{"id":202943,"date":"2025-05-22T10:54:50","date_gmt":"2025-05-22T02:54:50","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202943\/"},"modified":"2025-05-22T10:54:50","modified_gmt":"2025-05-22T02:54:50","slug":"java%e5%87%bd%e6%95%b0%e5%bc%8f%e9%80%92%e5%bd%92%e5%a6%82%e4%bd%95%e4%b8%8ejava%e6%b5%81%e5%bc%8f%e7%bc%96%e7%a8%8b%e7%9b%b8%e7%bb%93%e5%90%88%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202943\/","title":{"rendered":"Java\u51fd\u6570\u5f0f\u9012\u5f52\u5982\u4f55\u4e0eJava\u6d41\u5f0f\u7f16\u7a0b\u76f8\u7ed3\u5408\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java\u51fd\u6570\u5f0f\u9012\u5f52\u5982\u4f55\u4e0eJava\u6d41\u5f0f\u7f16\u7a0b\u76f8\u7ed3\u5408\uff1f<\/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\u51fd\u6570\u5f0f\u9012\u5f52\u5982\u4f55\u4e0eJava\u6d41\u5f0f\u7f16\u7a0b\u76f8\u7ed3\u5408\uff1f\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>\u51fd\u6570\u5f0f\u9012\u5f52\u4e0e\u6d41\u5f0f\u7f16\u7a0b\u7ed3\u5408\u7684\u4f18\u52bf\u5728\u4e8e\u5c06\u9012\u5f52\u7684\u4f18\u52bf\u4e0e\u6d41\u5f0f\u7f16\u7a0b\u7684\u7b80\u6d01\u6027\u76f8\u7ed3\u5408\u3002\u4e3e\u4f8b\u800c\u8a00\uff0c\u8ba1\u7b97\u6590\u6ce2\u7eb3\u5951\u6570\u5217\u524d n \u9879\u4e4b\u548c\uff0c\u51fd\u6570\u5f0f\u9012\u5f52\u89e3\u51b3\u65b9\u6848\u662f\u4f7f\u7528\u9012\u5f52\u6765\u6c42\u89e3\u6bcf\u4e00\u9879\uff0c\u800c\u6d41\u5f0f\u7f16\u7a0b\u89e3\u51b3\u65b9\u6848\u5219\u662f\u4f7f\u7528\u6d41\u5f0f\u64cd\u4f5c\u8fdb\u884c\u5e76\u884c\u8ba1\u7b97\uff0c\u66f4\u7b80\u6d01\u3001\u53ef\u7ec4\u5408\u3002\u6d41\u5f0f\u7f16\u7a0b\u7684\u4f18\u52bf\u8fd8\u5305\u62ec\u5e76\u884c\u6027\u3001\u5ef6\u8fdf\u6c42\u503c\u548c\u53ef\u7ec4\u5408\u6027\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241027\/1730002477671dbe2d89a6c.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Java\u51fd\u6570\u5f0f\u9012\u5f52\u4e0e\u6d41\u5f0f\u7f16\u7a0b\u7684\u7ed3\u5408<\/strong><\/p>\n<p><strong>\u7b80\u4ecb<\/strong><\/p>\n<p>Java\u51fd\u6570\u5f0f\u9012\u5f52\u662f\u4e00\u79cd\u7f16\u7a0b\u8303\u5f0f\uff0c\u53ef\u4ee5\u5c06\u95ee\u9898\u5206\u89e3\u6210\u66f4\u5c0f\u7684\u5b50\u95ee\u9898\uff0c\u7136\u540e\u9012\u5f52\u5730\u6c42\u89e3\u8fd9\u4e9b\u5b50\u95ee\u9898\u3002\u800cJava\u6d41\u5f0f\u7f16\u7a0b\u662f\u4e00\u79cd\u5bf9\u96c6\u5408\u8fdb\u884c\u6d41\u6c34\u7ebf\u64cd\u4f5c\u7684\u9ad8\u7ea7\u6280\u672f\u3002<\/p>\n<p>\u51fd\u6570\u5f0f\u9012\u5f52\u4e0e\u6d41\u5f0f\u7f16\u7a0b\u7684\u7ed3\u5408\u5177\u6709\u5f3a\u5927\u7684\u4f18\u52bf\uff0c\u56e0\u4e3a\u5b83\u5141\u8bb8\u5c06\u9012\u5f52\u7684\u4f18\u52bf\u4e0e\u6d41\u5f0f\u7f16\u7a0b\u7684\u7b80\u6d01\u6027\u76f8\u7ed3\u5408\u3002<\/p>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u8003\u8651\u8fd9\u6837\u4e00\u4e2a\u95ee\u9898\uff1a\u8ba1\u7b97\u6590\u6ce2\u7eb3\u5951\u6570\u5217\u7684\u524dn\u9879\u4e4b\u548c\u3002\u6590\u6ce2\u7eb3\u5951\u6570\u5217\u662f\u4e00\u4e2a\u7279\u6b8a\u7684\u6570\u5217\uff0c\u5176\u4e2d\u6bcf\u4e2a\u6570\u5b57\u90fd\u662f\u524d\u4e24\u4e2a\u6570\u5b57\u4e4b\u548c\u3002<\/p>\n<p><strong>\u4f7f\u7528\u51fd\u6570\u5f0f\u9012\u5f52\u7684\u89e3\u51b3\u65b9\u6848<\/strong><\/p>\n<pre>import java.util.stream.IntStream;\n\nclass Fibonacci {\n\n    public static int fibSum(int n) {\n        if (n &lt;= 1) {\n            return n;\n        } else {\n            return fibSum(n - 1) + fibSum(n - 2);\n        }\n    }\n\n    \/\/ \u4f7f\u7528\u6d41\u5f0f\u7f16\u7a0b\u8ba1\u7b97\u6590\u6ce2\u7eb3\u5951\u6570\u5217\u7684\u548c\n    public static int fibSumStream(int n) {\n        return IntStream.range(0, n)\n                .map(Fibonacci::fib)\n                .reduce((a, b) -&gt; a + b)\n                .orElse(0);\n    }\n\n    private static int fib(int n) {\n        if (n &lt;= 1) {\n            return n;\n        } else {\n            return fib(n - 1) + fib(n - 2);\n        }\n    }\n\n    public static void main(String[] args) {\n        System.out.println(fibSum(5)); \/\/ \u8f93\u51fa\uff1a12\n        System.out.println(fibSumStream(5)); \/\/ \u8f93\u51fa\uff1a12\n    }\n}<\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c<code>fibSum<\/code>\u65b9\u6cd5\u4f7f\u7528\u51fd\u6570\u5f0f\u9012\u5f52\u8ba1\u7b97\u6590\u6ce2\u7eb3\u5951\u6570\u5217\u7684\u524dn\u9879\u4e4b\u548c\uff0c\u800c<code>fibSumStream<\/code>\u65b9\u6cd5\u4f7f\u7528\u6d41\u5f0f\u7f16\u7a0b\u5b9e\u73b0\u76f8\u540c\u7684\u903b\u8f91\u3002<\/p>\n<p>\u6d41\u5f0f\u7f16\u7a0b\u89e3\u51b3\u65b9\u6848\u4f7f\u7528<code>IntStream.range(0, n)<\/code>\u521b\u5efa\u4e00\u4e2a0\u5230n-1\u7684\u6574\u6570\u6d41\u3002\u7136\u540e\uff0c\u4f7f\u7528<code>map<\/code>\u65b9\u6cd5\u5c06\u6d41\u4e2d\u7684\u6bcf\u4e2a\u6574\u6570\u6620\u5c04\u5230\u5bf9\u5e94\u7684\u6590\u6ce2\u7eb3\u5951\u6570\u3002\u6700\u540e\uff0c\u4f7f\u7528<code>reduce<\/code>\u65b9\u6cd5\u5c06\u6d41\u4e2d\u7684\u6240\u6709\u6590\u6ce2\u7eb3\u5951\u6570\u6c42\u548c\u3002<\/p>\n<p><strong>\u6bd4\u8f83<\/strong><\/p>\n<p>\u4e24\u79cd\u89e3\u51b3\u65b9\u6848\u90fd\u8fd4\u56de\u4e86\u76f8\u540c\u7684\u6b63\u786e\u7b54\u6848\u3002\u4f46\u662f\uff0c\u6d41\u5f0f\u7f16\u7a0b\u89e3\u51b3\u65b9\u6848\u66f4\u7b80\u6d01\u3001\u66f4\u6613\u4e8e\u9605\u8bfb\u3002\u6b64\u5916\uff0c\u6d41\u5f0f\u7f16\u7a0b\u89e3\u51b3\u65b9\u6848\u8fd8\u5177\u6709\u4ee5\u4e0b\u4f18\u52bf\uff1a<\/p>\n<ul>\n<li><strong>\u5e76\u884c\u6027\uff1a<\/strong>\u6d41\u5f0f\u64cd\u4f5c\u53ef\u4ee5\u5e76\u884c\u6267\u884c\uff0c\u4ee5\u63d0\u9ad8\u8ba1\u7b97\u6027\u80fd\u3002<\/li>\n<li><strong>\u5ef6\u8fdf\u6c42\u503c\uff1a<\/strong>\u6d41\u5f0f\u64cd\u4f5c\u76f4\u5230\u9700\u8981\u65f6\u624d\u6267\u884c\uff0c\u4ece\u800c\u53ef\u4ee5\u8282\u7701\u5185\u5b58\u3002<\/li>\n<li><strong>\u53ef\u7ec4\u5408\u6027\uff1a<\/strong>\u6d41\u5f0f\u64cd\u4f5c\u53ef\u4ee5\u8f7b\u677e\u7ec4\u5408\u5728\u4e00\u8d77\u4ee5\u521b\u5efa\u590d\u6742\u7684\u6570\u636e\u5904\u7406\u7ba1\u9053\u3002<\/li>\n<\/ul>\n<p>\u4eca\u5929\u5173\u4e8e\u300aJava\u51fd\u6570\u5f0f\u9012\u5f52\u5982\u4f55\u4e0eJava\u6d41\u5f0f\u7f16\u7a0b\u76f8\u7ed3\u5408\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,\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u51fd\u6570\u5f0f\u9012\u5f52\u5982\u4f55\u4e0eJava&#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-202943","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202943","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=202943"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202943\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202943"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202943"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202943"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}