{"id":202814,"date":"2025-05-22T12:04:23","date_gmt":"2025-05-22T04:04:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202814\/"},"modified":"2025-05-22T12:04:23","modified_gmt":"2025-05-22T04:04:23","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8-java-%e4%b8%ad%e7%bc%96%e5%86%99%e5%8f%af%e9%87%8d%e7%94%a8%e5%92%8c%e5%8f%af%e6%89%a9%e5%b1%95%e7%9a%84-lambda-%e8%a1%a8%e8%be%be%e5%bc%8f%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202814\/","title":{"rendered":"\u5982\u4f55\u5728 Java \u4e2d\u7f16\u5199\u53ef\u91cd\u7528\u548c\u53ef\u6269\u5c55\u7684 Lambda \u8868\u8fbe\u5f0f\uff1f"},"content":{"rendered":"

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

\u5982\u4f55\u5728 Java \u4e2d\u7f16\u5199\u53ef\u91cd\u7528\u548c\u53ef\u6269\u5c55\u7684 Lambda \u8868\u8fbe\u5f0f\uff1f<\/h1>\n

\u6587\u7ae0<\/span>\u4e0d\u77e5\u9053\u5927\u5bb6\u662f\u5426\u719f\u6089\uff1f\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u300a\u5982\u4f55\u5728 Java \u4e2d\u7f16\u5199\u53ef\u91cd\u7528\u548c\u53ef\u6269\u5c55\u7684 Lambda \u8868\u8fbe\u5f0f\uff1f\u300b<\/span>\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u8bb2\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u5728\u770b\u5b8c\u672c\u7bc7\u6587\u7ae0\u540e\uff0c\u6709\u66f4\u597d\u7684\u5efa\u8bae\u6216\u8005\u53d1\u73b0\u54ea\u91cc\u6709\u95ee\u9898\uff0c\u5e0c\u671b\u5927\u5bb6\u90fd\u80fd\u79ef\u6781\u8bc4\u8bba\u6307\u51fa\uff0c\u8c22\u8c22\uff01\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u52a0\u6cb9\u8fdb\u6b65\uff01<\/p>\n

\u4e3a\u4e86\u7f16\u5199\u53ef\u91cd\u7528\u548c\u53ef\u6269\u5c55\u7684 Lambda \u8868\u8fbe\u5f0f\uff0c\u9075\u5faa\u4ee5\u4e0b\u539f\u5219\uff1a\u5c06 Lambda \u8868\u8fbe\u5f0f\u5c01\u88c5\u5728\u51fd\u6570\u5f0f\u63a5\u53e3\u4e2d\uff0c\u4ee5\u5b9e\u73b0\u53ef\u91cd\u7528\u6027\u3002\u901a\u8fc7\u6dfb\u52a0\u53c2\u6570\u6216\u8fd4\u56de\u4e0d\u540c\u7c7b\u578b\u6765\u6269\u5c55 Lambda \u8868\u8fbe\u5f0f\uff0c\u4ee5\u5b9e\u73b0\u53ef\u6269\u5c55\u6027\u3002<\/p>\n

<\/p>\n

\u5982\u4f55\u5728 Java \u4e2d\u7f16\u5199\u53ef\u91cd\u7528\u548c\u53ef\u6269\u5c55\u7684 Lambda \u8868\u8fbe\u5f0f<\/strong><\/p>\n

Lambda \u8868\u8fbe\u5f0f\u662f Java \u4e2d\u5f15\u5165\u7684\u4e00\u4e2a\u5f3a\u5927\u7684\u7279\u6027\uff0c\u5b83\u5141\u8bb8\u5f00\u53d1\u8005\u4f7f\u7528\u533f\u540d\u51fd\u6570\uff0c\u4ece\u800c\u7b80\u5316\u4ee3\u7801\u3002\u7136\u800c\uff0c\u4e3a\u4e86\u5145\u5206\u53d1\u6325 Lambda \u8868\u8fbe\u5f0f\u7684\u4f18\u52bf\uff0c\u786e\u4fdd\u5176\u53ef\u91cd\u7528\u6027\u548c\u53ef\u6269\u5c55\u6027\u81f3\u5173\u91cd\u8981\u3002<\/p>\n

\u53ef\u91cd\u7528\u6027<\/strong><\/p>\n

\u4e3a\u4e86\u5b9e\u73b0\u53ef\u91cd\u7528\u6027\uff0c\u53ef\u4ee5\u5c06 Lambda \u8868\u8fbe\u5f0f\u5c01\u88c5\u5728\u51fd\u6570\u5f0f\u63a5\u53e3\u4e2d\u3002\u51fd\u6570\u5f0f\u63a5\u53e3\u662f\u4ec5\u5305\u542b\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u7684\u63a5\u53e3\uff0c\u5141\u8bb8 Lambda \u8868\u8fbe\u5f0f\u4e0e\u4e4b\u5339\u914d\u3002\u4f8b\u5982\uff1a<\/p>\n

interface MyFunctionalInterface {\n    void apply(String input);\n}<\/pre>\n
\u7136\u540e\uff0c\u53ef\u4ee5\u5c06 Lambda \u8868\u8fbe\u5f0f\u5206\u914d\u7ed9\u8be5\u63a5\u53e3\uff1a<\/p>\n
MyFunctionalInterface myLambda = (String input) -> System.out.println(input);<\/pre>\n
\u901a\u8fc7\u4f7f\u7528\u51fd\u6570\u5f0f\u63a5\u53e3\uff0c\u53ef\u4ee5\u8f7b\u677e\u5730\u5728\u4e0d\u540c\u4e0a\u4e0b\u6587\u4e2d\u91cd\u7528 Lambda \u8868\u8fbe\u5f0f\u3002<\/p>\n
\u53ef\u6269\u5c55\u6027<\/strong><\/p>\n
\u53ef\u6269\u5c55\u6027\u662f\u6307 Lambda \u8868\u8fbe\u5f0f\u53ef\u4ee5\u6839\u636e\u4e0d\u540c\u7684\u9700\u6c42\u8fdb\u884c\u81ea\u5b9a\u4e49\u8c03\u6574\u3002\u53ef\u4ee5\u901a\u8fc7\u5c06\u53c2\u6570\u6dfb\u52a0\u5230\u51fd\u6570\u5f0f\u63a5\u53e3\u6216\u7f16\u5199\u8fd4\u56de\u4e0d\u540c\u7c7b\u578b\u7684 Lambda \u8868\u8fbe\u5f0f\u6765\u5b9e\u73b0\u8fd9\u4e00\u70b9\u3002<\/p>\n
interface MyParamFunctionalInterface {\n    void apply(String input, int value);\n}\n\n\/\/ \u5e26\u6709\u53c2\u6570\u7684 Lambda \u8868\u8fbe\u5f0f\nMyParamFunctionalInterface myParamLambda = (String input, int value) -> System.out.println(input + \" \" + value);<\/pre>\n
\/\/ \u8fd4\u56de\u4e0d\u540c\u7c7b\u578b\u7684 Lambda \u8868\u8fbe\u5f0f\nMyFunctionalInterface myReturnTypeLambda = () -> {\n    return 10;\n};<\/pre>\n
\u5b9e\u6218\u6848\u4f8b\uff1a<\/strong><\/p>\n
\u4e0b\u9762\u662f\u4e00\u4e2a\u8fd0\u7528\u53ef\u91cd\u7528\u548c\u53ef\u6269\u5c55 Lambda \u8868\u8fbe\u5f0f\u7684\u5b9e\u9645\u4f8b\u5b50\uff0c\u5b83\u4e3a\u4e00\u4e2a\u5217\u8868\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u6253\u5370\u4e00\u4e2a\u524d\u7f00\u3002<\/p>\n
import java.util.List;\n\npublic class Main {\n    public static void main(String[] args) {\n        \/\/ \u5b9a\u4e49\u4e00\u4e2a\u51fd\u6570\u5f0f\u63a5\u53e3\uff0c\u63a5\u6536\u4e00\u4e2a\u5b57\u7b26\u4e32\u4f5c\u4e3a\u53c2\u6570\n        FunctionalInterface<String, String> prefixFunction = (input) -> \"PREFIX_\" + input;\n\n        \/\/ \u521b\u5efa\u4e00\u4e2a\u5b57\u7b26\u4e32\u5217\u8868\n        List<String> names = List.of(\"John\", \"Mary\", \"Bob\");\n\n        \/\/ \u4f7f\u7528 Lambda \u8868\u8fbe\u5f0f\u4e3a\u6bcf\u4e2a\u5143\u7d20\u5e94\u7528\u524d\u7f00\n        List<String> prefixedNames = names.stream()\n                .map(prefixFunction::apply)\n                .toList();\n\n        \/\/ \u6253\u5370\u524d\u7f00\u540e\u7684\u5217\u8868\n        System.out.println(prefixedNames);\n    }\n}<\/pre>\n
\u901a\u8fc7\u9075\u5faa\u8fd9\u4e9b\u539f\u5219\uff0c\u53ef\u4ee5\u5728 Java \u4e2d\u7f16\u5199\u53ef\u91cd\u7528\u548c\u53ef\u6269\u5c55\u7684 Lambda \u8868\u8fbe\u5f0f\uff0c\u4ece\u800c\u589e\u5f3a\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027\u548c\u7075\u6d3b\u6027\u3002<\/p>\n
\u4eca\u5929\u5173\u4e8e\u300a\u5982\u4f55\u5728 Java \u4e2d\u7f16\u5199\u53ef\u91cd\u7528\u548c\u53ef\u6269\u5c55\u7684 Lambda \u8868\u8fbe\u5f0f\uff1f\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8ejava\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5982\u4f55\u5728 Java \u4e2d\u7f16\u5199\u53ef\u91cd\u7528\u548c...<\/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-202814","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202814","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=202814"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202814\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202814"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202814"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202814"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}