{"id":36695,"date":"2024-11-26T10:00:40","date_gmt":"2024-11-26T02:00:40","guid":{"rendered":"https:\/\/fwq.ai\/blog\/36695\/"},"modified":"2024-11-26T10:00:40","modified_gmt":"2024-11-26T02:00:40","slug":"java%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e7%94%b3%e8%af%b7","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/36695\/","title":{"rendered":"java\u6570\u7ec4\u600e\u4e48\u7533\u8bf7"},"content":{"rendered":"<blockquote><p>\n  java \u4e2d\u7533\u8bf7\u6570\u7ec4\u6709\u4e24\u79cd\u65b9\u6cd5\uff1a\u521b\u5efa\u65b0\u6570\u7ec4\uff1a\u4f7f\u7528 new \u5173\u952e\u5b57\u6307\u5b9a\u6570\u636e\u7c7b\u578b\u548c\u6570\u7ec4\u957f\u5ea6\u3002\u521d\u59cb\u5316\u6570\u7ec4\uff1a\u4f7f\u7528 {} \u6307\u5b9a\u6570\u636e\u7c7b\u578b\u548c\u5143\u7d20\u7684\u503c\u3002\u6570\u7ec4\u957f\u5ea6\u5728\u521b\u5efa\u65f6\u786e\u5b9a\uff0c\u4e0d\u53ef\u66f4\u6539\u3002\u53ef\u901a\u8fc7 length \u5c5e\u6027\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\u3002\u4f7f\u7528\u4e0b\u6807\u8fd0\u7b97\u7b26 [] \u8bbf\u95ee\u548c\u8d4b\u503c\u6570\u7ec4\u5143\u7d20\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/12\/2024111214122579436.jpg\" class=\"aligncenter\" title=\"java\u6570\u7ec4\u600e\u4e48\u7533\u8bf7\u63d2\u56fe\" alt=\"java\u6570\u7ec4\u600e\u4e48\u7533\u8bf7\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u6570\u7ec4\u7533\u8bf7\u65b9\u6cd5<\/strong><\/p>\n<p>Java \u6570\u7ec4\u662f\u5b58\u50a8\u76f8\u540c\u7c7b\u578b\u5143\u7d20\u7684\u96c6\u5408\uff0c\u5728 Java \u4e2d\u6709\u4e24\u79cd\u7533\u8bf7\u6570\u7ec4\u7684\u65b9\u6cd5\uff1a<\/p>\n<p><strong>1. \u521b\u5efa\u65b0\u6570\u7ec4<\/strong><\/p>\n<p>\u4f7f\u7528 new \u5173\u952e\u5b57\u521b\u5efa\u6570\u7ec4\uff0c\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>\u6570\u636e\u7c7b\u578b[] \u6570\u7ec4\u540d = new \u6570\u636e\u7c7b\u578b[\u6570\u7ec4\u957f\u5ea6];<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre>int[] numbers = new int[10];  \/\/ \u521b\u5efa\u4e00\u4e2a\u957f\u5ea6\u4e3a 10 \u7684 int \u6570\u7ec4<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u521d\u59cb\u5316\u6570\u7ec4<\/strong><\/p>\n<p>\u4f7f\u7528 {} \u521d\u59cb\u5316\u6570\u7ec4\uff0c\u5e76\u540c\u65f6\u6307\u5b9a\u6570\u7ec4\u5143\u7d20\u7684\u503c\uff0c\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n<pre>\u6570\u636e\u7c7b\u578b[] \u6570\u7ec4\u540d = {\u5143\u7d201, \u5143\u7d202, ..., \u5143\u7d20n};<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre>String[] names = {\"John\", \"Mary\", \"Bob\"};  \/\/ \u521b\u5efa\u4e00\u4e2a\u5305\u542b 3 \u4e2a\u5143\u7d20\u7684 String \u6570\u7ec4<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u6570\u7ec4\u957f\u5ea6<\/strong><\/p>\n<p>\u6570\u7ec4\u957f\u5ea6\u5728\u521b\u5efa\u65f6\u786e\u5b9a\uff0c\u5e76\u4e14\u4e0d\u80fd\u66f4\u6539\u3002\u53ef\u4ee5\u901a\u8fc7 length \u5c5e\u6027\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\uff1a<\/p>\n<pre>int arrayLength = arrayName.length;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u6570\u7ec4\u8bbf\u95ee<\/strong><\/p>\n<p>\u53ef\u4ee5\u4f7f\u7528\u4e0b\u6807\u8fd0\u7b97\u7b26 [] \u8bbf\u95ee\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\uff1a<\/p>\n<pre>\/\/ \u83b7\u53d6\u6570\u7ec4\u7b2c\u4e00\u4e2a\u5143\u7d20\nint firstElement = arrayName[0];<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u6570\u7ec4\u8d4b\u503c<\/strong><\/p>\n<p>\u4e5f\u53ef\u4ee5\u4f7f\u7528\u4e0b\u6807\u8fd0\u7b97\u7b26\u7ed9\u6570\u7ec4\u5143\u7d20\u8d4b\u503c\uff1a<\/p>\n<pre>\/\/ \u7ed9\u6570\u7ec4\u7b2c\u4e00\u4e2a\u5143\u7d20\u8d4b\u503c\narrayName[0] = newValue;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4\u600e\u4e48\u7533\u8bf7\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>java \u4e2d\u7533\u8bf7\u6570\u7ec4\u6709\u4e24\u79cd\u65b9\u6cd5\uff1a\u521b\u5efa\u65b0\u6570\u7ec4\uff1a\u4f7f\u7528 new \u5173\u952e\u5b57\u6307\u5b9a\u6570\u636e\u7c7b\u578b\u548c\u6570\u7ec4\u957f\u5ea6\u3002\u521d\u59cb\u5316\u6570\u7ec4\uff1a\u4f7f\u7528 {} \u6307\u5b9a\u6570\u636e\u7c7b\u578b\u548c\u5143\u7d20\u7684\u503c\u3002\u6570\u7ec4\u957f\u5ea6\u5728\u521b\u5efa\u65f6\u786e\u5b9a\uff0c\u4e0d\u53ef\u66f4\u6539\u3002\u53ef\u901a\u8fc7 length \u5c5e\u6027\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\u3002\u4f7f\u7528\u4e0b\u6807\u8fd0\u7b97\u7b26 [] \u8bbf\u95ee\u548c\u8d4b\u503c\u6570\u7ec4\u5143\u7d20\u3002 Java \u6570\u7ec4\u7533\u8bf7\u65b9\u6cd5 Java \u6570\u7ec4\u662f\u5b58\u50a8\u76f8\u540c\u7c7b\u578b\u5143\u7d20\u7684\u96c6\u5408\uff0c\u5728 Java \u4e2d\u6709\u4e24\u79cd\u7533\u8bf7\u6570\u7ec4\u7684\u65b9\u6cd5\uff1a 1. \u521b\u5efa\u65b0\u6570\u7ec4 \u4f7f\u7528 new \u5173\u952e\u5b57\u521b\u5efa\u6570\u7ec4\uff0c\u683c\u5f0f\u5982\u4e0b\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u6570\u636e\u7c7b\u578b[] \u6570\u7ec4\u540d = new \u6570\u636e\u7c7b\u578b[\u6570\u7ec4\u957f\u5ea6]; \u767b\u5f55\u540e\u590d\u5236 \u4f8b\u5982\uff1a int[] numbers = new int[10]; \/\/ \u521b\u5efa\u4e00\u4e2a\u957f\u5ea6\u4e3a 10 \u7684 int \u6570\u7ec4 \u767b\u5f55\u540e\u590d\u5236 2. \u521d\u59cb\u5316\u6570\u7ec4 \u4f7f\u7528 {} \u521d\u59cb\u5316\u6570\u7ec4\uff0c\u5e76\u540c\u65f6\u6307\u5b9a\u6570\u7ec4\u5143\u7d20\u7684\u503c\uff0c\u683c\u5f0f\u5982\u4e0b\uff1a \u6570\u636e\u7c7b\u578b[] \u6570\u7ec4\u540d = {\u5143\u7d201, \u5143\u7d202, &#8230;, \u5143\u7d20n}; \u767b\u5f55\u540e\u590d\u5236 \u4f8b\u5982\uff1a [&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-36695","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/36695","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=36695"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/36695\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=36695"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=36695"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=36695"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}