{"id":15960,"date":"2024-07-17T10:14:21","date_gmt":"2024-07-17T02:14:21","guid":{"rendered":"https:\/\/92it.top\/?p=15960"},"modified":"2024-07-17T10:14:21","modified_gmt":"2024-07-17T02:14:21","slug":"java%e5%87%bd%e6%95%b0%e5%bc%8f%e6%8e%a5%e5%8f%a3%ef%bc%8c%e4%b8%80%e6%96%87%e5%bd%bb%e5%ba%95%e5%89%96%e6%9e%90%ef%bc%81","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=15960","title":{"rendered":"Java\u51fd\u6570\u5f0f\u63a5\u53e3\uff0c\u4e00\u6587\u5f7b\u5e95\u5256\u6790\uff01"},"content":{"rendered":"\n

\u8f6c\u8f7d\uff1aJava\u51fd\u6570\u5f0f\u63a5\u53e3\uff0c\u4e00\u6587\u5f7b\u5e95\u5256\u6790\uff01<\/a><\/p>\n\n\n\n

\u81ea\u4ece Java 8 \u5f15\u5165\u51fd\u6570\u5f0f\u7f16\u7a0b\u540e\uff0c\u7ed9\u5f88\u591a Java \u7a0b\u5e8f\u5458\u5e26\u6765\u4e86\u798f\u97f3\uff0c\u51fd\u6570\u5f0f\u7f16\u7a0b\u662f\u4e00\u79cd\u4e13\u6ce8\u4e8e\u4f7f\u7528\u51fd\u6570\u6765\u521b\u5efa\u6e05\u6670\u7b80\u6d01\u7684\u4ee3\u7801\u7684\u8303\u5f0f\uff0c\u5b83\u4e0d\u50cf\u4f20\u7edf\u7684\u547d\u4ee4\u5f0f\u7f16\u7a0b\u90a3\u6837\u4fee\u6539\u6570\u636e\u548c\u7ef4\u62a4\u72b6\u6001\uff0c\u800c\u662f\u5c06\u51fd\u6570\u89c6\u4e3a\u4e00\u7b49\u516c\u6c11\u3002\u8fd9\u6837\u5c31\u53ef\u4ee5\u5c06\u5b83\u4eec\u5206\u914d\u7ed9\u53d8\u91cf\uff0c\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\uff0c\u5e76\u4ece\u5176\u4ed6\u51fd\u6570\u8fd4\u56de\uff0c\u8fd9\u79cd\u65b9\u6cd5\u53ef\u4ee5\u4f7f\u4ee3\u7801\u66f4\u6613\u4e8e\u7406\u89e3\u548c\u63a8\u7406\u3002<\/p>\n\n\n

\n
\"\"<\/figure><\/div>\n\n\n

Java\u4e3a\u4ec0\u4e48\u8981\u5f15\u5165\u51fd\u6570\u5f0f\u7f16\u7a0b\uff1f<\/strong><\/p>\n\n\n\n

\n\n\n\n

\u8fd1\u5e74\u6765\uff0c\u51fd\u6570\u5f0f\u7f16\u7a0b\u56e0\u5176\u80fd\u591f\u5e2e\u52a9\u7ba1\u7406\u590d\u6742\u6027\u800c\u8d8a\u6765\u8d8a\u53d7\u6b22\u8fce\uff0c\u5c24\u5176\u662f\u5728\u5927\u578b\u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u5b83\u5f3a\u8c03\u4e0d\u53d8\u6027\uff0c\u907f\u514d\u526f\u4f5c\u7528\uff0c\u5e76\u4ee5\u66f4\u53ef\u9884\u6d4b\u548c\u6a21\u5757\u5316\u7684\u65b9\u5f0f\u5904\u7406\u6570\u636e\uff0c\u8fd9\u6837\u53ef\u4ee5\u66f4\u8f7b\u677e\u5730\u6d4b\u8bd5\u548c\u7ef4\u62a4\u4ee3\u7801\u3002<\/p>\n\n\n\n

Java \u662f\u4e00\u79cd\u5178\u578b\u7684\u9762\u5411\u5bf9\u8c61\u8bed\u8a00\uff0c\u4e3a\u4ec0\u4e48\u4f1a\u5728 Java 8 \u4e2d\u5f15\u5165\u51fd\u6570\u5f0f\u7f16\u7a0b\u7279\u6027\uff1f\u4e3b\u8981\u539f\u56e0\u6709\u4ee5\u4e0b\u51e0\u70b9\uff1a<\/p>\n\n\n\n

    \n
  • \u7b80\u5316\u4ee3\u7801\uff1a\u51fd\u6570\u5f0f\u7f16\u7a0b\u53ef\u4ee5\u51cf\u5c11\u6837\u677f\u4ee3\u7801\uff0c\u4f7f\u4ee3\u7801\u66f4\u7b80\u6d01\uff0c\u4ece\u800c\u66f4\u6613\u4e8e\u7ef4\u62a4\u548c\u66f4\u597d\u7684\u53ef\u8bfb\u6027\u3002<\/li>\n\n\n\n
  • \u5e76\u53d1\u6027\u548c\u5e76\u884c\u6027\uff1a\u51fd\u6570\u5f0f\u7f16\u7a0b\u4e0e\u73b0\u4ee3\u591a\u6838\u67b6\u6784\u914d\u5408\u826f\u597d\uff0c\u53ef\u5b9e\u73b0\u9ad8\u6548\u7684\u5e76\u884c\u5904\u7406\uff0c\u800c\u65e0\u9700\u62c5\u5fc3\u5171\u4eab\u72b6\u6001\u6216\u526f\u4f5c\u7528\u3002<\/li>\n\n\n\n
  • \u8868\u73b0\u529b\u548c\u7075\u6d3b\u6027\uff1a\u901a\u8fc7\u91c7\u7528\u51fd\u6570\u5f0f\u63a5\u53e3\u548c Lambda \u8868\u8fbe\u5f0f\uff0cJava \u83b7\u5f97\u4e86\u66f4\u5177\u8868\u73b0\u529b\u7684\u8bed\u6cd5\uff0c\u4f7f\u6211\u4eec\u80fd\u591f\u7f16\u5199\u7075\u6d3b\u4e14\u9002\u5e94\u6027\u5f3a\u7684\u4ee3\u7801\u3002<\/li>\n<\/ul>\n\n\n\n

    \u5728 Java \u8bed\u8a00\u4e2d\uff0c\u51fd\u6570\u5f0f\u7f16\u7a0b\u4e3b\u8981\u56f4\u7ed5\u7740\u4ee5\u4e0b\u51e0\u4e2a\u5173\u952e\u6982\u5ff5\uff1a<\/p>\n\n\n\n

      \n
    • Lambda \u8868\u8fbe\u5f0f\uff1a\u5728\u9700\u8981\u63d0\u4f9b\u51fd\u6570\u63a5\u53e3\u7684\u4efb\u4f55\u5730\u65b9\u4f7f\u7528\u8fd9\u4e9b\u7d27\u51d1\u51fd\u6570\u3002\u5b83\u4eec\u6709\u52a9\u4e8e\u51cf\u5c11\u6837\u677f\u4ee3\u7801\u3002<\/li>\n\n\n\n
    • \u65b9\u6cd5\u5f15\u7528\uff1a\u8fd9\u4e9b\u662f\u5f15\u7528\u65b9\u6cd5\u7684\u7b80\u5199\u65b9\u5f0f\uff0c\u4f7f\u4ee3\u7801\u66f4\u52a0\u7b80\u6d01\u548c\u53ef\u8bfb\u3002<\/li>\n\n\n\n
    • \u51fd\u6570\u63a5\u53e3\uff1a\u8fd9\u4e9b\u662f\u5177\u6709\u5355\u4e2a\u62bd\u8c61\u65b9\u6cd5\u7684\u63a5\u53e3\uff0c\u975e\u5e38\u9002\u5408 Lambda \u8868\u8fbe\u5f0f\u548c\u65b9\u6cd5\u5f15\u7528\u3002\u5e38\u89c1\u793a\u4f8b\u5305\u62ec Predicate\u3001Function\u3001Consumer\u3001Supplier \u548c Operator\u3002<\/li>\n<\/ul>\n\n\n\n

      \u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u4f18\u7f3a\u70b9<\/strong><\/p>\n\n\n\n

      \n\n\n\n

      Java \u4e2d\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u7ed9\u5f00\u53d1\u5e26\u6765\u4e86\u8bb8\u591a\u4fbf\u5229\uff0c\u4f46\u540c\u65f6\u4e5f\u6709\u7f3a\u70b9\u548c\u6311\u6218\uff0c\u4e0b\u9762\u6574\u7406\u4e86\u4e00\u4e9b\u4e3b\u8981\u7684\u4f18\u7f3a\u70b9\uff1a<\/p>\n\n\n\n

      \u4f18\u70b9<\/strong><\/p>\n\n\n\n

      \n\n\n\n

      \u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u8bfb\u6027<\/strong><\/p>\n\n\n\n

      \u7531\u4e8e\u4f7f\u7528 Lambda \u8868\u8fbe\u5f0f\u548c\u65b9\u6cd5\u5f15\u7528\uff0c\u51fd\u6570\u4ee3\u7801\u5f80\u5f80\u975e\u5e38\u7b80\u6d01\uff0c\u4ece\u800c\u51cf\u5c11\u4e86\u6837\u677f\u4ee3\u7801\u5e76\u7b80\u5316\u4e86\u4ee3\u7801\u7ef4\u62a4\u3002\u5bf9\u4e0d\u53ef\u53d8\u6027\u7684\u5173\u6ce8\uff08\u5373\u6570\u636e\u7ed3\u6784\u5728\u521b\u5efa\u540e\u4fdd\u6301\u4e0d\u53d8\uff09\u6709\u52a9\u4e8e\u51cf\u5c11\u526f\u4f5c\u7528\uff0c\u5e76\u9632\u6b62\u56e0\u72b6\u6001\u610f\u5916\u66f4\u6539\u800c\u5bfc\u81f4\u7684\u9519\u8bef\u3002<\/p>\n\n\n\n

      \u4e0e\u5e76\u53d1\u548c\u5e76\u884c\u7684\u517c\u5bb9\u6027<\/strong><\/p>\n\n\n\n

      \u7531\u4e8e\u51fd\u6570\u5f0f\u7f16\u7a0b\u4fc3\u8fdb\u4e86\u4e0d\u53ef\u53d8\u6027\uff0c\u56e0\u6b64\u64cd\u4f5c\u53ef\u4ee5\u5e76\u884c\u8fd0\u884c\uff0c\u800c\u4e0d\u4f1a\u51fa\u73b0\u6570\u636e\u4e0d\u4e00\u81f4\u6216\u7ade\u4e89\u6761\u4ef6\u7684\u5e38\u89c1\u98ce\u9669\uff0c\u8fd9\u4f7f\u5f97\u4ee3\u7801\u66f4\u9002\u5408\u591a\u7ebf\u7a0b\u73af\u5883\u3002<\/p>\n\n\n\n

      \u6a21\u5757\u5316\u548c\u53ef\u91cd\u7528\u6027<\/strong><\/p>\n\n\n\n

      \u51fd\u6570\u5f0f\u7f16\u7a0b\u8fd8\u4fc3\u8fdb\u4e86\u6a21\u5757\u5316\u548c\u53ef\u91cd\u7528\u6027\uff0c\u7531\u4e8e\u51fd\u6570\u662f\u4e00\u7b49\u516c\u6c11\uff0c\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u5c0f\u7684\u3001\u53ef\u91cd\u7528\u7684\u7ec4\u4ef6\uff0c\u4ece\u800c\u4ea7\u751f\u66f4\u7b80\u6d01\u3001\u66f4\u6613\u4e8e\u7ef4\u62a4\u7684\u4ee3\u7801\u3002<\/p>\n\n\n\n

      \u964d\u4f4e\u4e86\u590d\u6742\u6027<\/strong><\/p>\n\n\n\n

      \u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u7684\u62bd\u8c61\u964d\u4f4e\u4e86\u6574\u4f53\u590d\u6742\u6027\uff0c\u4f7f\u6211\u4eec\u80fd\u591f\u4e13\u6ce8\u4e8e\u57fa\u672c\u903b\u8f91\uff0c\u800c\u4e0d\u5fc5\u62c5\u5fc3\u5b9e\u73b0\u7ec6\u8282\u3002<\/p>\n\n\n\n

      \u7f3a\u70b9<\/strong><\/p>\n\n\n\n

      \n\n\n\n

      \u5b66\u4e60\u96be\u5ea6\u5927<\/strong><\/p>\n\n\n\n

      \u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u5b66\u4e60\u66f2\u7ebf\u53ef\u80fd\u5f88\u9661\u5ced\uff0c\u7279\u522b\u662f\u5bf9\u4e8e\u4e60\u60ef\u4e8e\u9762\u5411\u8fc7\u7a0b\u6216\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u4eba\u6765\u8bf4\uff0c\u7531\u4e8e\u9ad8\u9636\u51fd\u6570\u548c\u4e0d\u53d8\u6027\u7b49\u6982\u5ff5\uff0c\u6211\u4eec\u7684\u601d\u7ef4\u65b9\u5f0f\u53ef\u80fd\u8981\u53d1\u751f\u663e\u8457\u7684\u53d8\u5316\u3002<\/p>\n\n\n\n

      \u7531\u4e8e\u6d89\u53ca\u62bd\u8c61\uff0c\u8c03\u8bd5\u51fd\u6570\u4ee3\u7801\u4e5f\u53ef\u80fd\u5177\u6709\u6311\u6218\u6027\uff0c\u7406\u89e3\u590d\u6742\u7684 Lambda \u8868\u8fbe\u5f0f\u53ef\u80fd\u9700\u8981\u66f4\u6df1\u5165\u5730\u4e86\u89e3\u51fd\u6570\u6982\u5ff5\u3002<\/p>\n\n\n\n

      \u6027\u80fd\u5f00\u9500<\/strong><\/p>\n\n\n\n

      \u6027\u80fd\u5f00\u9500\u662f\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u53e6\u4e00\u4e2a\u95ee\u9898\uff0c\u5c24\u5176\u662f\u7531\u4e8e\u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u9891\u7e41\u7684\u5bf9\u8c61\u521b\u5efa\u548c\u9644\u52a0\u51fd\u6570\u8c03\u7528\uff0c\u8fd9\u53ef\u80fd\u4f1a\u5f71\u54cd\u8d44\u6e90\u53d7\u9650\u73af\u5883\u4e2d\u7684\u6027\u80fd\u3002<\/p>\n\n\n\n

      \u517c\u5bb9\u6027\u95ee\u9898<\/strong><\/p>\n\n\n\n

      \u4e0e\u65e7\u7cfb\u7edf\u6216\u5e93\u7684\u96c6\u6210\u53ef\u80fd\u4f1a\u51fa\u73b0\u517c\u5bb9\u6027\u95ee\u9898\uff0c\u56e0\u4e3a\u5b83\u4eec\u53ef\u80fd\u4e0d\u662f\u4e3a\u51fd\u6570\u5f0f\u7f16\u7a0b\u8bbe\u8ba1\u7684\uff0c\u4ece\u800c\u5bfc\u81f4\u96c6\u6210\u56f0\u96be\u3002<\/p>\n\n\n\n

      \u7075\u6d3b\u6027<\/strong><\/p>\n\n\n\n

      \u6700\u540e\uff0c\u51fd\u6570\u5f0f\u7f16\u7a0b\u5bf9\u4e0d\u53ef\u53d8\u6027\u548c\u65e0\u526f\u4f5c\u7528\u51fd\u6570\u7684\u5173\u6ce8\u53ef\u80fd\u4f1a\u964d\u4f4e\u5728\u9700\u8981\u53ef\u53d8\u6027\u6216\u590d\u6742\u5bf9\u8c61\u64cd\u4f5c\u7684\u573a\u666f\u4e2d\u7684\u7075\u6d3b\u6027\u3002<\/p>\n\n\n\n

      \u603b\u7684\u6765\u8bf4\uff0c\u867d\u7136\u51fd\u6570\u5f0f\u7f16\u7a0b\u63d0\u4f9b\u4e86\u663e\u8457\u7684\u597d\u5904\uff0c\u5982\u63d0\u9ad8\u53ef\u8bfb\u6027\u548c\u66f4\u5bb9\u6613\u7684\u5e76\u53d1\u6027\uff0c\u4f46\u5b83\u4e5f\u5e26\u6765\u4e86\u6311\u6218\uff0c\u56e0\u6b64\u6211\u4eec\u9700\u8981\u540c\u65f6\u8003\u8651\u8fd9\u4e9b\u4f18\u7f3a\u70b9\uff0c\u4ece\u800c\u66f4\u597d\u7684\u628a\u63e1\u51fd\u6570\u5f0f\u7f16\u7a0b\u662f\u5426\u9002\u5e94\u5f53\u524d\u7684 Java \u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n\n\n\n

      @FunctionalInterface<\/strong><\/p>\n\n\n\n

      \n\n\n\n

      Java \u662f\u5982\u4f55\u5b9a\u4e49\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\uff1f<\/p>\n\n\n\n

      \u4e0b\u56fe\u4e3a @FunctionalInterface<\/code> \u5728 JDK\u4e2d\u6e90\u7801\u7684\u5177\u4f53\u4fe1\u606f\uff1a<\/p>\n\n\n

      \n
      \"\"<\/figure><\/div>\n\n\n

      \u901a\u8fc7\u4e0a\u8ff0\u6e90\u7801\uff0c\u6211\u4eec\u53ef\u4ee5\u5f97\u5230\u4ee5\u4e0b\u4fe1\u606f\uff1a<\/p>\n\n\n\n

        \n
      • @FunctionalInterface<\/code> \u6ce8\u89e3\u4f4d\u4e8e java.lang<\/code> \u5305\u4e0b\uff0c\u5b83\u662f Java \u4e2d\u4e00\u4e2a\u7279\u6b8a\u7684\u6807\u8bb0\uff0c\u4f7f\u63a5\u53e3\u6210\u4e3a\u51fd\u6570\u5f0f\u63a5\u53e3\uff0c\u4f7f\u5f97\u5b83\u53ef\u4ee5\u5f88\u597d\u5730\u7528\u4f5c Lambda \u8868\u8fbe\u5f0f\u6216\u65b9\u6cd5\u5f15\u7528\u7684\u76ee\u6807\u3002<\/li>\n\n\n\n
      • \u5728\u51fd\u6570\u5f0f\u63a5\u53e3\u4e2d\uff0c\u6709\u4e14\u53ea\u80fd\u6709\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\uff0c\u5982\u679c\u5728\u63a5\u53e3\u4e2d\u6dfb\u52a0\u66f4\u591a\u7684\u62bd\u8c61\u65b9\u6cd5\uff0c\u7f16\u8bd1\u5668\u5c06\u751f\u6210\u9519\u8bef\uff0c\u4ece\u800c\u786e\u4fdd\u51fd\u6570\u63a5\u53e3\u7684\u5b8c\u6574\u6027\u3002<\/li>\n\n\n\n
      • \u51fd\u6570\u5f0f\u63a5\u53e3\u662f Java \u652f\u6301\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u6838\u5fc3\uff0c\u5b83\u4eec\u5141\u8bb8\u6211\u4eec\u901a\u8fc7\u4f7f\u7528 Lambda \u8868\u8fbe\u5f0f\u3001\u51cf\u5c11\u6837\u677f\u4ee3\u7801\u548c\u4fc3\u8fdb\u53ef\u91cd\u7528\u6027\u6765\u7f16\u5199\u66f4\u7b80\u6d01\u3001\u66f4\u7b80\u6d01\u7684\u4ee3\u7801\u3002<\/li>\n\n\n\n
      • \u51fd\u6570\u5f0f\u63a5\u53e3\u4e2d\u5141\u8bb8\u5b58\u5728 default<\/code>\u65b9\u6cd5\uff0c\u56e0\u4e3a\u5b83\u4e0d\u662f\u62bd\u8c61\u7684\uff0c\u8fd9\u4e5f\u5c31\u610f\u5473\u51fd\u6570\u5f0f\u63a5\u53e3\u4e2d\u53ef\u4ee5\u5b58\u5728\u591a\u4e2a\u65b9\u6cd5\uff0c\u4f46\u662f\u53ea\u80fd\u6709\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u3002<\/li>\n\n\n\n
      • @FunctionalInterface<\/code> \u6ce8\u89e3\u53ea\u80fd\u5e94\u7528\u5728\u63a5\u53e3\u4e0a\uff0c\u4e0d\u80fd\u5e94\u7528\u4e8e\u6ce8\u89e3\u7c7b\u578b\u3001\u679a\u4e3e\u6216\u7c7b\u3002<\/li>\n\n\n\n
      • \u53e6\u5916\uff0c\u6709\u4e9b\u63a5\u53e3\u5c3d\u7ba1\u5b83\u6ca1\u6709 @FunctionalInterface<\/code> \u6ce8\u89e3\uff0c\u7136\u800c\u5b83\u53ea\u6709\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\uff0c\u56e0\u6b64\u8be5\u63a5\u53e3\u672c\u8d28\u4e0a\u4e5f\u662f\u51fd\u6570\u5f0f\u63a5\u53e3\uff0c\u56e0\u6b64 @FunctionalInterface<\/code> \u6ce8\u89e3\u5e76\u4e0d\u662f\u5fc5\u987b\u7684\uff0c\u4f46\u662f\u589e\u52a0\u8be5\u6ce8\u91ca\u662f\u4e00\u79cd\u5f88\u4f18\u96c5\u7684\u884c\u4e3a\uff0c\u56e0\u4e3a\u5b83\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\uff0c\u5f3a\u5236\u6267\u884c\u7ea6\u675f\uff0c\u5e76\u5e2e\u52a9\u5176\u4ed6\u4eba\u7406\u89e3\u6211\u4eec\u7684\u610f\u56fe\uff0c\u6709\u52a9\u4e8e\u63d0\u9ad8\u4ee3\u7801\u5e93\u7684\u53ef\u7ef4\u62a4\u6027\u548c\u4e00\u81f4\u6027\u3002<\/li>\n<\/ul>\n\n\n\n

        \u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u4f7f\u7528<\/strong><\/p>\n\n\n\n

        \n\n\n\n

        Java \u7684\u51fd\u6570\u5f0f\u63a5\u53e3\u6709\u5f88\u591a\u4e30\u5bcc\u7684\u4f7f\u7528\u65b9\u5f0f\uff0c\u8fd9\u91cc\u4e3b\u8981\u4ece\u81ea\u5b9a\u4e49\u51fd\u6570\u5f0f\u63a5\u53e3<\/code>\u548c\u5185\u5efa\u51fd\u6570\u5f0f\u63a5\u53e3<\/code>\u4e24\u4e2a\u5927\u65b9\u5411\u8fdb\u884c\u5206\u6790\u3002<\/p>\n\n\n

        \n
        \"\"<\/figure><\/div>\n\n\n

        \u81ea\u5b9a\u4e49\u51fd\u6570\u5f0f\u63a5\u53e3<\/strong><\/p>\n\n\n\n

        \n\n\n\n

        \u4ece\u4e0a\u6587\u7684\u8bb2\u89e3\u6211\u4eec\u53ef\u4ee5\u77e5\u9053\uff1aJava \u7684\u51fd\u6570\u5f0f\u63a5\u53e3\u672c\u8d28\u4e0a\u53ea\u6709\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u8fd9\u4e2a\u7279\u5f81\u6765\u8bbe\u8ba1\u4e00\u4e2a\u7b80\u5355\u7684\u8ba1\u7b97\u5668\u793a\u4f8b\uff0c\u63a5\u6536\u4e24\u4e2a\u6574\u6570\u5165\u53c2\u5e76\u8fd4\u56de\u7b97\u672f\u8fd0\u7b97\u7684\u7ed3\u679c\u3002<\/p>\n\n\n\n

        \u4e3a\u4e86\u5b9e\u73b0\u8fd9\u4e00\u70b9\uff0c\u6211\u4eec\u5b9a\u4e49\u4e00\u4e2a\u540d\u4e3a Calculator \u7684\u51fd\u6570\u63a5\u53e3\uff0c\u5e76\u4e14\u5305\u542b\u4e00\u4e2a operate() \u62bd\u8c61\u65b9\u6cd5\uff0c\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n

        @FunctionalInterface\ninterface Calculator {\n    int operate(int a, int b);\n}<\/pre>\n\n\n\n
        \u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0cCalculator \u63a5\u53e3\u589e\u52a0\u4e86 @FunctionalInterface<\/code>\u6ce8\u89e3\uff0c\u5b83\u6e05\u6670\u5730\u8868\u660e Calculator \u662f\u51fd\u6570\u5f0f\u63a5\u53e3\uff0c\u5f3a\u8c03\u5b83\u5e94\u8be5\u53ea\u5305\u542b\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5 operate()\u3002<\/p>\n\n\n\n
        operate() \u65b9\u6cd5 \uff0c\u5b83\u63a5\u53d7\u4e24\u4e2a\u6574\u6570\u5165\u53c2\u5e76\u8fd4\u56de\u4e00\u4e2a\u6574\u6570\u7ed3\u679c\uff0c\u901a\u8fc7\u8fd9\u4e2a\u51fd\u6570\u63a5\u53e3\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 Lambda \u8868\u8fbe\u5f0f\u521b\u5efa\u4e0d\u540c\u7684\u7b97\u672f\u8fd0\u7b97\uff0c\u6bd4\u5982\u52a0\u6cd5\u3001\u51cf\u6cd5\u3001\u4e58\u6cd5\u548c\u9664\u6cd5\uff0c\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n
        @Test\nvoid operateTest() {\n    \/\/ \u4f7f\u7528 Lambda \u5b9a\u4e49\u64cd\u4f5c\n    Calculator add = (a, b) -> a + b;      \/\/ \u52a0\u6cd5\n    Calculator subtract = (a, b) -> a - b; \/\/ \u51cf\u6cd5\n    Calculator multiply = (a, b) -> a * b; \/\/ \u4e58\u6cd5\n    Calculator divide = (a, b) -> a \/ b;   \/\/ \u9664\u6cd5\n    \/\/ \u9a8c\u8bc1\u7ed3\u679c\n    assertEquals(15, add.operate(10, 5));\n    assertEquals(5, subtract.operate(10, 5));\n    assertEquals(50, multiply.operate(10, 5));\n    assertEquals(2, divide.operate(10, 5));\n}<\/pre>\n\n\n\n
        \u5728 operateTest \u8fd9\u4e2a\u6d4b\u8bd5\u65b9\u6cd5\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u4f7f\u7528 Calculator \u4e3a\u52a0\u51cf\u4e58\u9664 4\u4e2a\u8fd0\u7b97\u5b9a\u4e49\u4e86 Lambda \u8868\u8fbe\u5f0f\uff0c\u7136\u540e\u4f7f\u7528\u65ad\u8a00\u6765\u9a8c\u8bc1 operate()<\/code> \u65b9\u6cd5\u7684\u7b97\u672f\u8fd0\u7b97\u7ed3\u679c\u4e0e\u9884\u671f\u503c\u662f\u5426\u5339\u914d\u3002<\/p>\n\n\n\n
        \u901a\u8fc7\u8fd9\u4e2a\u793a\u4f8b\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u81ea\u5b9a\u4e49\u51fd\u6570\u5f0f\u63a5\u53e3\u5f88\u7075\u6d3b\u7684\u5b9a\u4e49 Lambda\u8868\u8fbe\u5f0f\uff0c\u5b9e\u73b0\u51fd\u6570\u5f0f\u7f16\u7a0b\u3002<\/p>\n\n\n\n
        Java\u5185\u5efa\u51fd\u6570\u5f0f\u63a5\u53e3<\/strong><\/p>\n\n\n\n
        \n\n\n\n
        \u4ece Java 8 \u5f00\u59cb\uff0c \u5728 java.util.function<\/code> \u5305\u91cc\u9762\u63d0\u4f9b\u4e86\u5f88\u591a\u5185\u7f6e\u7684\u51fd\u6570\u63a5\u53e3\uff0c\u4e0b\u9762\u5217\u4e3e\u4e86\u51e0\u4e2a\u6700\u5e38\u89c1\u7684\u5185\u7f6e\u51fd\u6570\u5f0f\u63a5\u53e3\u4ee5\u53ca\u5b83\u4eec\u7684\u5178\u578b\u7528\u4f8b\u548c\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n\n\n\n
        Predicate<T><\/code><\/strong><\/p>\n\n\n\n
        Predicate<T><\/code> \u8868\u793a\u63a5\u53d7 T \u7c7b\u578b\u7684\u8f93\u5165\u5e76\u8fd4\u56de\u5e03\u5c14\u503c\u7684\u51fd\u6570\uff0c\u901a\u5e38\u7528\u4e8e\u7b5b\u9009\u548c\u6761\u4ef6\u68c0\u67e5\u3002\u6e90\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n
        @FunctionalInterface\npublic interface Predicate<T> {\n  \/**\n   * Evaluates this predicate on the given argument.\n   *\n   * @param t the input argument\n   * @return {@code true} if the input argument matches the predicate,\n   * otherwise {@code false}\n   *\/\n    boolean test(T t);\n    \n    \/\/ default methods\n}<\/pre>\n\n\n\n
        \u4f7f\u7528\u4e3e\u4f8b\uff1a<\/p>\n\n\n\n
          \n
        • \u68c0\u67e5\u6570\u5b57\u662f\u5426\u4e3a\u5076\u6570<\/li>\n\n\n\n
        • \u6839\u636e\u957f\u5ea6\u7b5b\u9009\u5b57\u7b26\u4e32\u5217\u8868<\/li>\n\n\n\n
        • \u9a8c\u8bc1\u7528\u6237\u8f93\u5165<\/li>\n<\/ul>\n\n\n\n
          \u5982\u4e0b\u4ee3\u7801\uff0cPredicate<Integer><\/code> \u88ab\u5b9a\u4e49\u4e3a isEven\uff0c\u5b83\u68c0\u67e5\u4e00\u4e2a\u6570\u662f\u5426\u662f\u5076\u6570\u3002\u7136\u540e\uff0c\u6211\u4eec\u4f7f\u7528 filter \u65b9\u6cd5\u548c isEven \u8c13\u8bcd\u6765\u7b5b\u9009\u51fa\u5076\u6570\uff0c\u5e76\u5c06\u7ed3\u679c\u6536\u96c6\u5230\u4e00\u4e2a\u65b0\u7684\u5217\u8868\u4e2d\u3002<\/p>\n\n\n\n
          import java.util.Arrays;\nimport java.util.List;\nimport java.util.function.Predicate;\nimport java.util.stream.Collectors;\n\npublic class PredicateExample {\n    public static void main(String[] args) {\n        List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);\n        Predicate<Integer> isEven = n -> n % 2 == 0;\n        List<Integer> evenNumbers = numbers.stream().filter(isEven).collect(Collectors.toList());\n        System.out.println(\"Even numbers: \" + evenNumbers);\n    }\n}<\/pre>\n\n\n\n
          Function<T, R><\/code><\/strong><\/p>\n\n\n\n
          Function<T, R><\/code> \u8868\u793a\u51fd\u6570\u63a5\u53d7 T \u7c7b\u578b\u7684\u8f93\u5165\u5e76\u8fd4\u56de R \u7c7b\u578b\u7684\u7ed3\u679c\uff0c\u901a\u5e38\u7528\u4e8e\u8f6c\u6362\u6216\u6620\u5c04\u64cd\u4f5c\u3002\u6e90\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n
          @FunctionalInterface\npublic interface Function<T, R> {\n  \/**\n   * Applies this function to the given argument.\n   *\n   * @param t the function argument\n   * @return the function result\n   *\/ \n  R apply(T t);\n  \n  \/\/ default methods\n}<\/pre>\n\n\n\n
          \u4f7f\u7528\u4e3e\u4f8b\uff1a<\/p>\n\n\n\n
            \n
          • \u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5927\u5199<\/li>\n\n\n\n
          • \u5c06\u5458\u5de5\u5bf9\u8c61\u6620\u5c04\u5230\u5176\u5de5\u8d44<\/li>\n\n\n\n
          • \u5c06\u5b57\u7b26\u4e32\u89e3\u6790\u4e3a\u6574\u6570<\/li>\n<\/ul>\n\n\n\n
            \u5982\u4e0b\u4ee3\u7801\uff0cFunction<Integer, Integer><\/code> \u88ab\u5b9a\u4e49\u4e3a square\uff0c\u5b83\u8ba1\u7b97\u4e00\u4e2a\u6574\u6570\u7684\u5e73\u65b9\u3002\u6211\u4eec\u4f7f\u7528 map \u65b9\u6cd5\u548c square \u51fd\u6570\u5c06\u6240\u6709\u6574\u6570\u8f6c\u6362\u4e3a\u5b83\u4eec\u7684\u5e73\u65b9\uff0c\u5e76\u5c06\u7ed3\u679c\u6536\u96c6\u5230\u4e00\u4e2a\u65b0\u7684\u5217\u8868\u4e2d\u3002<\/p>\n\n\n\n
            import java.util.Arrays;\nimport java.util.List;\nimport java.util.function.Function;\nimport java.util.stream.Collectors;\n\npublic class FunctionExample {\n    public static void main(String[] args) {\n        List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5);\n        Function<Integer, Integer> square = n -> n * n;\n        List<Integer> squares = numbers.stream().map(square).collect(Collectors.toList());\n        System.out.println(\"Squares: \" + squares);\n    }\n}<\/pre>\n\n\n\n
            Consumer<T><\/code><\/strong><\/p>\n\n\n\n
            Consumer<T><\/code> \u8868\u793a\u63a5\u53d7 T \u7c7b\u578b\u7684\u8f93\u5165\u5e76\u6267\u884c\u64cd\u4f5c\u800c\u4e0d\u8fd4\u56de\u7ed3\u679c\u7684\u51fd\u6570\uff0c\u975e\u5e38\u9002\u5408\u6253\u5370\u6216\u8bb0\u5f55\u7b49\u526f\u4f5c\u7528\u64cd\u4f5c\u3002\u6e90\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n
            @FunctionalInterface\npublic interface Consumer<T> {\n  \/**\n   * Performs this operation on the given argument.\n   * @param t the input argument\n   *\/\n    void accept(T t);\n    \n    \/\/ default methods\n}<\/pre>\n\n\n\n
            \u4f7f\u7528\u4e3e\u4f8b\uff1a<\/p>\n\n\n\n
              \n
            • \u8bb0\u5f55\u7528\u6237\u64cd\u4f5c<\/li>\n\n\n\n
            • \u6253\u5370\u6570\u5b57\u5217\u8868<\/li>\n\n\n\n
            • \u66f4\u65b0\u5bf9\u8c61\u5c5e\u6027<\/li>\n<\/ul>\n\n\n\n
              \u5982\u4e0b\u4ee3\u7801\uff0cConsumer<String><\/code> \u88ab\u5b9a\u4e49\u4e3a printName\uff0c\u5b83\u6253\u5370\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002\u7136\u540e\uff0c\u6211\u4eec\u4f7f\u7528 forEach \u65b9\u6cd5\u548c printName \u6d88\u8d39\u8005\u5bf9\u5217\u8868\u4e2d\u7684\u6bcf\u4e2a\u5b57\u7b26\u4e32\u8fdb\u884c\u6253\u5370\u3002<\/p>\n\n\n\n
              import java.util.Arrays;\nimport java.util.List;\nimport java.util.function.Consumer;\n\npublic class ConsumerExample {\n    public static void main(String[] args) {\n        List<String> names = Arrays.asList(\"Tom\", \"Bob\", \"Cherry\");\n        Consumer<String> printName = name -> System.out.println(name);\n        names.forEach(printName);\n    }\n}<\/pre>\n\n\n\n
              Supplier<T><\/code><\/strong><\/p>\n\n\n\n
              Supplier<T><\/code> \u8868\u793a\u8be5\u51fd\u6570\u63d0\u4f9b T \u7c7b\u578b\u7684\u503c\u800c\u4e0d\u91c7\u7528\u4efb\u4f55\u53c2\u6570\uff0c\u5bf9\u4e8e\u5ef6\u8fdf\u521d\u59cb\u5316\u548c\u5ef6\u8fdf\u8ba1\u7b97\u5f88\u6709\u7528\u3002\u6e90\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n
              @FunctionalInterface\npublic interface Supplier<T> {\n  \/**\n   * Gets a result.\n   * @return a result\n   *\/\n  T get();\n  \n  \/\/ default methods\n}<\/pre>\n\n\n\n
              \u4f7f\u7528\u4e3e\u4f8b\uff1a<\/p>\n\n\n\n
                \n
              • \u521b\u5efa\u65b0\u7684\u5bf9\u8c61\u5b9e\u4f8b<\/li>\n\n\n\n
              • \u751f\u6210\u968f\u673a\u6570<\/li>\n\n\n\n
              • \u63d0\u4f9b\u9ed8\u8ba4\u503c<\/li>\n<\/ul>\n\n\n\n
                \u5982\u4e0b\u4ee3\u7801\uff0cSupplier<Double><\/code> \u88ab\u5b9a\u4e49\u4e3a randomSupplier\uff0c\u5b83\u8fd4\u56de\u4e00\u4e2a\u968f\u673a\u6570\uff0c\u6211\u4eec\u4f7f\u7528 get \u65b9\u6cd5\u6765\u8c03\u7528\u4f9b\u5e94\u5546\u5e76\u83b7\u53d6\u968f\u673a\u6570\u3002<\/p>\n\n\n\n
                import java.util.function.Supplier;\nimport java.util.Random;\n\npublic class SupplierExample {\n    public static void main(String[] args) {\n        Supplier<Double> randomSupplier = () -> new Random().nextDouble();\n\n        System.out.println(\"Random number: \" + randomSupplier.get());\n        System.out.println(\"Random number: \" + randomSupplier.get());\n    }\n}<\/pre>\n\n\n\n
                BiFunction<T,T,T><\/code><\/strong><\/p>\n\n\n\n
                BinaryOperator<T, T, T><\/code>\uff0c\u8868\u793a\u8be5\u51fd\u6570\u63a5\u53d7\u4e24\u4e2a T \u7c7b\u578b\u7684\u8f93\u5165\u5e76\u8fd4\u56de\u76f8\u540c\u7c7b\u578b\u7684\u7ed3\u679c\uff0c\u53ef\u7528\u4e8e\u7ec4\u5408\u6216\u51cf\u5c11\u64cd\u4f5c\u3002\u6e90\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                @FunctionalInterface\npublic interface BiFunction<T, U, R> {\n\n    \/**\n     * Applies this function to the given arguments.\n     *\n     * @param t the first function argument\n     * @param u the second function argument\n     * @return the function result\n     *\/\n    R apply(T t, U u);\n  \/\/ default methods\n}\n@FunctionalInterface\npublic interface BinaryOperator<T> extends BiFunction<T,T,T> {\n    \n}<\/pre>\n\n\n\n
                \u4f7f\u7528\u4e3e\u4f8b\uff1a<\/p>\n\n\n\n
                  \n
                • \u6c42\u4e24\u4e2a\u503c\u7684\u6700\u5927\u503c<\/li>\n\n\n\n
                • \u5c06\u4e24\u4e2a\u6570\u5b57\u76f8\u52a0<\/li>\n\n\n\n
                • \u8fde\u63a5\u5b57\u7b26\u4e32<\/li>\n<\/ul>\n\n\n\n
                  \u5982\u4e0b\u4ee3\u7801\uff0cBinaryOperator<Integer><\/code> \u88ab\u5b9a\u4e49\u4e3a\u5c06\u4e24\u4e2a\u6574\u6570\u76f8\u52a0\u3002\u6211\u4eec\u4f7f\u7528 apply() \u65b9\u6cd5\u6765\u8c03\u7528\u64cd\u4f5c\u7b26\u5e76\u83b7\u53d6\u7ed3\u679c\u3002\u6e90\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                  import java.util.function.BinaryOperator;\n\npublic class BinaryOperatorExample {\n    public static void main(String[] args) {\n        BinaryOperator<Integer> add = (a, b) -> a + b;\n\n        int result = add.apply(3, 5);\n        System.out.println(\"Result: \" + result); \/\/ \u8f93\u51fa: Result: 8\n    }\n}<\/pre>\n\n\n\n
                  Java 8 \u4e2d\u7684\u8fd9\u4e9b\u5185\u7f6e\u51fd\u6570\u63a5\u53e3\u4e3a\u51fd\u6570\u5f0f\u7f16\u7a0b\u5960\u5b9a\u4e86\u57fa\u7840\uff0c\u4f7f\u6211\u4eec\u80fd\u591f\u4f7f\u7528 Lambda \u8868\u8fbe\u5f0f\u5e76\u7b80\u5316\u4ee3\u7801\u3002\u7531\u4e8e\u5b83\u4eec\u7684\u591a\u529f\u80fd\u6027\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u5b83\u4eec\u7528\u4e8e\u5e7f\u6cdb\u7684\u5e94\u7528\uff0c\u4ece\u6570\u636e\u8f6c\u6362\u5230\u8fc7\u6ee4\u7b49\u7b49\u3002<\/p>\n\n\n\n
                  Lambda \u8868\u8fbe\u5f0f<\/strong><\/p>\n\n\n\n
                  \n\n\n\n
                  \u89e3\u91ca<\/strong><\/p>\n\n\n\n
                  Lambda \u8868\u8fbe\u5f0f\u662f Java 8 \u7684\u4e00\u4e2a\u5173\u952e\u7279\u6027\uff0c\u5b83\u5141\u8bb8\u6211\u4eec\u4ee5\u6e05\u6670\u7b80\u6d01\u7684\u65b9\u5f0f\u521b\u5efa\u7d27\u51d1\u7684\u533f\u540d\u51fd\u6570\uff0c\u63d0\u4f9b\u4e86\u4e00\u79cd\u4ee5\u66f4\u7b80\u5355\u7684\u5f62\u5f0f\u8868\u793a\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u65b9\u6cd5\uff0c\u56e0\u6b64\uff0cLambda \u8868\u8fbe\u5f0f\u662f Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u57fa\u77f3\u3002<\/p>\n\n\n\n
                  Lambda \u8868\u8fbe\u5f0f\u7684\u4e00\u822c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                  () -> {}<\/pre>\n\n\n\n
                  Lambda \u5305\u542b\u4e09\u4e2a\u90e8\u5206\uff1a<\/p>\n\n\n\n
                    \n
                  • ()<\/code> \u4ee3\u8868\u5165\u53c2\uff0c\u8868\u793a Lambda \u51fd\u6570\u7684\u8f93\u5165\u53c2\u6570\uff0c\u591a\u4e2a\u53c2\u6570\u7528\u9017\u53f7\u5206\u9694\uff0c\u5982\u679c\u53ea\u6709\u4e00\u4e2a\u53c2\u6570\uff0c\u62ec\u53f7\u53ef\u4ee5\u7701\u7565\uff1b<\/li>\n\n\n\n
                  • -><\/code> \u4ee3\u8868\u7bad\u5934\u8fd0\u7b97\u7b26\uff0c\u5b83\u5c06\u53c2\u6570\u4e0e Lambda \u8868\u8fbe\u5f0f\u7684\u4e3b\u4f53\u5206\u5f00\uff1b<\/li>\n\n\n\n
                  • {}<\/code> \u4ee3\u8868\u4e3b\u4f53\uff0c\u5b83\u5305\u542b\u51fd\u6570\u903b\u8f91\uff0c\u5982\u679c\u53ea\u6709\u4e00\u6761\u8bed\u53e5\uff0c\u5927\u62ec\u53f7\u53ef\u4ee5\u7701\u7565\uff1b<\/li>\n<\/ul>\n\n\n\n
                    \u4e3b\u4f53\u53ea\u6709\u4e00\u6761\u8bed\u53e5\u7684 Lambda \u8868\u8fbe\u5f0f\u793a\u4f8b\uff1a<\/p>\n\n\n\n
                    Function<String, String> toUpper = s -> s == null ? null : s.toUpperCase();\n<\/pre>\n\n\n\n
                    \u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0c\u56e0\u4e3a\u53ea\u6709\u4e00\u4e2a\u53c2\u6570\uff0c\u6240\u4ee5 ()<\/code> \u88ab\u7701\u7565\u4e86\uff0c\u56e0\u4e3a\u4e3b\u4f53\u53ea\u6709\u4e00\u8bed\u53e5\uff0c\u6240\u4ee5 {}<\/code> \u88ab\u7701\u7565\u4e86\u3002<\/p>\n\n\n\n
                    \u4e3b\u4f53\u5305\u542b\u591a\u6761\u8bed\u53e5\u7684 Lambda \u8868\u8fbe\u5f0f\u793a\u4f8b\uff1a<\/p>\n\n\n\n
                    IntToLongFunction factorial =\n    n -> {\n      int result = 0L;\n      for (int i = 0; i <= n; i++) {\n        result += i;\n      }\n      return result;\n    };<\/pre>\n\n\n\n
                    \u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0c\u56e0\u4e3a\u53ea\u6709\u4e00\u4e2a\u53c2\u6570\uff0c\u6240\u4ee5 ()<\/code> \u88ab\u7701\u7565\u4e86\uff0c\u56e0\u4e3a\u4e3b\u4f53\u5305\u542b\u591a\u6761\u8bed\u53e5\uff0c\u6240\u4ee5 {}<\/code> \u4e0d\u80fd\u88ab\u7701\u7565\u3002<\/p>\n\n\n\n
                    \u4e0a\u8ff0\u4e24\u4e2a\u793a\u4f8b\uff0c\u4f7f\u7528 Lambda \u8868\u8fbe\u5f0f\u6765\u521b\u5efa\u533f\u540d\u51fd\u6570\uff0c\u8fd9\u4f7f\u5f97\u6211\u4eec\u80fd\u591f\u7f16\u5199\u5185\u8054\u903b\u8f91\uff0c\u800c\u65e0\u9700\u989d\u5916\u7684\u7c7b\u5b9a\u4e49\u3002\u6211\u4eec\u53ef\u4ee5\u5728\u9700\u8981\u6211\u4eec\u4f20\u9012\u51fd\u6570\u63a5\u53e3\u7684\u5730\u65b9\u4f7f\u7528\u8fd9\u79cd\u533f\u540d\u51fd\u6570\u3002<\/p>\n\n\n\n
                    \u5de5\u4f5c\u539f\u7406<\/strong><\/p>\n\n\n\n
                    \n\n\n\n
                    \u672c\u6587\uff0c\u6211\u4eec\u5c06\u901a\u8fc7 Lambda \u8868\u8fbe\u5f0f\u7684 Java \u4ee3\u7801\u548c JVM \u5b57\u8282\u7801\u7684\u5bf9\u6bd4\u6765\u63a2\u7a76 Lambda\u7684\u5185\u90e8\u5de5\u4f5c\u539f\u7406\u3002<\/p>\n\n\n\n
                    \u5728 Java \u4e2d\uff0c\u6211\u4eec\u6709\u4e24\u79cd\u7c7b\u578b\u7684\u503c\uff1a\u539f\u751f\u7c7b\u578b\u548c\u5bf9\u8c61\u5f15\u7528\uff0c\u800c Lambda \u663e\u7136\u4e0d\u662f\u539f\u751f\u7c7b\u578b\uff0c\u5b83\u5b9e\u9645\u4e0a\u662f\u4e00\u79cd\u8fd4\u56de\u5bf9\u8c61\u5f15\u7528\u7684\u7279\u6b8a\u8868\u8fbe\u5f0f\uff0c\u6709\u4eba\u628a\u5b83\u53eb\u4f20\u51fd\u6570\u3002<\/p>\n\n\n\n
                    \u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u7528 LambdaTest \u6d4b\u8bd5\u7c7b\u6765\u5bf9 num \u8fdb\u884c\u52a0\u500d\u64cd\u4f5c\uff0c\u5e76\u67e5\u770b\u5176\u5b57\u8282\u7801\u4f5c\u4e3a\u6f14\u793a\uff0c\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                    public class LambdaTest {\n    LongFunction<Long> doubleNum = num -> 2 * num;\n}<\/pre>\n\n\n\n
                    \u4f7f\u7528 javap -c -p<\/code> \u6307\u4ee4\u7f16\u8bd1\u5176\u5b57\u8282\u7801\uff0c\u6307\u4ee4\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                    javap -c -p LambdaTest.class<\/pre>\n\n\n\n
                    \u6307\u4ee4\u6267\u884c\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                    Compiled from \"LambdaTest.java\"\npublic class com.yuanjava.LambdaTest {\n    java.util.function.LongFunction<java.lang.Long> doubleNum;\n\n  public com.yuanjava.LambdaTest();\n    Code:\n    0: aload_0\n    1: invokespecial #1                  \/\/ Method java\/lang\/Object.\"<init>\":()V\n    4: aload_0\n    5: invokedynamic #2,  0              \/\/ InvokeDynamic #0:apply:()Ljava\/util\/function\/LongFunction;\n    10: putfield      #3                  \/\/ Field doubleNum:Ljava\/util\/function\/LongFunction;\n    13: return\n\n    private static java.lang.Long lambda$new$0(long);\n    Code:\n    0: ldc2_w        #4                  \/\/ long 2l\n    3: lload_0\n    4: lmul\n    5: invokestatic  #6                  \/\/ Method java\/lang\/Long.valueOf:(J)Ljava\/lang\/Long;\n    8: areturn\n}<\/pre>\n\n\n\n
                    \u4ece\u4e0a\u9762\u7684\u5b57\u8282\u7801\u53ef\u4ee5\u770b\u51fa\u5b83\u662f\u4ee5invokedynamic<\/code> \u8c03\u7528\u5f00\u5934\uff0c\u6574\u4e2a\u8fc7\u7a0b\u5206\u6790\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                      \n
                    • \u7f16\u8bd1<\/strong>\uff1aJava \u7f16\u8bd1\u5668\u5e76\u6ca1\u6709\u4e3a Lambda \u751f\u6210\u65b0\u7684\u533f\u540d\u5185\u90e8\u7c7b\uff0c\u800c\u662f\u4f7f\u7528\u4e86 Java 7 \u4e2d\u5f15\u5165\u7684 invokedynamic \u6280\u672f\uff1b<\/li>\n\n\n\n
                    • InvokeDynamic<\/strong>\uff1ainvokedynamic \u6307\u4ee4\u652f\u6301 JVM \u4e0a\u7684\u52a8\u6001\u8bed\u8a00\uff0c\u5b83\u53ef\u4ee5\u5c06 JVM \u5bf9 Lambda \u5b9e\u4f8b\u7684\u521b\u5efa\u63a8\u8fdf\u5230\u8fd0\u884c\u9636\u6bb5\uff0c\u4e0e\u4f20\u7edf\u7684\u533f\u540d\u5185\u90e8\u7c7b\u76f8\u6bd4\uff0c\u8fd9\u63d0\u4f9b\u4e86\u66f4\u5927\u7684\u7075\u6d3b\u6027\u548c\u6548\u7387\u3002<\/li>\n\n\n\n
                    • Lambda Metafactory<\/strong>\uff1a\u5f53 JVM \u5728\u8fd0\u884c\u65f6\u9047\u5230 invokedynamic \u6307\u4ee4\uff0c\u5b83\u4f1a\u8c03\u7528\u4e00\u4e2a\u540d\u4e3a LambdaMetafactory.metafactory() \u7684\u7279\u6b8a\u65b9\u6cd5\uff0c\u6b64\u65b9\u6cd5\u8d1f\u8d23\u521b\u5efa Lambda \u8868\u8fbe\u5f0f\u7684\u5b9e\u9645\u5b9e\u73b0\u3002JVM \u4f1a\u4f7f\u7528\u6b64\u5143\u5de5\u5382\u65b9\u6cd5\u751f\u6210\u8868\u793a Lambda \u7684\u8f7b\u91cf\u7ea7\u7c7b\u6216\u65b9\u6cd5\u53e5\u67c4\u3002<\/li>\n\n\n\n
                    • \u521b\u5efa\u5b9e\u4f8b<\/strong>\uff1aLambdaMetafactory \u4f1a\u52a8\u6001\u521b\u5efa Lambda \u8868\u8fbe\u5f0f\u7684\u5b9e\u4f8b\uff1a\n
                        \n
                      • \u5982\u679c Lambda \u662f\u65e0\u72b6\u6001\u7684\uff08\u5b83\u4e0d\u4f1a\u4ece\u5c01\u95ed\u4f5c\u7528\u57df\u6355\u83b7\u4efb\u4f55\u53d8\u91cf\uff09\uff0c\u5219\u6b64\u5b9e\u4f8b\u901a\u5e38\u662f\u5355\u4f8b\u3002<\/li>\n\n\n\n
                      • \u5982\u679c Lambda \u6355\u83b7\u53d8\u91cf\uff0c\u5b83\u5c06\u4f7f\u7528\u8fd9\u4e9b\u6355\u83b7\u7684\u503c\u521b\u5efa\u4e00\u4e2a\u65b0\u5b9e\u4f8b\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n
                      • \u8fd0\u884c<\/strong>\uff1a\u8fd0\u884c Lambda \u8868\u8fbe\u5f0f\uff0c\u5c31\u5982\u540c\u5b9e\u73b0\u51fd\u6570\u63a5\u53e3\u7684\u533f\u540d\u5185\u90e8\u7c7b\u7684\u5b9e\u4f8b\u4e00\u6837\uff0cJVM \u4f1a\u786e\u4fdd Lambda \u7b26\u5408\u9884\u671f\u51fd\u6570\u63a5\u53e3\u7684\u5355\u4e00\u62bd\u8c61\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n\n\n\n
                        Lambda\u548c\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u5173\u7cfb<\/strong><\/p>\n\n\n\n
                        \n\n\n\n
                        \u4e0a\u6587\uff0c\u6211\u4eec\u5206\u6790\u4e86\u51fd\u6570\u5f0f\u63a5\u53e3\u4ee5\u53ca Lambda\uff0c\u90a3\u4e48\u4e24\u8005\u5b58\u5728\u4ec0\u4e48\u5173\u7cfb\u5462\uff1f<\/p>\n\n\n\n
                        \u5728\u7f16\u7a0b\u8bed\u8a00\u4e2d\uff0clambda \u8868\u8fbe\u5f0f\u548c\u51fd\u6570\u5f0f\u63a5\u53e3\u901a\u5e38\u5728\u4e00\u8d77\u4f7f\u7528\uff0c\u5c24\u5176\u5728\u652f\u6301\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u8bed\u8a00\u4e2d\uff08\u6bd4\u5982 Java \u548c Python\uff09\u3002\u5b83\u4eec\u4e4b\u95f4\u7684\u5173\u7cfb\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u51e0\u70b9\u6765\u7406\u89e3\uff1a<\/p>\n\n\n\n
                          \n
                        • Lambda \u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u8bed\u6cd5\u901a\u5e38\u8f83\u4e3a\u7b80\u6d01\u7684\u533f\u540d\u51fd\u6570\uff0c\u5373\u6ca1\u6709\u540d\u79f0\u7684\u51fd\u6570\uff0c\u5b83\u53ef\u4ee5\u7528\u6765\u7b80\u6d01\u5730\u8868\u793a\u4e00\u4e2a\u51fd\u6570\u6216\u65b9\u6cd5\u3002<\/li>\n\n\n\n
                        • \u51fd\u6570\u5f0f\u63a5\u53e3\u662f\u4e00\u4e2a\u53ea\u5305\u542b\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u7684\u63a5\u53e3\uff0c\u8fd9\u79cd\u63a5\u53e3\u53ef\u4ee5\u6709\u591a\u4e2a\u9ed8\u8ba4\u65b9\u6cd5\u6216\u9759\u6001\u65b9\u6cd5\uff0c\u4f46\u53ea\u80fd\u6709\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u3002<\/li>\n\n\n\n
                        • \u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u4e3b\u8981\u76ee\u7684\u662f\u7528\u4f5c Lambda \u8868\u8fbe\u5f0f\u7684\u76ee\u6807\u7c7b\u578b\u3002<\/li>\n\n\n\n
                        • \u5728 Java \u4e2d\uff0cLambda \u8868\u8fbe\u5f0f\u53ef\u4ee5\u88ab\u8d4b\u503c\u7ed9\u4e00\u4e2a\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u5f15\u7528<\/li>\n\n\n\n
                        • Lambda \u8868\u8fbe\u5f0f\u901a\u8fc7\u5b9e\u73b0\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u62bd\u8c61\u65b9\u6cd5\uff0c\u5c06\u884c\u4e3a\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\uff0c\u4ece\u800c\u5b9e\u73b0\u4e86\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u7406\u5ff5<\/li>\n<\/ul>\n\n\n\n
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                          \u603b\u7ed3<\/strong><\/p>\n\n\n\n
                          \n\n\n\n
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