{"id":202758,"date":"2025-05-22T10:50:55","date_gmt":"2025-05-22T02:50:55","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202758\/"},"modified":"2025-05-22T10:50:55","modified_gmt":"2025-05-22T02:50:55","slug":"java%e5%87%bd%e6%95%b0%e4%b8%8e%e5%8c%bf%e5%90%8d%e5%86%85%e9%83%a8%e7%b1%bb%e7%9a%84%e6%af%94%e8%be%83","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202758\/","title":{"rendered":"Java\u51fd\u6570\u4e0e\u533f\u540d\u5185\u90e8\u7c7b\u7684\u6bd4\u8f83"},"content":{"rendered":"

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

Java\u51fd\u6570\u4e0e\u533f\u540d\u5185\u90e8\u7c7b\u7684\u6bd4\u8f83<\/h1>\n

\u5c0f\u4f19\u4f34\u4eec\u5bf9\u6587\u7ae0\u7f16\u7a0b\u611f\u5174\u8da3\u5417\uff1f\u662f\u5426\u6b63\u5728\u5b66\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff1f\u5982\u679c\u662f\uff0c\u90a3\u4e48\u672c\u6587\u300aJava\u51fd\u6570\u4e0e\u533f\u540d\u5185\u90e8\u7c7b\u7684\u6bd4\u8f83\u300b\uff0c\u5c31\u5f88\u9002\u5408\u4f60\uff0c\u672c\u7bc7\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec\u3002\u5728\u4e4b\u540e\u7684\u6587\u7ae0\u4e2d\u4e5f\u4f1a\u591a\u591a\u5206\u4eab\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n

\u5728 Java \u4e2d\uff0clambda \u8868\u8fbe\u5f0f\u548c\u533f\u540d\u5185\u90e8\u7c7b\u90fd\u662f\u5b9e\u73b0\u4ee3\u7801\u5757\u7684\u65b9\u6cd5\u3002\u7b80\u6d01\u6027\uff1alambda \u8868\u8fbe\u5f0f\u66f4\u7b80\u6d01\uff0c\u53ea\u9700\u4e00\u884c\u4ee3\u7801\u5373\u53ef\u5b9a\u4e49\u3002\u591a\u6001\u6027\uff1a\u533f\u540d\u5185\u90e8\u7c7b\u5141\u8bb8\u591a\u6001\u6027\uff0c\u53ef\u4ee5\u7ee7\u627f\u6216\u5b9e\u73b0\u7c7b\u6216\u63a5\u53e3\u3002\u5916\u90e8\u53d8\u91cf\u8bbf\u95ee\u6743\u9650\uff1alambda \u8868\u8fbe\u5f0f\u53ef\u4ee5\u8bbf\u95ee\u6240\u6709\u5916\u90e8\u53d8\u91cf\uff0c\u800c\u533f\u540d\u5185\u90e8\u7c7b\u53ea\u80fd\u8bbf\u95ee\u58f0\u660e\u4e3a final \u7684\u53d8\u91cf\u3002\u5185\u5b58\u5360\u7528\uff1alambda \u8868\u8fbe\u5f0f\u66f4\u8282\u7701\u5185\u5b58\u3002\u9002\u7528\u573a\u666f\uff1alambda \u8868\u8fbe\u5f0f\u9002\u7528\u4e8e\u7b80\u5355\u7684\u51fd\u6570\u5f0f\u64cd\u4f5c\uff0c\u800c\u533f\u540d\u5185\u90e8\u7c7b\u9002\u7528\u4e8e\u590d\u6742\u3001\u53ef\u91cd\u7528\u7684\u64cd\u4f5c\u3002<\/p>\n

<\/p>\n

Java \u51fd\u6570\u4e0e\u533f\u540d\u5185\u90e8\u7c7b\u7684\u6bd4\u8f83<\/strong><\/p>\n

\u7b80\u4ecb<\/strong><\/p>\n

Java \u4e2d\u7684\u51fd\u6570\uff08lambda \u8868\u8fbe\u5f0f\uff09\u548c\u533f\u540d\u5185\u90e8\u7c7b\u90fd\u662f\u5b9e\u73b0\u4ee3\u7801\u5757\u7684\u65b9\u6cd5\u3002\u867d\u7136\u5b83\u4eec\u6709\u76f8\u4f3c\u4e4b\u5904\uff0c\u4f46\u4e5f\u6709\u660e\u663e\u7684\u533a\u522b\u3002\u672c\u6587\u5c06\u63a2\u8ba8\u8fd9\u4e24\u79cd\u65b9\u6cd5\uff0c\u5e76\u901a\u8fc7\u5b9e\u6218\u6848\u4f8b\u6bd4\u8f83\u5b83\u4eec\u7684\u4f18\u7f3a\u70b9\u3002<\/p>\n

lambda \u8868\u8fbe\u5f0f<\/strong><\/p>\n

lambda \u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u7b80\u6d01\u800c\u5f3a\u5927\u7684\u65b9\u6cd5\uff0c\u5b83\u5141\u8bb8\u60a8\u7f16\u5199\u533f\u540d\u51fd\u6570\uff0c\u800c\u65e0\u9700\u521b\u5efa\u65b0\u7684\u7c7b\u3002\u5b83\u4eec\u901a\u5e38\u7528\u4e8e\u5bf9\u96c6\u5408\u6267\u884c\u64cd\u4f5c\u6216\u4f5c\u4e3a\u56de\u8c03\u51fd\u6570\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

(parameter) -> { implementation }<\/pre>\n
\u533f\u540d\u5185\u90e8\u7c7b<\/strong><\/p>\n
\u533f\u540d\u5185\u90e8\u7c7b\u662f Java \u4e2d\u7684\u4e00\u79cd\u5185\u90e8\u7c7b\uff0c\u5b83\u6ca1\u6709\u663e\u5f0f\u7684\u540d\u79f0\u3002\u5b83\u901a\u8fc7\u7ee7\u627f\u6216\u5b9e\u73b0\u7236\u7c7b\u6216\u63a5\u53e3\u6765\u5b9e\u73b0\u4e00\u4e2a\u4ee3\u7801\u5757\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n
new Superclass() {\n  @Override\n  public void method() { implementation }\n};<\/pre>\n
\u6bd4\u8f83<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n
\u7279\u5f81<\/th>\nlambda \u8868\u8fbe\u5f0f<\/th>\n\u533f\u540d\u5185\u90e8\u7c7b<\/th>\n<\/tr>\n<\/thead>\n
\u7b80\u6d01\u6027<\/td>\n\u66f4\u7b80\u6d01<\/td>\n\u66f4\u5197\u957f<\/td>\n<\/tr>\n
\u591a\u6001\u6027<\/td>\n\u53ea\u80fd\u5728\u51fd\u6570\u5f0f\u63a5\u53e3\u4e2d\u4f7f\u7528<\/td>\n\u53ef\u4ee5\u7ee7\u627f\u6216\u5b9e\u73b0\u7c7b\u6216\u63a5\u53e3<\/td>\n<\/tr>\n
\u5916\u90e8\u53d8\u91cf\u8bbf\u95ee\u6743\u9650<\/td>\n\u53ef\u4ee5\u8bbf\u95ee\u5916\u90e8\u53d8\u91cf<\/td>\n\u53ea\u80fd\u8bbf\u95ee\u58f0\u660e\u4e3a final \u7684\u5916\u90e8\u53d8\u91cf<\/td>\n<\/tr>\n
\u5185\u5b58\u5360\u7528<\/td>\n\u66f4\u9ad8\u6548<\/td>\n\u66f4\u5360\u5185\u5b58<\/td>\n<\/tr>\n
\u9002\u7528\u573a\u666f<\/td>\n\u7b80\u5355\u3001\u4e00\u6b21\u6027\u64cd\u4f5c<\/td>\n\u590d\u6742\u3001\u53ef\u91cd\u7528\u64cd\u4f5c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
\u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u7b5b\u9009\u96c6\u5408\uff1a<\/strong><\/p>\n
List<Integer> numbers = List.of(1, 2, 3, 4, 5);\nList<Integer> evenNumbers = numbers.stream()\n    .filter(x -> x % 2 == 0)\n    .toList();<\/pre>\n
\u4f7f\u7528\u533f\u540d\u5185\u90e8\u7c7b\u521b\u5efa\u7ebf\u7a0b\uff1a<\/strong><\/p>\n
Thread thread = new Thread() {\n  @Override\n  public void run() {\n    System.out.println(\"Thread is running.\");\n  }\n};\n\nthread.start();<\/pre>\n
\u7ed3\u8bba<\/strong><\/p>\n
lambda \u8868\u8fbe\u5f0f\u548c\u533f\u540d\u5185\u90e8\u7c7b\u90fd\u5177\u6709\u81ea\u5df1\u7684\u4f18\u7f3a\u70b9\u3002lambda \u8868\u8fbe\u5f0f\u66f4\u7b80\u6d01\uff0c\u9002\u7528\u4e8e\u7b80\u5355\u7684\u51fd\u6570\u5f0f\u64cd\u4f5c\uff0c\u800c\u533f\u540d\u5185\u90e8\u7c7b\u66f4\u9002\u7528\u4e8e\u590d\u6742\u3001\u53ef\u91cd\u7528\u7684\u64cd\u4f5c\u3002\u5728\u9009\u62e9\u4f7f\u7528\u54ea\u79cd\u65b9\u6cd5\u65f6\uff0c\u8003\u8651\u4ee5\u4e0b\u56e0\u7d20\uff1a<\/p>\n
    \n
  • \u7b80\u6d01\u6027\uff1a<\/strong>lambda \u8868\u8fbe\u5f0f\u66f4\u6613\u4e8e\u7f16\u5199\u548c\u9605\u8bfb\u3002<\/li>\n
  • \u591a\u6001\u6027\uff1a<\/strong>\u533f\u540d\u5185\u90e8\u7c7b\u5141\u8bb8\u591a\u6001\u6027\u3002<\/li>\n
  • \u5916\u90e8\u53d8\u91cf\u8bbf\u95ee\u6743\u9650\uff1a<\/strong>lambda \u8868\u8fbe\u5f0f\u53ef\u4ee5\u8bbf\u95ee\u6240\u6709\u5916\u90e8\u53d8\u91cf\uff0c\u800c\u533f\u540d\u5185\u90e8\u7c7b\u53ea\u80fd\u8bbf\u95ee\u58f0\u660e\u4e3a final \u7684\u53d8\u91cf\u3002<\/li>\n
  • \u5185\u5b58\u5360\u7528\uff1a<\/strong>lambda \u8868\u8fbe\u5f0f\u66f4\u8282\u7701\u5185\u5b58\u3002<\/li>\n
  • \u9002\u7528\u573a\u666f\uff1a<\/strong>\u5bf9\u4e8e\u7b80\u5355\u7684\u64cd\u4f5c\uff0clambda \u8868\u8fbe\u5f0f\u662f\u66f4\u597d\u7684\u9009\u62e9\uff0c\u5bf9\u4e8e\u590d\u6742\u7684\u64cd\u4f5c\uff0c\u533f\u540d\u5185\u90e8\u7c7b\u662f\u66f4\u597d\u7684\u9009\u62e9\u3002<\/li>\n<\/ul>\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","protected":false},"excerpt":{"rendered":"
    Java\u51fd\u6570\u4e0e\u533f\u540d\u5185\u90e8\u7c7b\u7684\u6bd4\u8f83 ...<\/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-202758","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202758","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=202758"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202758\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202758"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202758"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202758"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}