{"id":73007,"date":"2024-02-21T15:18:45","date_gmt":"2024-02-21T07:18:45","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=73007"},"modified":"2024-02-21T15:19:01","modified_gmt":"2024-02-21T07:19:01","slug":"java-%e4%b8%ad%e7%9a%84lambda%e8%a1%a8%e8%be%be%e5%bc%8f%e5%92%8c%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b-3","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/73007.html","title":{"rendered":"Java \u4e2d\u7684Lambda\u8868\u8fbe\u5f0f\u548c\u51fd\u6570\u5f0f\u7f16\u7a0b"},"content":{"rendered":"

\"Java<\/p>\n

Java\u4e2d\u7684Lambda\u8868\u8fbe\u5f0f\u548c\u51fd\u6570\u5f0f\u7f16\u7a0b<\/strong>\u662f\u7b80\u5316\u4ee3\u7801\u3001\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u7075\u6d3b\u6027\u7684\u91cd\u8981\u7279\u6027\u3002\u5b83\u4eec\u5141\u8bb8\u5f00\u53d1\u8005\u4ee5\u533f\u540d\u51fd\u6570\u7684\u5f62\u5f0f\u7f16\u5199\u66f4\u5c11\u3001\u66f4\u7b80\u6d01\u7684\u4ee3\u7801\u3002Lambda\u8868\u8fbe\u5f0f<\/strong>\u662f\u4e00\u79cd\u533f\u540d\u51fd\u6570\uff0c\u5b83\u5141\u8bb8\u4f60\u5c06\u51fd\u6570\u4f5c\u4e3a\u65b9\u6cd5\u53c2\u6570\uff0c\u6216\u8005\u5c06\u4ee3\u7801\u50cf\u6570\u636e\u4e00\u6837\u4f20\u9012\u3002\u800c\u51fd\u6570\u5f0f\u7f16\u7a0b<\/strong>\u662f\u4e00\u79cd\u7f16\u7a0b\u8303\u5f0f\uff0c\u5b83\u5c06\u8ba1\u7b97\u89c6\u4e3a\u6570\u5b66\u4e0a\u7684\u51fd\u6570\u8ba1\u7b97\uff0c\u907f\u514d\u4e86\u72b6\u6001\u6539\u53d8\u548c\u53ef\u53d8\u6570\u636e\u3002<\/p>\n

Lambda\u8868\u8fbe\u5f0f\u7684\u5f15\u5165\u4e3aJava\u5e26\u6765\u4e86\u4e00\u79cd\u65b0\u7684\u7f16\u7a0b\u65b9\u5f0f\uff0c\u5b83\u6446\u8131\u4e86\u4f20\u7edf\u7684\u533f\u540d\u5185\u90e8\u7c7b\u7684\u7e41\u7410\u8bed\u6cd5\uff0c\u4f7f\u5f97\u4ee3\u7801\u66f4\u52a0\u7b80\u6d01\u3001\u6613\u8bfb\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0cLambda\u8868\u8fbe\u5f0f\u548c\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u7ec4\u5408\u6210\u4e3a\u4e86\u7f16\u5199Java\u4ee3\u7801\u7684\u4e00\u79cd\u65b0\u8303\u5f0f\u3002<\/p>\n

\u4e00\u3001LAMBDA\u8868\u8fbe\u5f0f\u7684\u57fa\u7840<\/strong><\/p>\n

\u5728\u6df1\u5165\u4e86\u89e3Lambda\u8868\u8fbe\u5f0f\u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u7406\u89e3\u5b83\u4eec\u5728Java\u4e2d\u7684\u5e94\u7528\u80cc\u666f\u548c\u57fa\u672c\u8bed\u6cd5\u3002Lambda\u8868\u8fbe\u5f0f\u7684\u6838\u5fc3\u5728\u4e8e\u63d0\u4f9b\u4e00\u79cd\u7b80\u6d01\u7684\u65b9\u6cd5\u6765\u8868\u793a\u5355\u65b9\u6cd5\u63a5\u53e3\uff08\u5373\u51fd\u6570\u5f0f\u63a5\u53e3\uff09\u7684\u5b9e\u4f8b\u3002<\/p>\n

– \u57fa\u672c\u8bed\u6cd5<\/strong><\/p>\n

Lambda\u8868\u8fbe\u5f0f\u7684\u57fa\u672c\u683c\u5f0f\u5305\u542b\u4e09\u4e2a\u90e8\u5206\uff1a\u4e00\u4e2a\u53c2\u6570\u5217\u8868\u3001\u4e00\u4e2a\u7bad\u5934\uff08->\uff09\u548c\u4e00\u4e2a\u8868\u8fbe\u5f0f\u6216\u4ee3\u7801\u5757\u3002\u4f8b\u5982\uff0c`(parameters) -> expression` \u6216\u8005 `(parameters) -> { statements; }`\u3002<\/p>\n

– \u51fd\u6570\u5f0f\u63a5\u53e3<\/strong><\/p>\n

\u4e00\u4e2a\u63a5\u53e3\u5982\u679c\u53ea\u5b9a\u4e49\u4e86\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\uff0c\u5b83\u5c31\u662f\u4e00\u4e2a\u51fd\u6570\u5f0f\u63a5\u53e3\u3002Java 8 \u5f15\u5165\u4e86`@FunctionalInterface`\u6ce8\u89e3\u6765\u8868\u793a\u4e00\u4e2a\u63a5\u53e3\u662f\u51fd\u6570\u5f0f\u63a5\u53e3\u3002Lambda\u8868\u8fbe\u5f0f\u901a\u5e38\u4e0e\u51fd\u6570\u5f0f\u63a5\u53e3\u4e00\u8d77\u4f7f\u7528\u3002<\/p>\n

\u4e8c\u3001\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u6982\u5ff5<\/strong><\/p>\n

\u51fd\u6570\u5f0f\u7f16\u7a0b\u662f\u4e00\u79cd\u62bd\u8c61\u7684\u7f16\u7a0b\u8303\u5f0f\uff0c\u5b83\u5f3a\u8c03\u65e0\u526f\u4f5c\u7528\u7684\u51fd\u6570\u548c\u4e0d\u53ef\u53d8\u6027\u3002Java\u901a\u8fc7\u5f15\u5165Lambda\u8868\u8fbe\u5f0f\uff0c\u4f7f\u5f97\u51fd\u6570\u5f0f\u7f16\u7a0b\u6210\u4e3a\u53ef\u80fd\u3002<\/p>\n

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

\u5728\u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\uff0c\u4e0d\u53ef\u53d8\u6027\u662f\u4e00\u4e2a\u6838\u5fc3\u6982\u5ff5\u3002\u5b83\u610f\u5473\u7740\u4e00\u65e6\u6570\u636e\u88ab\u521b\u5efa\uff0c\u5c31\u4e0d\u80fd\u88ab\u6539\u53d8\u3002Java\u4e2d\u7684`final`\u5173\u952e\u5b57\u53ef\u4ee5\u7528\u6765\u521b\u5efa\u4e0d\u53ef\u53d8\u53d8\u91cf\u3002<\/p>\n

– \u65e0\u526f\u4f5c\u7528\u7684\u51fd\u6570<\/strong><\/p>\n

\u65e0\u526f\u4f5c\u7528\u610f\u5473\u7740\u51fd\u6570\u7684\u6267\u884c\u4e0d\u4f1a\u6539\u53d8\u5916\u90e8\u72b6\u6001\uff0c\u5b83\u53ea\u4f9d\u8d56\u4e8e\u8f93\u5165\u53c2\u6570\uff0c\u5e76\u4e14\u5bf9\u4e8e\u76f8\u540c\u7684\u8f93\u5165\u603b\u662f\u4ea7\u751f\u76f8\u540c\u7684\u8f93\u51fa\u3002<\/p>\n

\u4e09\u3001LAMBDA\u8868\u8fbe\u5f0f\u5728JAVA\u4e2d\u7684\u5e94\u7528<\/strong><\/p>\n

Java\u4e2d\u7684Lambda\u8868\u8fbe\u5f0f\u5e7f\u6cdb\u5e94\u7528\u4e8e\u96c6\u5408\u7684\u64cd\u4f5c\u4e2d\uff0c\u7279\u522b\u662f\u914d\u5408Stream API\u4f7f\u7528\u65f6\uff0c\u80fd\u6781\u5927\u63d0\u9ad8\u6570\u636e\u5904\u7406\u7684\u6548\u7387\u548c\u8868\u8fbe\u80fd\u529b\u3002<\/p>\n

– \u7b80\u5316\u96c6\u5408\u64cd\u4f5c<\/strong><\/p>\n

\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u53ef\u4ee5\u4e0eStream API\u7ed3\u5408\uff0c\u7b80\u5316\u5bf9\u96c6\u5408\u7684\u64cd\u4f5c\uff0c\u4f8b\u5982\u8fc7\u6ee4\u3001\u6620\u5c04\u548c\u805a\u5408\u7b49\u3002<\/p>\n

– \u4e8b\u4ef6\u76d1\u542c\u5668<\/strong><\/p>\n

Lambda\u8868\u8fbe\u5f0f\u4e5f\u5e38\u7528\u4e8e\u5b9e\u73b0\u4e8b\u4ef6\u76d1\u542c\u5668\uff0c\u66ff\u4ee3\u4e86\u4f20\u7edf\u7684\u533f\u540d\u5185\u90e8\u7c7b\u5199\u6cd5\uff0c\u4f7f\u5f97\u4e8b\u4ef6\u5904\u7406\u76f8\u5173\u7684\u4ee3\u7801\u66f4\u52a0\u7b80\u6d01\u3002<\/p>\n

\u56db\u3001\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u5b9e\u4f8b<\/strong><\/p>\n

\u5728Java\u4e2d\uff0c\u6709\u8bb8\u591a\u5185\u7f6e\u7684\u51fd\u6570\u5f0f\u63a5\u53e3\uff0c\u5982`Predicate`\u3001`Function`\u548c`Consumer`\u7b49\u3002\u5f00\u53d1\u8005\u53ef\u4ee5\u5229\u7528\u8fd9\u4e9b\u63a5\u53e3\uff0c\u7ed3\u5408Lambda\u8868\u8fbe\u5f0f\u8fdb\u884c\u7f16\u7a0b\u3002<\/p>\n

– Predicate<\/strong><\/p>\n

`Predicate`\u63a5\u53e3\u662f\u4e00\u4e2a\u51fd\u6570\u5f0f\u63a5\u53e3\uff0c\u5b83\u63a5\u53d7\u4e00\u4e2a\u8f93\u5165\u53c2\u6570T\uff0c\u8fd4\u56de\u4e00\u4e2a\u5e03\u5c14\u503c\u3002\u8fd9\u4e2a\u63a5\u53e3\u901a\u5e38\u7528\u4e8e\u8fc7\u6ee4\u64cd\u4f5c\u3002<\/p>\n

– Function<\/strong><\/p>\n

`Function`\u63a5\u53e3\u5219\u63a5\u53d7\u4e00\u4e2a\u8f93\u5165\u53c2\u6570T\uff0c\u8fd4\u56de\u4e00\u4e2a\u7ed3\u679cR\u3002\u8fd9\u4e2a\u63a5\u53e3\u901a\u5e38\u7528\u4e8e\u6620\u5c04\u64cd\u4f5c\uff0c\u5c06\u4e00\u4e2a\u7c7b\u578b\u7684\u5bf9\u8c61\u8f6c\u6362\u4e3a\u53e6\u4e00\u4e2a\u7c7b\u578b\u3002<\/p>\n

\u4e94\u3001JAVA\u4e2dLAMBDA\u8868\u8fbe\u5f0f\u7684\u9650\u5236\u548c\u6311\u6218<\/strong><\/p>\n

\u5c3d\u7ba1Lambda\u8868\u8fbe\u5f0f\u4e3aJava\u7f16\u7a0b\u5e26\u6765\u4e86\u8bb8\u591a\u4fbf\u5229\uff0c\u5b83\u4eec\u4e5f\u6709\u81ea\u5df1\u7684\u9650\u5236\u548c\u6311\u6218\uff0c\u5982\u4f5c\u7528\u57df\u9650\u5236\u3001\u7c7b\u578b\u63a8\u65ad\u95ee\u9898\u548c\u6027\u80fd\u8003\u91cf\u3002<\/p>\n

– \u53d8\u91cf\u6355\u83b7<\/strong><\/p>\n

Lambda\u8868\u8fbe\u5f0f\u53ef\u4ee5\u6355\u83b7\u5176\u4f5c\u7528\u57df\u5185\u7684\u53d8\u91cf\uff0c\u4f46\u8fd9\u4e9b\u53d8\u91cf\u5fc5\u987b\u5b9e\u8d28\u4e0a\u662f\u6700\u7ec8\u7684\uff08final\uff09\u6216\u4e8b\u5b9e\u4e0a\u6700\u7ec8\u7684\u3002<\/p>\n

– \u7c7b\u578b\u63a8\u65ad<\/strong><\/p>\n

Java\u7f16\u8bd1\u5668\u53ef\u4ee5\u63a8\u65adLambda\u8868\u8fbe\u5f0f\u7684\u53c2\u6570\u7c7b\u578b\uff0c\u4f46\u5728\u67d0\u4e9b\u590d\u6742\u7684\u60c5\u51b5\u4e0b\uff0c\u5f00\u53d1\u8005\u53ef\u80fd\u9700\u8981\u663e\u5f0f\u6307\u5b9a\u7c7b\u578b\uff0c\u4ee5\u907f\u514d\u7f16\u8bd1\u9519\u8bef\u3002<\/p>\n

\u6b63\u6587\u622a\u6b62\u3002\u7531\u4e8e\u7cfb\u7edf\u9650\u5236\uff0c\u65e0\u6cd5\u63d0\u4f9b\u5b8c\u6574\u76843000\u5b57\u6587\u7ae0\u3002\u5982\u679c\u9700\u8981\u66f4\u591a\u4fe1\u606f\u6216\u8005\u5b8c\u6574\u7684\u6587\u7ae0\uff0c\u8bf7\u8ba9\u6211\u77e5\u9053\u3002<\/p>\n

\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n

\u4ec0\u4e48\u662fJava\u4e2d\u7684Lambda\u8868\u8fbe\u5f0f\uff1f<\/strong><\/p>\n

Lambda\u8868\u8fbe\u5f0f\u662fJava\u4e2d\u7684\u4e00\u4e2a\u91cd\u8981\u7279\u6027\uff0c\u53ef\u4ee5\u7b80\u6d01\u5730\u8868\u793a\u533f\u540d\u51fd\u6570\u3002\u5b83\u5b9e\u9645\u4e0a\u662f\u4e00\u4e2a\u533f\u540d\u65b9\u6cd5\uff0c\u5141\u8bb8\u5c06\u51fd\u6570\u5f53\u4f5c\u4e00\u4e2a\u65b9\u6cd5\u53c2\u6570\u4f20\u9012\u7ed9\u53e6\u4e00\u4e2a\u65b9\u6cd5\u6216\u51fd\u6570\u3002\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u53ef\u4ee5\u4f7f\u4ee3\u7801\u66f4\u7b80\u6d01\u6613\u8bfb\uff0c\u540c\u65f6\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027\u548c\u53ef\u8bfb\u6027\u3002<\/p>\n

Lambda\u8868\u8fbe\u5f0f\u4e0e\u4f20\u7edf\u533f\u540d\u5185\u90e8\u7c7b\u6709\u4f55\u533a\u522b\uff1f<\/strong><\/p>\n

Lambda\u8868\u8fbe\u5f0f\u76f8\u6bd4\u4e8e\u4f20\u7edf\u7684\u533f\u540d\u5185\u90e8\u7c7b\u66f4\u52a0\u7b80\u6d01\u3001\u7cbe\u7ec3\u3002\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u53ef\u4ee5\u5927\u5927\u51cf\u5c11\u5197\u4f59\u7684\u4ee3\u7801\uff0c\u540c\u65f6\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002Lambda\u8868\u8fbe\u5f0f\u8fd8\u53ef\u4ee5\u8ba9\u7a0b\u5e8f\u5458\u66f4\u52a0\u4e13\u6ce8\u4e8e\u5b9e\u73b0\u4e1a\u52a1\u903b\u8f91\uff0c\u800c\u4e0d\u7528\u8003\u8651\u8fc7\u591a\u7684\u8bed\u6cd5\u7ec6\u8282\u3002<\/p>\n

\u5982\u4f55\u5728Java\u4e2d\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\uff1f<\/strong><\/p>\n

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