{"id":202813,"date":"2025-05-22T10:45:23","date_gmt":"2025-05-22T02:45:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202813\/"},"modified":"2025-05-22T10:45:23","modified_gmt":"2025-05-22T02:45:23","slug":"java-%e4%b8%ad%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b%e8%8c%83%e5%bc%8f%e5%af%b9%e6%80%a7%e8%83%bd%e7%9a%84%e5%bd%b1%e5%93%8d","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202813\/","title":{"rendered":"Java \u4e2d\u51fd\u6570\u5f0f\u7f16\u7a0b\u8303\u5f0f\u5bf9\u6027\u80fd\u7684\u5f71\u54cd"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java \u4e2d\u51fd\u6570\u5f0f\u7f16\u7a0b\u8303\u5f0f\u5bf9\u6027\u80fd\u7684\u5f71\u54cd<\/h1>\n<p>\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u662f\u7ed3\u5408\u6211\u4e4b\u524d\u9762\u8bd5\u7684\u5404\u79cd\u7ecf\u5386\u548c\u5b9e\u6218\u5f00\u53d1\u4e2d\u9047\u5230\u7684\u95ee\u9898\u89e3\u51b3\u7ecf\u9a8c\u6574\u7406\u7684\uff0c\u5e0c\u671b\u8fd9\u7bc7\u300aJava \u4e2d\u51fd\u6570\u5f0f\u7f16\u7a0b\u8303\u5f0f\u5bf9\u6027\u80fd\u7684\u5f71\u54cd\u300b\u5bf9\u4f60\u6709\u5f88\u5927\u5e2e\u52a9\uff01\u6b22\u8fce\u6536\u85cf\uff0c\u5206\u4eab\u7ed9\u66f4\u591a\u7684\u9700\u8981\u7684\u670b\u53cb\u5b66\u4e60~<\/p>\n<p>Java \u4e2d\u51fd\u6570\u5f0f\u7f16\u7a0b (FP) \u5bf9\u6027\u80fd\u7684\u5f71\u54cd\uff1a\u4f18\u52bf\uff1a\u63d0\u9ad8\u5e76\u884c\u6027\uff0c\u5229\u7528\u591a\u6838\u5904\u7406\u5668\u4f18\u5316\u7f13\u5b58\u547d\u4e2d\u7387\uff0c\u51cf\u5c11\u5185\u5b58\u8bbf\u95ee\u65f6\u95f4\u52a0\u5feb\u5783\u573e\u56de\u6536\uff0c\u51cf\u5c11\u6682\u505c\u65f6\u95f4\u52a3\u52bf\uff1a\u7c7b\u578b\u64e6\u9664\u5f71\u54cd\u6cdb\u578b\u6570\u636e\u7ed3\u6784\u7684\u6027\u80fd\u51fd\u6570\u8c03\u7528\u5f00\u9500\u8fc7\u5ea6\u5bf9\u8c61\u5206\u914d\uff0c\u4ea7\u751f\u8d1f\u9762\u5f71\u54cd\u6839\u636e\u5177\u4f53\u5e94\u7528\u7279\u6027\u6743\u8861\u6536\u76ca\u548c\u7f3a\u70b9\uff0c\u4f7f\u7528 FP \u65f6\u9700\u4ed4\u7ec6\u8003\u8651\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729944874671cdd2a1ac06.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Java \u4e2d\u51fd\u6570\u5f0f\u7f16\u7a0b\u8303\u5f0f\u5bf9\u6027\u80fd\u7684\u5f71\u54cd<\/strong><\/p>\n<p>\u51fd\u6570\u5f0f\u7f16\u7a0b (FP) \u8303\u5f0f\u5728 Java \u4e2d\u8d8a\u6765\u8d8a\u6d41\u884c\uff0c\u56e0\u4e3a\u5b83\u63d0\u4f9b\u4e86\u7f16\u5199\u66f4\u7b80\u6d01\u3001\u66f4\u53ef\u7ef4\u62a4\u7684\u4ee3\u7801\u7684\u673a\u4f1a\u3002\u7136\u800c\uff0c\u5bf9\u4e8e\u5176\u5bf9\u6027\u80fd\u7684\u5f71\u54cd\uff0c\u5b58\u5728\u4e00\u4e9b\u56f0\u60d1\u3002<\/p>\n<p><strong>\u57fa\u672c\u6982\u5ff5<\/strong><\/p>\n<p>FP \u8303\u5f0f\u5f3a\u8c03\u51fd\u6570\u5f0f\u8fd0\u7b97\uff0c\u5176\u4e2d\u51fd\u6570\u53ea\u4f9d\u8d56\u4e8e\u5176\u8f93\u5165\uff0c\u800c\u4e0d\u4f1a\u6539\u53d8\u5176\u5468\u56f4\u7684\u72b6\u6001\u3002\u8fd9\u79cd\u65b9\u6cd5\u53ef\u4ee5\u63d0\u9ad8\u5e76\u884c\u6027\u548c\u53ef\u7ec4\u5408\u6027\u3002<\/p>\n<p><strong>\u4f18\u52bf<\/strong><\/p>\n<p>FP \u5728\u63d0\u9ad8\u6027\u80fd\u65b9\u9762\u6709\u4e00\u4e9b\u6f5c\u5728\u4f18\u52bf\uff1a<\/p>\n<ul>\n<li><strong>\u5e76\u884c\u6027\uff1a<\/strong> \u7531\u4e8e FP \u51fd\u6570\u6ca1\u6709\u526f\u4f5c\u7528\uff0c\u5b83\u4eec\u53ef\u4ee5\u5b89\u5168\u5730\u5e76\u884c\u6267\u884c\u3002\u8fd9\u5728\u591a\u6838\u5904\u7406\u5668\u4e0a\u53ef\u4ee5\u5e26\u6765\u663e\u8457\u7684\u6027\u80fd\u63d0\u5347\u3002<\/li>\n<li><strong>\u7f13\u5b58\u4f18\u5316\uff1a<\/strong> FP \u4ee3\u7801\u901a\u5e38\u521b\u5efa\u4e0d\u53ef\u53d8\u5bf9\u8c61\uff0c\u8fd9\u53ef\u4ee5\u63d0\u9ad8\u7f13\u5b58\u547d\u4e2d\u7387\uff0c\u4ece\u800c\u51cf\u5c11\u5185\u5b58\u8bbf\u95ee\u65f6\u95f4\u3002<\/li>\n<li><strong>\u5783\u573e\u56de\u6536\uff1a<\/strong> \u4e0d\u53ef\u53d8\u5bf9\u8c61\u53ef\u4ee5\u66f4\u5feb\u5730\u88ab\u5783\u573e\u56de\u6536\uff0c\u8fd9\u53ef\u4ee5\u51cf\u5c11\u5783\u573e\u56de\u6536\u6682\u505c\u65f6\u95f4\u3002<\/li>\n<\/ul>\n<p><strong>\u52a3\u52bf<\/strong><\/p>\n<p>\u5c3d\u7ba1\u6709\u8fd9\u4e9b\u4f18\u52bf\uff0cFP \u5728\u6027\u80fd\u65b9\u9762\u4e5f\u5b58\u5728\u4e00\u4e9b\u6f5c\u5728\u52a3\u52bf\uff1a<\/p>\n<ul>\n<li><strong>\u7c7b\u578b\u64e6\u9664\uff1a<\/strong> Java \u4e2d\u7684\u7c7b\u578b\u64e6\u9664\u4f1a\u7834\u574f\u6cdb\u578b\u6570\u636e\u7ed3\u6784\u7684\u6027\u80fd\uff0c\u7279\u522b\u662f\u5f53\u4f7f\u7528\u6d41\u5f0f API \u65f6\u3002<\/li>\n<li><strong>\u51fd\u6570\u8c03\u7528\u7684\u5f00\u9500\uff1a<\/strong> FP \u4ee3\u7801\u901a\u5e38\u6d89\u53ca\u5927\u91cf\u7684\u51fd\u6570\u8c03\u7528\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u4e00\u4e9b\u5f00\u9500\u3002<\/li>\n<li><strong>\u8fc7\u5ea6\u7684\u5bf9\u8c61\u5206\u914d\uff1a<\/strong> \u521b\u5efa\u4e0d\u53ef\u53d8\u5bf9\u8c61\u9700\u8981\u5206\u914d\u65b0\u7684\u5185\u5b58\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8fd9\u4f1a\u5bf9\u6027\u80fd\u4ea7\u751f\u8d1f\u9762\u5f71\u54cd\u3002<\/li>\n<\/ul>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u4e3a\u4e86\u8bf4\u660e FP \u7684\u6027\u80fd\u5f71\u54cd\uff0c\u6211\u4eec\u8fdb\u884c\u4ee5\u4e0b\u6bd4\u8f83\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528\u4f20\u7edf\u7684\u547d\u4ee4\u5f0f\u8303\u5f0f\u5b9e\u73b0\u6d41\u5f0f\u5904\u7406<\/li>\n<li>\u4f7f\u7528 FP \u8303\u5f0f\u548c Java 8 Stream API \u5b9e\u73b0\u6d41\u5f0f\u5904\u7406<\/li>\n<\/ul>\n<p><strong>\u4ee3\u7801\u793a\u4f8b<\/strong><\/p>\n<p><strong>\u547d\u4ee4\u5f0f<\/strong><\/p>\n<pre>List&lt;Integer&gt; numbers = ...;\nList&lt;Integer&gt; squares = new ArrayList&lt;&gt;();\nfor (int number : numbers) {\n    squares.add(number * number);\n}<\/pre>\n<p><strong>\u51fd\u6570\u5f0f<\/strong><\/p>\n<pre>List&lt;Integer&gt; numbers = ...;\nList&lt;Integer&gt; squares = numbers.stream()\n    .map(number -&gt; number * number)\n    .collect(Collectors.toList());<\/pre>\n<p><strong>\u7ed3\u679c<\/strong><\/p>\n<p>\u5728\u5177\u6709\u5927\u91cf\u6570\u636e\u7684\u6570\u636e\u96c6\u4e0a\uff0c\u51fd\u6570\u5f0f\u5b9e\u73b0\u7684\u6027\u80fd\u663e\u7740\u4f18\u4e8e\u547d\u4ee4\u5f0f\u5b9e\u73b0\uff0c\u53d7\u76ca\u4e8e\u5e76\u884c\u6027\u548c\u7f13\u5b58\u4f18\u5316\u3002\u7136\u800c\uff0c\u5728\u5c0f\u6570\u636e\u96c6\u4e0a\uff0c\u547d\u4ee4\u5f0f\u5b9e\u73b0\u7684\u6027\u80fd\u53ef\u80fd\u66f4\u597d\uff0c\u56e0\u4e3a\u5b83\u907f\u514d\u4e86\u51fd\u6570\u8c03\u7528\u7684\u5f00\u9500\u3002<\/p>\n<p><strong>\u7ed3\u8bba<\/strong><\/p>\n<p>FP \u8303\u5f0f\u5728 Java \u4e2d\u786e\u5b9e\u5177\u6709\u6027\u80fd\u5f71\u54cd\u3002\u867d\u7136\u5b83\u63d0\u4f9b\u4e86\u5e76\u884c\u6027\u548c\u7f13\u5b58\u4f18\u5316\u7b49\u597d\u5904\uff0c\u4f46\u5b83\u4e5f\u5f15\u5165\u4e86\u4e00\u4e9b\u6027\u80fd\u5f00\u9500\u3002\u6839\u636e\u5177\u4f53\u5e94\u7528\u7a0b\u5e8f\u7684\u7279\u5f81\uff0c\u4f7f\u7528 FP \u65f6\u9700\u8981\u6743\u8861\u597d\u5904\u548c\u7f3a\u70b9\u3002<\/p>\n<p>\u4eca\u5929\u5173\u4e8e\u300aJava \u4e2d\u51fd\u6570\u5f0f\u7f16\u7a0b\u8303\u5f0f\u5bf9\u6027\u80fd\u7684\u5f71\u54cd\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java \u4e2d\u51fd\u6570\u5f0f\u7f16\u7a0b\u8303\u5f0f\u5bf9\u6027\u80fd&#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-202813","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202813","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=202813"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202813\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202813"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202813"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202813"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}