{"id":202756,"date":"2025-05-22T10:11:40","date_gmt":"2025-05-22T02:11:40","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202756\/"},"modified":"2025-05-22T10:11:40","modified_gmt":"2025-05-22T02:11:40","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8-java-%e4%b8%ad%e9%81%bf%e5%85%8d%e6%8d%95%e8%8e%b7%e5%bc%82%e5%b8%b8%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202756\/","title":{"rendered":"\u5982\u4f55\u5728 Java \u4e2d\u907f\u514d\u6355\u83b7\u5f02\u5e38\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u5982\u4f55\u5728 Java \u4e2d\u907f\u514d\u6355\u83b7\u5f02\u5e38\uff1f<\/h1>\n<p>\u201c\u7eb5\u6709\u75be\u98ce\u6765\uff0c\u4eba\u751f\u4e0d\u8a00\u5f03\u201d\uff0c\u8fd9\u53e5\u8bdd\u9001\u7ed9\u6b63\u5728\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u7684\u670b\u53cb\u4eec\uff0c\u4e5f\u5e0c\u671b\u5728\u9605\u8bfb\u672c\u6587<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u5982\u4f55\u5728 Java \u4e2d\u907f\u514d\u6355\u83b7\u5f02\u5e38\uff1f\u300b<\/span>\u540e\uff0c\u80fd\u591f\u771f\u7684\u5e2e\u52a9\u5230\u5927\u5bb6\u3002\u6211\u4e5f\u4f1a\u5728\u540e\u7eed\u7684\u6587\u7ae0\u4e2d\uff0c\u9646\u7eed\u66f4\u65b0<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u76f8\u5173\u7684\u6280\u672f\u6587\u7ae0\uff0c\u6709\u597d\u7684\u5efa\u8bae\u6b22\u8fce\u5927\u5bb6\u5728\u8bc4\u8bba\u7559\u8a00\uff0c\u975e\u5e38\u611f\u8c22\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729939052671cc66cc62a7.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u5982\u4f55\u907f\u514d\u6355\u83b7\u5f02\u5e38<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u5f02\u5e38\u5904\u7406\u662f\u5904\u7406\u610f\u5916\u4e8b\u4ef6\u7684\u91cd\u8981\u673a\u5236\u3002\u7136\u800c\uff0c\u8fc7\u5ea6\u4f7f\u7528\u5f02\u5e38\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4ee3\u7801\u96be\u4ee5\u7ef4\u62a4\u548c\u6027\u80fd\u4e0d\u4f73\u3002\u56e0\u6b64\uff0c\u6709\u65f6\u9700\u8981\u8003\u8651\u907f\u514d\u6355\u83b7\u5f02\u5e38\u3002<\/p>\n<p><strong>\u907f\u514d\u6355\u83b7\u5f02\u5e38\u7684\u65b9\u6cd5<\/strong><\/p>\n<ul>\n<li><strong>\u5904\u7406\u6839\u672c\u539f\u56e0\uff1a<\/strong>\u4e0e\u5176\u6355\u83b7\u5e76\u5904\u7406\u5f02\u5e38\uff0c\u4e0d\u5982\u5c1d\u8bd5\u5904\u7406\u6839\u672c\u539f\u56e0\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4e00\u4e2a\u65b9\u6cd5\u629b\u51fa NullPointerException\uff0c\u53ef\u4ee5\u8003\u8651\u6dfb\u52a0\u7a7a\u68c0\u67e5\u6765\u9632\u6b62\u7a7a\u5f15\u7528\u3002<\/li>\n<li><strong>\u4f7f\u7528 Optional\uff1a<\/strong> Optional \u7c7b\u53ef\u4ee5\u8868\u793a\u53ef\u80fd\u7f3a\u5931\u7684\u503c\u3002\u901a\u8fc7\u4f7f\u7528 Optional\uff0c\u53ef\u4ee5\u907f\u514d\u6355\u83b7 NullPointerException\u3002<\/li>\n<li><strong>\u4f7f\u7528\u65ad\u8a00\uff1a<\/strong> \u65ad\u8a00\u53ef\u4ee5\u68c0\u67e5\u7a0b\u5e8f\u7684\u9884\u5148\u6761\u4ef6\u548c\u540e\u7f6e\u6761\u4ef6\u3002\u5982\u679c\u65ad\u8a00\u5931\u8d25\uff0c\u5b83\u4f1a\u629b\u51fa\u4e00\u4e2a AssertionError\uff0c\u53ef\u4ee5\u7528\u6765\u6307\u793a\u95ee\u9898\u3002<\/li>\n<li><strong>\u4f7f\u7528\u5f02\u5e38\u4f20\u9012\uff1a<\/strong>\u6709\u65f6\uff0c\u4e0d\u9700\u8981\u5904\u7406\u5f02\u5e38\uff0c\u4f46\u53c8\u60f3\u901a\u77e5\u8c03\u7528\u8005\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u5c06\u5f02\u5e38\u4f20\u9012\u7ed9\u4e0a\u5c42\u65b9\u6cd5\u8fdb\u884c\u5904\u7406\u3002<\/li>\n<\/ul>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u5047\u8bbe\u6709\u4e00\u4e2a\u65b9\u6cd5 <code>calculateAverage<\/code>\uff0c\u5b83\u63a5\u53d7\u4e00\u4e2a\u6574\u6570\u6570\u7ec4\u5e76\u8ba1\u7b97\u5176\u5e73\u5747\u503c\u3002\u5982\u679c\u6570\u7ec4\u4e3a\u7a7a\uff0c\u5b83\u5e94\u8be5\u629b\u51fa\u4e00\u4e2a IllegalArgumentException\u3002<\/p>\n<p><strong>\u4f7f\u7528\u6355\u83b7\u5f02\u5e38\u7684\u4ee3\u7801\uff1a<\/strong><\/p>\n<pre>public double calculateAverage(int[] numbers) {\n    try {\n        if (numbers.length == 0) {\n            throw new IllegalArgumentException(\"Array cannot be empty.\");\n        }\n\n        double average = 0;\n        for (int number : numbers) {\n            average += number;\n        }\n        return average \/ numbers.length;\n    } catch (IllegalArgumentException e) {\n        e.printStackTrace();  \/\/ \u65e5\u5fd7\u8bb0\u5f55\u6216\u5904\u7406\u5f02\u5e38\n        return 0;\n    }\n}<\/pre>\n<p><strong>\u907f\u514d\u6355\u83b7\u5f02\u5e38\u7684\u4ee3\u7801\uff1a<\/strong><\/p>\n<pre>public double calculateAverage(int[] numbers) {\n    if (numbers.length == 0) {\n        throw new IllegalArgumentException(\"Array cannot be empty.\");\n    }\n\n    double average = 0;\n    for (int number : numbers) {\n        average += number;\n    }\n    return average \/ numbers.length;\n}<\/pre>\n<p>\u907f\u514d\u5f02\u5e38\u6355\u83b7\u4ee3\u7801\u66f4\u7b80\u6d01\uff0c\u5e76\u4e14\u4e5f\u8ba9\u5f02\u5e38\u5904\u7406\u7684\u8d23\u4efb\u66f4\u660e\u786e\u3002<\/p>\n<p>\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300a\u5982\u4f55\u5728 Java \u4e2d\u907f\u514d\u6355\u83b7\u5f02\u5e38\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>\u5982\u4f55\u5728 Java \u4e2d\u907f\u514d\u6355\u83b7\u5f02\u5e38&#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-202756","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202756","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=202756"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202756\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202756"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202756"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202756"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}