{"id":31182,"date":"2022-11-30T22:32:33","date_gmt":"2023-03-04T09:39:54","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%85%b3%e4%ba%8ejava-arraylist\/"},"modified":"2025-08-12T22:43:33","modified_gmt":"2025-08-12T14:43:33","slug":"%e5%85%b3%e4%ba%8ejava-arraylist","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%85%b3%e4%ba%8ejava-arraylist\/","title":{"rendered":"\u5173\u4e8eJava ArrayList"},"content":{"rendered":"<h1>\u9996\u5148<\/h1>\n<p>\u6211\u5bf9\u6536\u85cf\u54c1\u5b66\u4e60\u7684\u5185\u5bb9\u8fdb\u884c\u4e86\u603b\u7ed3\u3002<\/p>\n<p>\u672c\u6b21\u8ba8\u8bba\u7684\u662f\u5173\u4e8eArrayList\u3002<\/p>\n<h2>ArrayList\u7684\u4f7f\u7528\u65b9\u6cd5<\/h2>\n<ul class=\"post-ul\">ArrayList\u306e\u5ba3\u8a00\u3068\u78ba\u4fdd<\/ul>\n<pre class=\"post-pre\"><code>ArrayList&lt; ~ &gt; \u5909\u6570\u540d = new ArrayList&lt;&gt;();\r\n\r\n<\/code><\/pre>\n<p>\u203b \u5728\u6b64\u90e8\u5206\u4e2d\uff0c\u9700\u8981\u6307\u5b9a\u5c06\u5b9e\u4f8b\u7c7b\u578b\u540d\u79f0\u5b58\u50a8\u5728ArrayList\u4e2d\u3002<\/p>\n<ul class=\"post-ul\">\u8981\u7d20\u306e\u8ffd\u52a0\u3001\u53d6\u5f97\u3001\u524a\u9664\u3001\u8abf\u67fb<\/ul>\n<div>\n<div class=\"post-table\">\u623b\u308a\u5024\u30e1\u30bd\u30c3\u30c9\u610f\u5473booleanadd(~)\u30ea\u30b9\u30c8\u306e\u6700\u5f8c\u306b\u8981\u7d20\u3092\u8ffd\u52a0\u3059\u308b\u3002voidadd(int, ~)\u30ea\u30b9\u30c8\u306eint\u756a\u76ee\u306b\u8981\u7d20\u3092\u633f\u5165\u3059\u308b\u3002~set(int, ~)\u30ea\u30b9\u30c8\u306eint\u756a\u76ee\u306e\u8981\u7d20\u3092\u4e0a\u66f8\u304d\u3059\u308b\u3002~get(int)int\u756a\u76ee\u306e\u8981\u7d20\u3092\u53d6\u308a\u51fa\u3059\u3002intsize()\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b\u8981\u7d20\u6570\u3092\u8fd4\u3059\u3002~remove(int)int\u756a\u76ee\u306e\u8981\u7d20\u3092\u524a\u9664\u3059\u308b\u3002<\/div>\n<\/div>\n<p>\u4f7f\u7528remove()\u65b9\u6cd5\u540e\uff0c\u88ab\u5220\u9664\u7684\u5143\u7d20\u540e\u9762\u7684\u6240\u6709\u5143\u7d20\u90fd\u4f1a\u4f9d\u6b21\u5411\u524d\u79fb\u52a8\u4e00\u4e2a\u4f4d\u7f6e\u3002<\/p>\n<h2>\u793a\u4f8b\u4ee3\u7801<\/h2>\n<pre class=\"post-pre\"><code>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.util.ArrayList<\/span><span class=\"o\">;<\/span>  <span class=\"c1\">\/\/\u89e3\u8aac\u2460<\/span>\r\n\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Main<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n\r\n        <span class=\"nc\">ArrayList<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">String<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">names<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ArrayList<\/span><span class=\"o\">&lt;&gt;();<\/span>  <span class=\"c1\">\/\/\u89e3\u8aac\u2461<\/span>\r\n\r\n        <span class=\"n\">names<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u30b5\u30c8\u30b7\"<\/span><span class=\"o\">);<\/span>  <span class=\"c1\">\/\/names\u306b\u8981\u7d20\u3092\u683c\u7d0d - 0\u304b\u3089\u59cb\u307e\u308b\u3002<\/span>\r\n        <span class=\"n\">names<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u30b7\u30b2\u30eb\"<\/span><span class=\"o\">);<\/span>  <span class=\"c1\">\/\/ \uff11<\/span>\r\n        <span class=\"n\">names<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u30bf\u30b1\u30b7\"<\/span><span class=\"o\">);<\/span>  <span class=\"c1\">\/\/ 2<\/span>\r\n\r\n        <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">names<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"mi\">0<\/span><span class=\"o\">));<\/span>\r\n\r\n        <span class=\"n\">names<\/span><span class=\"o\">.<\/span><span class=\"na\">set<\/span><span class=\"o\">(<\/span><span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"\u30ab\u30b9\u30df\"<\/span><span class=\"o\">);<\/span>  <span class=\"c1\">\/\/names\u306e0\u306e\u8981\u7d20\u3092\"\u30ab\u30b9\u30df\"\u306b\u4e0a\u66f8\u304d\u3059\u308b\u3002<\/span>\r\n\r\n        <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">names<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"mi\">0<\/span><span class=\"o\">));<\/span>\r\n\r\n        <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">names<\/span><span class=\"o\">.<\/span><span class=\"na\">size<\/span><span class=\"o\">());<\/span>  <span class=\"c1\">\/\/ \u8981\u7d20\u6570\u3092\u51fa\u529b<\/span>\r\n\r\n        <span class=\"n\">names<\/span><span class=\"o\">.<\/span><span class=\"na\">remove<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">);<\/span>  <span class=\"c1\">\/\/ \u6307\u5b9a\u4f4d\u7f6e\u306e\u8981\u7d20\u3092\u524a\u9664<\/span>\r\n\r\n        <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">names<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">));<\/span>\r\n\r\n    <span class=\"o\">}<\/span>\r\n\r\n<span class=\"o\">}<\/span>\r\n\r\n<\/code><\/pre>\n<p>\u6267\u884c\u7ed3\u679c<\/p>\n<pre class=\"post-pre\"><code>\r\n\u30b5\u30c8\u30b7\r\n\u30ab\u30b9\u30df\r\n3\r\n\u30bf\u30b1\u30b7\r\n\r\n<\/code><\/pre>\n<h2>\u89e3\u91ca<\/h2>\n<p>\u5199\u5165import\u8bed\u53e5\u3002<\/p>\n<p>\u4f7f\u7528&lt;&gt;\u7b26\u53f7\uff08\u6cdb\u578b\uff09\uff0c\u6307\u5b9a\u8981\u5b58\u50a8\u7684\u7c7b\u578b\u3002<\/p>\n<ul class=\"post-ul\">\u6ce8\u610f\u70b9<\/ul>\n<p>\u4e0d\u80fd\u5b58\u50a8\u975e\u5b9e\u4f8b\u5316\u7684\u5185\u5bb9\u3002\uff08\u65e0\u6cd5\u5b58\u50a8\u57fa\u672c\u6570\u636e\u7c7b\u578b\u7684\u4fe1\u606f\u3002\uff09<\/p>\n<p>\u5982\u679c\u8981\u5b58\u50a8 int \u7c7b\u578b\u7684\u4fe1\u606f\uff0c\u53ea\u9700\u5c06\u5176\u8f6c\u6362\u6210 Integer \u5b9e\u4f8b\u5373\u53ef\u8fdb\u884c\u5b58\u50a8\u3002<\/p>\n<pre class=\"post-pre\"><code>(\u00d7) ArrayList&lt;int&gt;  (\u25cb) ArrayList&lt;Integer&gt;\r\n\r\n<\/code><\/pre>\n<h2>\u6700\u7ec8 (zu\u00ec , \u6700\u540e (zu\u00ec<\/h2>\n<p>\u6211\u5e0c\u671b\u4ee5\u540e\u4e5f\u53ef\u4ee5\u7ee7\u7eed\u603b\u7ed3\u5173\u4e8e\u6536\u85cf\u54c1\u7684\u4e8b\u60c5\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9996\u5148 \u6211\u5bf9\u6536\u85cf\u54c1\u5b66\u4e60\u7684\u5185\u5bb9\u8fdb\u884c\u4e86\u603b\u7ed3\u3002 \u672c\u6b21\u8ba8\u8bba\u7684\u662f\u5173\u4e8eArrayList\u3002 ArrayList\u7684\u4f7f\u7528\u65b9\u6cd5 A [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-31182","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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