{"id":203085,"date":"2025-05-22T09:06:30","date_gmt":"2025-05-22T01:06:30","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203085\/"},"modified":"2025-05-22T09:06:30","modified_gmt":"2025-05-22T01:06:30","slug":"lambda-%e8%a1%a8%e8%be%be%e5%bc%8f%e5%a6%82%e4%bd%95%e5%88%9b%e5%bb%ba%e5%8f%82%e6%95%b0%e5%8c%96-java-%e5%87%bd%e6%95%b0%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203085\/","title":{"rendered":"lambda \u8868\u8fbe\u5f0f\u5982\u4f55\u521b\u5efa\u53c2\u6570\u5316 Java \u51fd\u6570\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>lambda \u8868\u8fbe\u5f0f\u5982\u4f55\u521b\u5efa\u53c2\u6570\u5316 Java \u51fd\u6570\uff1f<\/h1>\n<p>\u7f16\u7a0b\u5e76\u4e0d\u662f\u4e00\u4e2a\u673a\u68b0\u6027\u7684\u5de5\u4f5c\uff0c\u800c\u662f\u9700\u8981\u6709\u601d\u8003\uff0c\u6709\u521b\u65b0\u7684\u5de5\u4f5c\uff0c\u8bed\u6cd5\u662f\u56fa\u5b9a\u7684\uff0c\u4f46\u89e3\u51b3\u95ee\u9898\u7684\u601d\u8def\u5219\u662f\u4f9d\u9760\u4eba\u7684\u601d\u7ef4\uff0c\u8fd9\u5c31\u9700\u8981\u6211\u4eec\u575a\u6301\u5b66\u4e60\u548c\u66f4\u65b0\u81ea\u5df1\u7684\u77e5\u8bc6\u3002\u4eca\u5929\u5c31\u6574\u7406\u5206\u4eab\u300alambda \u8868\u8fbe\u5f0f\u5982\u4f55\u521b\u5efa\u53c2\u6570\u5316 Java \u51fd\u6570\uff1f\u300b\uff0c\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec\uff0c\u5982\u679c\u4f60\u5bf9\u6587\u7ae0\u65b9\u9762\u7684\u77e5\u8bc6\u70b9\u611f\u5174\u8da3\uff0c\u5c31\u4e0d\u8981\u9519\u8fc7\uff0c\u5728\u8fd9\u53ef\u4ee5\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5f00\u53d1\u80fd\u529b\u7684\u63d0\u5347\u3002<\/p>\n<p>Java \u4e2d\uff0clambda \u8868\u8fbe\u5f0f\u53ef\u521b\u5efa\u53c2\u6570\u5316\u51fd\u6570\uff0c\u4ee5\u52a8\u6001\u8bbe\u7f6e\u51fd\u6570\u884c\u4e3a\u3002\u8bed\u6cd5\uff1a(\u53c2\u6570\u7c7b\u578b \u53c2\u6570\u540d) -&gt; { \/\/ \u51fd\u6570\u4f53}\u5e94\u7528\uff1a\u901a\u8fc7\u5b9a\u4e49\u53c2\u6570\u7c7b\u578b\u63a5\u53d7\u4e0d\u540c\u53c2\u6570\uff0c\u52a8\u6001\u8bbe\u7f6e\u51fd\u6570\u884c\u4e3a\uff0c\u7b80\u5316\u4ee3\u7801\uff0c\u63d0\u9ad8\u7b80\u6d01\u6027\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241028\/1730079571671eeb531751f.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>lambda \u8868\u8fbe\u5f0f\uff1a\u521b\u5efa\u53c2\u6570\u5316 Java \u51fd\u6570<\/strong><\/p>\n<p>lambda \u8868\u8fbe\u5f0f\u662f\u533f\u540d\u51fd\u6570\uff0c\u53ef\u7b80\u5316\u4ee3\u7801\u5e76\u4f7f\u5176\u66f4\u7b80\u6d01\u3002\u5728 Java \u4e2d\uff0clambda \u8868\u8fbe\u5f0f\u53ef\u4ee5\u521b\u5efa\u53c2\u6570\u5316\u51fd\u6570\uff0c\u4ee5\u4fbf\u4e3a\u4e0d\u540c\u53c2\u6570\u52a8\u6001\u8bbe\u7f6e\u51fd\u6570\u884c\u4e3a\u3002<\/p>\n<p><strong>\u8bed\u6cd5<\/strong><\/p>\n<p>\u53c2\u6570\u5316 lambda \u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>(\u53c2\u6570\u7c7b\u578b \u53c2\u6570\u540d) -&gt; {\n  \/\/ \u51fd\u6570\u4f53\n}<\/pre>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u4ee5\u4e0b\u4ee3\u7801\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u521b\u5efa\u53c2\u6570\u5316 Java \u51fd\u6570\uff1a<\/p>\n<pre>import java.util.function.Function;\n\npublic class ParameterizedLambda {\n\n  public static void main(String[] args) {\n    \/\/ \u521b\u5efa\u53c2\u6570\u5316 lambda \u8868\u8fbe\u5f0f\uff0c\u8be5\u8868\u8fbe\u5f0f\u7684\u53c2\u6570\u7c7b\u578b\u4e3a String\uff0c\u8fd4\u56de\u503c\u7c7b\u578b\u4e3a Integer\n    Function&lt;String, Integer&gt; stringToInt = s -&gt; Integer.parseInt(s);\n\n    \/\/ \u8c03\u7528 lambda \u8868\u8fbe\u5f0f\uff0c\u5c06\u5b57\u7b26\u4e32\u53c2\u6570\u4f20\u9012\u7ed9\u5b83\n    int number = stringToInt.apply(\"123\");\n\n    \/\/ \u8f93\u51fa\u8f6c\u6362\u540e\u7684\u6574\u6570\n    System.out.println(\"\u8f6c\u6362\u540e\u7684\u6570\u5b57\uff1a\" + number);\n  }\n}<\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c<code>stringToInt<\/code> lambda \u8868\u8fbe\u5f0f\u63a5\u53d7\u4e00\u4e2a String \u53c2\u6570\u5e76\u8fd4\u56de\u4e00\u4e2a Integer\u3002\u5f53\u8c03\u7528 <code>apply()<\/code> \u65b9\u6cd5\u65f6\uff0c\u4f1a\u5c06\u53c2\u6570 &#8220;123&#8221; \u4f20\u9012\u7ed9 lambda \u8868\u8fbe\u5f0f\uff0c\u5e76\u8fd4\u56de\u8f6c\u6362\u540e\u7684\u6574\u6570 123\u3002<\/p>\n<p><strong>\u7ed3\u8bba<\/strong><\/p>\n<p>lambda \u8868\u8fbe\u5f0f\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u6d01\u4e14\u5f3a\u5927\u7684\u65b9\u5f0f\u6765\u521b\u5efa\u53c2\u6570\u5316 Java \u51fd\u6570\u3002\u901a\u8fc7\u4f7f\u7528\u53c2\u6570\u5316 lambda \u8868\u8fbe\u5f0f\uff0c\u6211\u4eec\u53ef\u4ee5\u65b9\u4fbf\u5730\u521b\u5efa\u52a8\u6001\u51fd\u6570\uff0c\u8fd9\u4e9b\u51fd\u6570\u53ef\u4ee5\u6839\u636e\u4e0d\u540c\u7684\u53c2\u6570\u6267\u884c\u4e0d\u540c\u7684\u884c\u4e3a\u3002<\/p>\n<p>\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300alambda \u8868\u8fbe\u5f0f\u5982\u4f55\u521b\u5efa\u53c2\u6570\u5316 Java \u51fd\u6570\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>lambda \u8868\u8fbe\u5f0f\u5982\u4f55\u521b\u5efa\u53c2\u6570&#46;&#46;&#46;<\/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-203085","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203085","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=203085"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203085\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203085"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203085"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203085"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}