C++\");<\/pre>\n
\u7eaf\u51fd\u6570<\/strong><\/p>\n
\u7eaf\u51fd\u6570\u662f\u4e0d\u4f1a\u4ea7\u751f\u526f\u4f5c\u7528\uff08\u4f8b\u5982\u4fee\u6539\u5916\u90e8\u72b6\u6001\uff09\u5e76\u4e14\u59cb\u7ec8\u8fd4\u56de\u76f8\u540c\u8f93\u51fa\u7ed9\u5b9a\u76f8\u540c\u8f93\u5165\u7684\u51fd\u6570\u3002\u7eaf\u51fd\u6570\u7b80\u5316\u4e86\u6d4b\u8bd5\u548c\u8c03\u8bd5\uff0c\u56e0\u4e3a\u5b83\u4eec\u7684\u53ef\u9884\u6d4b\u6027\u3002<\/p>\n
\u793a\u4f8b\uff1a<\/strong><\/p>\n
\/\/ \u975e\u7eaf\u51fd\u6570\uff08\u4fee\u6539\u5916\u90e8\u53d8\u91cf\uff09\nint globalCounter = 0;\nint incrementGlobal() { return ++globalCounter; }\n\n\/\/ \u7eaf\u51fd\u6570\nint add(int a, int b) { return a + b; }<\/pre>\n
\u6d41\u5904\u7406<\/strong><\/p>\n
Java \u4e2d\u7684\u6d41 API \u5141\u8bb8\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u98ce\u683c\u5bf9\u5143\u7d20\u5e8f\u5217\u8fdb\u884c\u9ad8\u7ea7\u64cd\u4f5c\u3002\u6d41\u662f\u4e00\u79cd\u60f0\u6027\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u5ef6\u8fdf\u5904\u7406\u76f4\u5230\u5b9e\u9645\u9700\u8981\u65f6\u3002\u8fd9\u63d0\u4f9b\u4e86\u9ad8\u6548\u7684\u6570\u636e\u5904\u7406\uff0c\u5c24\u5176\u662f\u5f53\u5904\u7406\u5927\u578b\u6570\u636e\u96c6\u65f6\u3002<\/p>\n
\u793a\u4f8b\uff1a<\/strong><\/p>\n
\/\/ \u8fc7\u6ee4\u51fa\u6d41\u4e2d\u975e\u7a7a\u7684\u5b57\u7b26\u4e32\nList<String> nonEmptyStrings = stream.filter(s -> s.length() > 0).toList();\n\n\/\/ \u6620\u5c04\u6d41\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\nList<Integer> lengths = stream.map(s -> s.length()).toList();<\/pre>\n
Lambda \u8868\u8fbe\u5f0f<\/strong><\/p>\n
Lambda \u8868\u8fbe\u5f0f\u662f\u533f\u540d\u51fd\u6570\u7684\u8f7b\u91cf\u7ea7\u8bed\u6cd5\u3002\u5b83\u4eec\u5141\u8bb8\u5728\u4ee3\u7801\u4e2d\u5185\u8054\u5b9a\u4e49\u51fd\u6570\uff0c\u4ece\u800c\u7b80\u5316\u4e86\u51fd\u6570\u5f0f\u7f16\u7a0b\u8bed\u6cd5\u3002<\/p>\n
\u793a\u4f8b\uff1a<\/strong><\/p>\n
\/\/ \u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u521b\u5efa\u533f\u540d\u51fd\u6570\nComparator<String> comparator = (a, b) -> a.compareTo(b);\n\n\/\/ \u5c06 lambda \u8868\u8fbe\u5f0f\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\nList<String> sortedList = stream.sorted(comparator);<\/pre>\n
\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
\u5229\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\uff0c\u6211\u4eec\u53ef\u4ee5\u663e\u8457\u63d0\u5347\u4ee5\u4e0b\u573a\u666f\u7684\u6570\u636e\u5904\u7406\u6548\u7387\uff1a<\/p>\n
    \n
  • \u6570\u636e\u6e05\u6d17\uff1a<\/strong>\u4f7f\u7528\u4e0d\u53ef\u53d8\u96c6\u5408\u548c\u6d41 API \u53ef\u4ee5\u6709\u6548\u5730\u5220\u9664\u3001\u4fee\u6539\u548c\u7b5b\u9009\u6570\u636e\u3002<\/li>\n
  • \u6570\u636e\u805a\u5408\uff1a<\/strong>\u805a\u5408\u51fd\u6570\u5141\u8bb8\u9ad8\u6548\u5730\u5bf9\u6570\u636e\u96c6\u8fdb\u884c\u6c42\u548c\u3001\u5e73\u5747\u3001\u6700\u5927\u503c\u548c\u6700\u5c0f\u503c\u7b49\u64cd\u4f5c\u3002<\/li>\n
  • \u6570\u636e\u5206\u6790\uff1a<\/strong>\u6620\u5c04\u548c\u8fc7\u6ee4\u51fd\u6570\u53ef\u4ee5\u7528\u4e8e\u521b\u5efa\u81ea\u5b9a\u4e49\u6570\u636e\u8f6c\u6362\u548c\u5206\u6790\u7ba1\u9053\u3002<\/li>\n<\/ul>\n
    \u7ed3\u8bba<\/strong><\/p>\n
    Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u63d0\u4f9b\u4e86\u4e00\u5957\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u7528\u4e8e\u63d0\u5347\u6570\u636e\u5904\u7406\u7684\u6548\u7387\u548c\u7b80\u5316\u4ee3\u7801\u903b\u8f91\u3002\u901a\u8fc7\u4f7f\u7528\u4e0d\u53ef\u53d8\u503c\u3001\u7eaf\u51fd\u6570\u3001\u6d41\u5904\u7406\u548c lambda \u8868\u8fbe\u5f0f\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u521b\u5efa\u66f4\u5065\u58ee\u3001\u66f4\u6613\u4e8e\u7ef4\u62a4\u548c\u66f4\u5177\u8868\u8fbe\u529b\u7684\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n
    \u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300aJava\u51fd\u6570\u5f0f\u7f16\u7a0b\uff1a\u63d0\u5347\u6570\u636e\u5904\u7406\u6548\u7387\u7684\u5229\u5668\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591a\u6587\u7ae0\u77e5\u8bc6\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    Java\u51fd\u6570\u5f0f\u7f16\u7a0b\uff1a\u63d0\u5347\u6570\u636e\u5904\u7406...<\/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-202979","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202979","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=202979"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202979\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202979"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202979"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202979"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}