{"id":38191,"date":"2024-11-26T16:33:13","date_gmt":"2024-11-26T08:33:13","guid":{"rendered":"https:\/\/fwq.ai\/blog\/38191\/"},"modified":"2024-11-26T16:33:13","modified_gmt":"2024-11-26T08:33:13","slug":"java%e6%80%8e%e4%b9%88%e5%88%9b%e5%bb%ba%e7%b1%bb%e7%9a%84%e5%af%b9%e8%b1%a1%e6%95%b0%e7%bb%84","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/38191\/","title":{"rendered":"java\u600e\u4e48\u521b\u5efa\u7c7b\u7684\u5bf9\u8c61\u6570\u7ec4"},"content":{"rendered":"<blockquote><p>\n  \u5728 java \u4e2d\uff0c\u4f7f\u7528 new \u64cd\u4f5c\u7b26\u521b\u5efa\u7c7b\u5bf9\u8c61\u6570\u7ec4\u7684\u6b65\u9aa4\u5982\u4e0b\uff1a\u6307\u5b9a\u8981\u521b\u5efa\u5bf9\u8c61\u6570\u7ec4\u7684\u7c7b\u7684\u540d\u79f0\u3002\u58f0\u660e\u5bf9\u8c61\u6570\u7ec4\u7684\u540d\u79f0\u3002\u4f7f\u7528 new \u64cd\u4f5c\u7b26\u521b\u5efa\u6307\u5b9a\u5927\u5c0f\u7684\u5bf9\u8c61\u6570\u7ec4\u3002\u4f7f\u7528\u6570\u7ec4\u7d22\u5f15\u8bbf\u95ee\u548c\u64cd\u4f5c\u6570\u7ec4\u4e2d\u7684\u5bf9\u8c61\u3002\u5728\u4f7f\u7528\u6570\u7ec4\u4e2d\u7684\u5bf9\u8c61\u4e4b\u524d\uff0c\u9700\u8981\u5148\u521b\u5efa\u8fd9\u4e9b\u5bf9\u8c61\u5e76\u5c06\u5176\u5206\u914d\u7ed9\u6570\u7ec4\u5143\u7d20\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/14\/2024111410271637634.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u521b\u5efa\u7c7b\u7684\u5bf9\u8c61\u6570\u7ec4\u63d2\u56fe\" alt=\"java\u600e\u4e48\u521b\u5efa\u7c7b\u7684\u5bf9\u8c61\u6570\u7ec4\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u4f7f\u7528 Java \u521b\u5efa\u7c7b\u7684\u5bf9\u8c61\u6570\u7ec4<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 new \u64cd\u4f5c\u7b26\u521b\u5efa\u4e00\u4e2a\u7c7b\u7684\u5bf9\u8c61\u6570\u7ec4\u3002\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n<pre>ClassName[] arrayName = new ClassName[size];<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5176\u4e2d\uff1a<\/p>\n<ul>\n<li>ClassName \u662f\u8981\u521b\u5efa\u5bf9\u8c61\u6570\u7ec4\u7684\u7c7b\u7684\u540d\u79f0\u3002<\/li>\n<li>arrayName \u662f\u5bf9\u8c61\u6570\u7ec4\u7684\u540d\u79f0\u3002<\/li>\n<li>size \u662f\u6570\u7ec4\u7684\u5927\u5c0f\uff0c\u5373\u6570\u7ec4\u53ef\u4ee5\u5bb9\u7eb3\u7684\u5bf9\u8c61\u6570\u91cf\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u8981\u521b\u5efa\u4e00\u4e2a\u5305\u542b 5 \u4e2a Person \u5bf9\u8c61\u7684\u6570\u7ec4\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>Person[] people = new Person[5];<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u73b0\u5728\uff0cpeople \u6570\u7ec4\u5df2\u7ecf\u521b\u5efa\u597d\u4e86\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u6570\u7ec4\u7d22\u5f15\u6765\u8bbf\u95ee\u548c\u64cd\u4f5c\u6570\u7ec4\u4e2d\u7684\u5bf9\u8c61\u3002\u4f8b\u5982\uff0c\u8981\u83b7\u53d6\u6570\u7ec4\u4e2d\u7b2c\u4e00\u4e2a\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n<pre>Person firstPerson = people[0];<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u540c\u6837\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 people[index] \u8bed\u6cd5\u8bbf\u95ee\u6570\u7ec4\u4e2d\u7684\u4efb\u4f55\u5bf9\u8c61\uff0c\u5176\u4e2d index \u662f\u5bf9\u8c61\u5728\u6570\u7ec4\u4e2d\u7684\u7d22\u5f15\u3002<\/p>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5f53\u6211\u4eec\u4f7f\u7528 new \u64cd\u4f5c\u7b26\u521b\u5efa\u5bf9\u8c61\u6570\u7ec4\u65f6\uff0c\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u90fd\u662f null\u3002\u56e0\u6b64\uff0c\u5728\u4f7f\u7528\u6570\u7ec4\u4e2d\u7684\u5bf9\u8c61\u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u5148\u521b\u5efa\u8fd9\u4e9b\u5bf9\u8c61\u5e76\u5c06\u5176\u5206\u914d\u7ed9\u6570\u7ec4\u5143\u7d20\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>people[0] = new Person(\"John\", 30);\npeople[1] = new Person(\"Mary\", 25);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u73b0\u5728\uff0cpeople \u6570\u7ec4\u4e2d\u5305\u542b\u4e24\u4e2a\u5bf9\u8c61\uff0c\u6211\u4eec\u53ef\u4ee5\u8bbf\u95ee\u548c\u64cd\u4f5c\u8fd9\u4e9b\u5bf9\u8c61\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u521b\u5efa\u7c7b\u7684\u5bf9\u8c61\u6570\u7ec4\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 java \u4e2d\uff0c\u4f7f\u7528 new \u64cd\u4f5c\u7b26\u521b\u5efa\u7c7b\u5bf9\u8c61\u6570\u7ec4\u7684\u6b65\u9aa4\u5982\u4e0b\uff1a\u6307\u5b9a\u8981\u521b\u5efa\u5bf9\u8c61\u6570\u7ec4\u7684\u7c7b\u7684\u540d\u79f0\u3002\u58f0\u660e\u5bf9\u8c61\u6570\u7ec4\u7684\u540d\u79f0\u3002\u4f7f\u7528 new \u64cd\u4f5c\u7b26\u521b\u5efa\u6307\u5b9a\u5927\u5c0f\u7684\u5bf9\u8c61\u6570\u7ec4\u3002\u4f7f\u7528\u6570\u7ec4\u7d22\u5f15\u8bbf\u95ee\u548c\u64cd\u4f5c\u6570\u7ec4\u4e2d\u7684\u5bf9\u8c61\u3002\u5728\u4f7f\u7528\u6570\u7ec4\u4e2d\u7684\u5bf9\u8c61\u4e4b\u524d\uff0c\u9700\u8981\u5148\u521b\u5efa\u8fd9\u4e9b\u5bf9\u8c61\u5e76\u5c06\u5176\u5206\u914d\u7ed9\u6570\u7ec4\u5143\u7d20\u3002 \u5982\u4f55\u4f7f\u7528 Java \u521b\u5efa\u7c7b\u7684\u5bf9\u8c61\u6570\u7ec4 \u5728 Java \u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 new \u64cd\u4f5c\u7b26\u521b\u5efa\u4e00\u4e2a\u7c7b\u7684\u5bf9\u8c61\u6570\u7ec4\u3002\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\uff1a ClassName[] arrayName = new ClassName[size]; \u767b\u5f55\u540e\u590d\u5236 \u5176\u4e2d\uff1a ClassName \u662f\u8981\u521b\u5efa\u5bf9\u8c61\u6570\u7ec4\u7684\u7c7b\u7684\u540d\u79f0\u3002 arrayName \u662f\u5bf9\u8c61\u6570\u7ec4\u7684\u540d\u79f0\u3002 size \u662f\u6570\u7ec4\u7684\u5927\u5c0f\uff0c\u5373\u6570\u7ec4\u53ef\u4ee5\u5bb9\u7eb3\u7684\u5bf9\u8c61\u6570\u91cf\u3002 \u4f8b\u5982\uff0c\u8981\u521b\u5efa\u4e00\u4e2a\u5305\u542b 5 \u4e2a Person \u5bf9\u8c61\u7684\u6570\u7ec4\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b Person[] people = new Person[5]; \u767b\u5f55\u540e\u590d\u5236 \u73b0\u5728\uff0cpeople \u6570\u7ec4\u5df2\u7ecf\u521b\u5efa\u597d\u4e86\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u6570\u7ec4\u7d22\u5f15\u6765\u8bbf\u95ee\u548c\u64cd\u4f5c\u6570\u7ec4\u4e2d\u7684\u5bf9\u8c61\u3002\u4f8b\u5982\uff0c\u8981\u83b7\u53d6\u6570\u7ec4\u4e2d\u7b2c\u4e00\u4e2a\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a Person firstPerson = people[0]; \u767b\u5f55\u540e\u590d\u5236 \u540c\u6837\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 people[index] \u8bed\u6cd5\u8bbf\u95ee\u6570\u7ec4\u4e2d\u7684\u4efb\u4f55\u5bf9\u8c61\uff0c\u5176\u4e2d index \u662f\u5bf9\u8c61\u5728\u6570\u7ec4\u4e2d\u7684\u7d22\u5f15\u3002 \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5f53\u6211\u4eec\u4f7f\u7528 new \u64cd\u4f5c\u7b26\u521b\u5efa\u5bf9\u8c61\u6570\u7ec4\u65f6\uff0c\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u90fd\u662f [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-38191","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/38191","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=38191"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/38191\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=38191"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=38191"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=38191"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}