{"id":202801,"date":"2025-05-22T09:36:04","date_gmt":"2025-05-22T01:36:04","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202801\/"},"modified":"2025-05-22T09:36:04","modified_gmt":"2025-05-22T01:36:04","slug":"%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b%e5%9c%a8-java-%e4%b8%ad%e7%9a%84%e4%bc%98%e5%8a%bf%e4%b8%8e%e5%8a%a3%e5%8a%bf","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202801\/","title":{"rendered":"\u51fd\u6570\u5f0f\u7f16\u7a0b\u5728 Java \u4e2d\u7684\u4f18\u52bf\u4e0e\u52a3\u52bf"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u51fd\u6570\u5f0f\u7f16\u7a0b\u5728 Java \u4e2d\u7684\u4f18\u52bf\u4e0e\u52a3\u52bf<\/h1>\n<p>\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u8981\u52aa\u529b\uff0c\u4f46\u662f\u4e0d\u8981\u6025\uff01\u4eca\u5929\u7684\u8fd9\u7bc7\u6587\u7ae0<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u51fd\u6570\u5f0f\u7f16\u7a0b\u5728 Java \u4e2d\u7684\u4f18\u52bf\u4e0e\u52a3\u52bf\u300b<\/span>\u5c06\u4f1a\u4ecb\u7ecd\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u60f3\u6df1\u5165\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\uff0c\u53ef\u4ee5\u5173\u6ce8\u6211\uff01\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u6587\u7ae0\u7684\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u80fd\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u5728 Java \u4e2d\u7684\u4f18\u70b9\u5305\u62ec\u4e0d\u53ef\u53d8\u6027\u3001\u7eaf\u51fd\u6570\u548c\u4e00\u7b49\u51fd\u6570\uff0c\u6709\u52a9\u4e8e\u907f\u514d\u5e76\u53d1\u95ee\u9898\u3001\u63d0\u9ad8\u53ef\u6d4b\u8bd5\u6027\u3001\u521b\u5efa\u53ef\u91cd\u7528\u4ee3\u7801\u3002\u5176\u7f3a\u70b9\u5219\u5305\u62ec\u5b66\u4e60\u66f2\u7ebf\u9661\u5ced\u3001\u5bf9\u53ef\u53d8\u72b6\u6001\u5904\u7406\u4e0d\u591f\u7075\u6d3b\u3001\u53ef\u80fd\u964d\u4f4e\u6027\u80fd\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729943260671cd6dcbc9a0.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u51fd\u6570\u5f0f\u7f16\u7a0b\u5728 Java \u4e2d\u7684\u4f18\u52bf\u4e0e\u52a3\u52bf<\/strong><\/p>\n<p>\u51fd\u6570\u5f0f\u7f16\u7a0b (FP) \u662f\u4e00\u79cd\u7f16\u7a0b\u8303\u4f8b\uff0c\u5b83\u5f3a\u8c03\u4e0d\u53ef\u53d8\u6027\u3001\u7eaf\u51fd\u6570\u548c\u4e00\u7b49\u51fd\u6570\u3002\u4f7f\u7528 FP \u53ef\u4ee5\u5e26\u6765\u8bb8\u591a\u597d\u5904\uff0c\u5305\u62ec\uff1a<\/p>\n<p><strong>\u4f18\u52bf\uff1a<\/strong><\/p>\n<ul>\n<li><strong>\u4e0d\u53ef\u53d8\u6027\uff1a<\/strong> FP\u4e2d\u7684\u53d8\u91cf\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u8fd9\u6709\u52a9\u4e8e\u907f\u514d\u8bb8\u591a\u5e76\u53d1\u95ee\u9898\uff0c\u4f8b\u5982\u7ade\u6001\u6761\u4ef6\u3002<\/li>\n<li><strong>\u7eaf\u51fd\u6570\uff1a<\/strong> FP\u4e2d\u51fd\u6570\u7684\u8f93\u51fa\u4ec5\u5bf9\u51fd\u6570\u7684\u53c2\u6570\u548c\u51fd\u6570\u81ea\u8eab\u72b6\u6001\uff08\u5982\u679c\u6ca1\u6709\uff09\u6709\u786e\u5b9a\u7684\u4f9d\u8d56\u5173\u7cfb\u3002\u8fd9\u6709\u52a9\u4e8e\u4ee3\u7801\u7684\u53ef\u9884\u6d4b\u6027\u548c\u53ef\u6d4b\u8bd5\u6027\u3002<\/li>\n<li><strong>\u4e00\u7b49\u51fd\u6570\uff1a<\/strong> FP\u4e2d\u7684\u51fd\u6570\u53ef\u4ee5\u50cf\u503c\u4e00\u6837\u4f20\u9012\uff0c\u5141\u8bb8\u521b\u5efa\u66f4\u7075\u6d3b\u3001\u66f4\u53ef\u91cd\u7528\u7684\u4ee3\u7801\u3002<\/li>\n<\/ul>\n<p><strong>\u52a3\u52bf\uff1a<\/strong><\/p>\n<ul>\n<li><strong>\u5b66\u4e60\u66f2\u7ebf\uff1a<\/strong> FP\u5bf9\u4e8e\u4e60\u60ef\u4e8e\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b (OOP) \u7684\u7a0b\u5e8f\u5458\u6765\u8bf4\u53ef\u80fd\u9700\u8981\u4e00\u6bb5\u65f6\u95f4\u624d\u80fd\u9002\u5e94\u3002<\/li>\n<li><strong>\u53ef\u53d8\u72b6\u6001\uff1a<\/strong> \u5728\u9700\u8981\u53ef\u53d8\u72b6\u6001\u7684\u60c5\u51b5\u4e0b\uff0cFP\u53ef\u80fd\u4e0d\u5982 OOP \u7075\u6d3b\u3002<\/li>\n<li><strong>\u6027\u80fd\u95ee\u9898\uff1a<\/strong> \u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0cFP\u7684\u5f00\u9500\u53ef\u80fd\u4f1a\u964d\u4f4e\u5e94\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u3002<\/li>\n<\/ul>\n<p><strong>\u5b9e\u6218\u6848\u4f8b\uff1a<\/strong><\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5728 Java \u4e2d\u4f7f\u7528 FP \u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n<pre>import java.util.List;\n\npublic class FunctionProgrammingExamples {\n\n    public static void main(String[] args) {\n        List&lt;Integer&gt; numbers = List.of(1, 2, 3, 4, 5);\n\n        \/\/ \u627e\u51fa\u5947\u6570\uff08\u4f7f\u7528 Java 8+ \u7684 Lambda \u8868\u8fbe\u5f0f\uff09\uff1a\n        List&lt;Integer&gt; oddNumbers = numbers.stream().filter(n -&gt; n % 2 != 0).toList();\n        System.out.println(oddNumbers); \/\/ \u8f93\u51fa\uff1a[1, 3, 5]\n\n        \/\/ \u5bf9\u5217\u8868\u4e2d\u7684\u6570\u5b57\u6c42\u548c\uff08\u4f7f\u7528\u65b9\u6cd5\u5f15\u7528\uff09\uff1a\n        int sum = numbers.stream().reduce(0, (a, b) -&gt; a + b);\n        System.out.println(sum); \/\/ \u8f93\u51fa\uff1a15\n\n        \/\/ \u5c06\u6570\u5b57\u6620\u5c04\u5230\u5176\u5e73\u65b9\uff08\u4f7f\u7528 map \u51fd\u6570\uff09\uff1a\n        List&lt;Integer&gt; squares = numbers.stream().map(n -&gt; n * n).toList();\n        System.out.println(squares); \/\/ \u8f93\u51fa\uff1a[1, 4, 9, 16, 25]\n    }\n}<\/pre>\n<p>\u4ee5\u4e0a\u793a\u4f8b\u6f14\u793a\u4e86 FP \u7684\u4e00\u4e9b\u5173\u952e\u539f\u5219\uff0c\u5982\u4e0d\u53ef\u53d8\u6027\uff08\u5217\u8868\u662f\u4e0d\u53ef\u53d8\u7684\uff09\u3001\u7eaf\u51fd\u6570\uff08<code>filter<\/code> \u548c <code>map<\/code> \u51fd\u6570\u7684\u8f93\u51fa\u53ea\u53d6\u51b3\u4e8e\u5176\u53c2\u6570\uff09\u3002<\/p>\n<p>\u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300a\u51fd\u6570\u5f0f\u7f16\u7a0b\u5728 Java \u4e2d\u7684\u4f18\u52bf\u4e0e\u52a3\u52bf\u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03\u6587\u7ae0\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u5728 Java \u4e2d\u7684\u4f18\u52bf&#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-202801","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202801","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=202801"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202801\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202801"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202801"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202801"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}