{"id":202891,"date":"2025-05-22T08:07:18","date_gmt":"2025-05-22T00:07:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202891\/"},"modified":"2025-05-22T08:07:18","modified_gmt":"2025-05-22T00:07:18","slug":"java%e5%87%bd%e6%95%b0%e5%bc%8f%e6%8e%a5%e5%8f%a3%e7%9a%84%e7%ae%80%e5%8c%96%e5%bd%a2%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202891\/","title":{"rendered":"Java\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u7b80\u5316\u5f62\u5f0f"},"content":{"rendered":"

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

Java\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u7b80\u5316\u5f62\u5f0f<\/h1>\n

\u5404\u4f4d\u5c0f\u4f19\u4f34\u4eec\uff0c\u5927\u5bb6\u597d\u5440\uff01\u770b\u770b\u4eca\u5929\u6211\u53c8\u7ed9\u5404\u4f4d\u5e26\u6765\u4e86\u4ec0\u4e48\u6587\u7ae0\uff1f\u672c\u6587\u6807\u9898\u662f<\/span>\u300aJava\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u7b80\u5316\u5f62\u5f0f\u300b<\/span>\uff0c\u5f88\u660e\u663e\u662f\u5173\u4e8e\u6587\u7ae0<\/span>\u7684\u6587\u7ae0\u54c8\u54c8\u54c8\uff0c\u5176\u4e2d\u5185\u5bb9\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\uff0c\u5982\u679c\u80fd\u5e2e\u5230\u4f60\uff0c\u89c9\u5f97\u5f88\u4e0d\u9519\u7684\u8bdd\uff0c\u6b22\u8fce\u5404\u4f4d\u591a\u591a\u70b9\u8bc4\u548c\u5206\u4eab\uff01<\/span><\/p>\n

Java 8 \u4e2d\u7684 Lambda \u8868\u8fbe\u5f0f\u901a\u8fc7\u7b80\u5316\u51fd\u6570\u5f0f\u63a5\u53e3\uff0c\u63d0\u4f9b\u4e86\u7b80\u6d01\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u4ee3\u7801\u7f16\u5199\u65b9\u5f0f\u3002\u5176\u8bed\u6cd5\u4e3a (parameters) -&gt; expression\uff0c\u5176\u4e2d parameters \u4e3a\u63a5\u53d7\u7684\u53c2\u6570\u5217\u8868\uff0cexpression \u4e3a\u6267\u884c\u7684\u4ee3\u7801\u5757\u3002Lambda \u8868\u8fbe\u5f0f\u7684\u597d\u5904\u5305\u62ec\uff1a\u7b80\u6d01\u6027\uff1a\u7b80\u5316\u4e86\u4ee3\u7801\uff0c\u589e\u5f3a\u53ef\u8bfb\u6027\u3002\u533f\u540d\u6027\uff1a\u533f\u540d\uff0c\u65e0\u9700\u5b9a\u4e49\u6216\u5b9e\u73b0\u5176\u4ed6\u63a5\u53e3\u6216\u7c7b\u3002\u6613\u7528\u6027\uff1a\u53ef\u5728\u652f\u6301\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u4efb\u4f55\u5730\u65b9\u4f7f\u7528\u3002<\/p>\n

<\/p>\n

Java \u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u7b80\u5316\u5f62\u5f0f<\/strong><\/p>\n

Java \u51fd\u6570\u5f0f\u63a5\u53e3\u4e3a\u5f00\u53d1\u4eba\u5458\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u6d01\u3001\u53ef\u8bfb\u7684\u65b9\u6cd5\u6765\u7f16\u5199\u548c\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u98ce\u683c\u7684\u4ee3\u7801\u3002\u4e3a\u4e86\u8fdb\u4e00\u6b65\u7b80\u5316\u4ee3\u7801\uff0cJava 8 \u5f15\u5165\u4e86\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u7b80\u5316\u5f62\u5f0f\uff0c\u79f0\u4e3a Lambda \u8868\u8fbe\u5f0f\u3002<\/p>\n

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

Lambda \u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u533f\u540d\u51fd\u6570\uff0c\u5b83\u53ef\u4ee5\u5728\u4ee3\u7801\u5757\u5185\u5b9a\u4e49\u548c\u4f7f\u7528\u3002\u5176\u8bed\u6cd5\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

(parameters) -> expression<\/pre>\n
\u5176\u4e2d parameters<\/code> \u662f Lambda \u8868\u8fbe\u5f0f\u63a5\u53d7\u7684\u53c2\u6570\u5217\u8868\uff0cexpression<\/code> \u662f\u5b83\u8981\u6267\u884c\u7684\u4ee3\u7801\u5757\u3002<\/p>\n
\u5b9e\u6218\u6848\u4f8b\uff1a\u5b9e\u73b0\u4e00\u4e2a\u6c42\u548c\u51fd\u6570<\/strong><\/p>\n
\u4f7f\u7528 Lambda \u8868\u8fbe\u5f0f\uff0c\u6211\u4eec\u53ef\u4ee5\u7b80\u5316\u4e00\u4e2a\u6c42\u548c\u4e24\u4e2a\u6574\u6570\u7684\u51fd\u6570\uff1a<\/p>\n
import java.util.function.BinaryOperator;\n\npublic class LambdaSumExample {\n\n    public static void main(String[] args) {\n        BinaryOperator<Integer> sum = (x, y) -> x + y;\n\n        int result = sum.apply(10, 20);\n        System.out.println(result); \/\/ \u8f93\u51fa\uff1a30\n    }\n}<\/pre>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cBinaryOperator<Integer><\/code> \u662f\u4e00\u4e2a\u51fd\u6570\u5f0f\u63a5\u53e3\uff0c\u8868\u793a\u4e00\u4e2a\u63a5\u53d7\u4e24\u4e2a int<\/code> \u578b\u53c2\u6570\u5e76\u8fd4\u56de\u4e00\u4e2a int<\/code> \u578b\u7ed3\u679c\u7684\u51fd\u6570\u3002\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a Lambda \u8868\u8fbe\u5f0f\uff0c\u5b83\u5b9e\u73b0\u4e86 sum<\/code> \u65b9\u6cd5\uff0c\u5b83\u63a5\u6536\u4e24\u4e2a\u6574\u6570\u5e76\u8fd4\u56de\u5b83\u4eec\u7684\u548c\u3002<\/p>\n
\u597d\u5904<\/strong><\/p>\n
Lambda \u8868\u8fbe\u5f0f\u63d0\u4f9b\u4e86\u4ee5\u4e0b\u597d\u5904\uff1a<\/p>\n
    \n
  • \u7b80\u6d01\u6027\uff1a<\/strong>\u5b83\u4eec\u53ef\u4ee5\u6781\u5927\u5730\u7b80\u5316\u4ee3\u7801\uff0c\u4f7f\u4e4b\u66f4\u5177\u53ef\u8bfb\u6027\u3002<\/li>\n
  • \u533f\u540d\u6027\uff1a<\/strong>\u5b83\u4eec\u662f\u533f\u540d\u7684\uff0c\u4e0d\u9700\u8981\u5b9a\u4e49\u6216\u5b9e\u73b0\u5176\u4ed6\u63a5\u53e3\u6216\u7c7b\u3002<\/li>\n
  • \u6613\u7528\u6027\uff1a<\/strong>\u5b83\u4eec\u53ef\u5728 Java \u4e2d\u4efb\u4f55\u652f\u6301\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u5730\u65b9\u4f7f\u7528\u3002<\/li>\n<\/ul>\n
    \u901a\u8fc7\u4f7f\u7528 Lambda \u8868\u8fbe\u5f0f\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u7f16\u5199\u66f4\u7b80\u6d01\u3001\u53ef\u91cd\u590d\u4f7f\u7528\u548c\u53ef\u7ef4\u62a4\u7684 Java \u4ee3\u7801\u3002<\/p>\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\u5f0f\u63a5\u53e3\u7684\u7b80\u5316\u5f62\u5f0f \u5404...<\/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-202891","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202891","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=202891"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202891\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202891"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202891"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202891"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}