{"id":31390,"date":"2023-09-02T07:03:48","date_gmt":"2024-01-24T01:09:02","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91arraylist%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%9f%a5%e8%af%86\/"},"modified":"2025-08-12T23:47:55","modified_gmt":"2025-08-12T15:47:55","slug":"%e3%80%90java%e3%80%91arraylist%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%9f%a5%e8%af%86","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91arraylist%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%9f%a5%e8%af%86\/","title":{"rendered":"\u3010Java\u3011ArrayList\u7684\u57fa\u672c\u77e5\u8bc6"},"content":{"rendered":"

ArrayList\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784<\/h1>\n

\u5728Java\u7684\u5e38\u89c4\u6570\u7ec4\u4e2d\uff0c\u9700\u8981\u4ece\u4e00\u5f00\u59cb\u5c31\u51b3\u5b9a\u6570\u7ec4\u7684\u5927\u5c0f\u3002<\/p>\n

a<\/span>=<\/span>new<\/span> int<\/span>[<\/span>10<\/span>]<\/span>\r\n<\/code><\/pre>\n
\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u65e0\u6cd5\u5728\u4ee5\u540e\u66f4\u6539\u6570\u7ec4\u7684\u6570\u91cf\uff0c\u6216\u8005\u5f53\u6570\u7ec4\u7684\u6570\u91cf\u4ece\u4e00\u5f00\u59cb\u5c31\u6ca1\u6709\u786e\u5b9a\u7684\u65f6\u5019\uff0c\u8fd9\u662f\u5f88\u4e0d\u65b9\u4fbf\u7684\u3002
\nArrayList\u662f\u4e8b\u5148\u51c6\u5907\u597d\u7684Java\u7c7b\uff0c\u5b83\u53ef\u4ee5\u89e3\u51b3\u8fd9\u79cd\u4e0d\u4fbf\u3002<\/p>\n
ArrayList\u7684\u7279\u70b9<\/h1>\n
\u4ee5\u4e0b\u662f\u5176\u7279\u70b9\uff1a<\/p>\n
1. \u53ef\u4ee5\u5904\u7406\u4efb\u4f55\u7c7b\u578b\u7684\u5bf9\u8c61\u3002
\n2. \u53ef\u4ee5\u5728\u6570\u7ec4\u4e2d\u540e\u7eed\u6dfb\u52a0\u503c\u3002
\n3. \u6dfb\u52a0\u7684\u503c\u4f1a\u6309\u7167\u6dfb\u52a0\u7684\u987a\u5e8f\u6392\u5217\u3002
\n4. \u53ef\u4ee5\u6dfb\u52a0null\u4f5c\u4e3a\u503c\u3002
\n5. \u53ef\u4ee5\u6dfb\u52a0\u91cd\u590d\u7684\u503c\u3002
\n6. \u4e0d\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\u3002<\/p>\n
\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u4e0e\u4f20\u7edf\u6570\u7ec4\u76f8\u6bd4\uff0cArrayList\u66f4\u5e38\u88ab\u4f7f\u7528\u3002<\/p>\n
ArrayList\u600e\u4e48\u5199<\/h1>\n
ArrayList\u7684\u5199\u6cd5\u5982\u4e0b\u3002<\/p>\n
ArrayList<\/span><<\/span>\u578b<\/span>><\/span> \u30ea\u30b9\u30c8\u540d<\/span> =<\/span> new<\/span> ArrayList<\/span><<\/span>\u578b<\/span>>();<\/span>\r\n<\/code><\/pre>\n
\u5728\u300c\u578b\u300d\u4e2d\uff0c\u9700\u8981\u6307\u5b9a\u7c7b\u540d\u3002
\n\u53ef\u4ee5\u5c06\u6307\u5b9a\u7c7b\u7684\u5bf9\u8c61\u5b58\u50a8\u4e3a\u5217\u8868\u7684\u5143\u7d20\u3002<\/p>\n
\u6211\u4f1a\u8bd5\u7740\u4eb2\u81ea\u5199\u51fa\u6765\u3002<\/p>\n
ArrayList<\/span><<\/span>String<\/span>><\/span> strList<\/span> =<\/span> new<\/span> ArrayList<\/span><<\/span>String<\/span>>();<\/span>\r\n<\/code><\/pre>\n
ArrayList<\/span><<\/span>Integer<\/span>><\/span> intList<\/span> =<\/span> new<\/span> ArrayList<\/span><<\/span>Integer<\/span>>();<\/span>\r\n<\/code><\/pre>\n
\u5728\u8fd9\u91cc\u6709\u4e00\u4e2a\u6ce8\u610f\u4e8b\u9879\u3002\u5217\u8868\u7684\u5143\u7d20\u5fc5\u987b\u662f\u5f15\u7528\u7c7b\u578b\u3002
\n\u4f8b\u5982\uff0c\u4e0d\u80fd\u521b\u5efa\u4e00\u4e2a\u5177\u6709\u57fa\u672c\u6570\u636e\u7c7b\u578b\uff08\u4f8b\u5982int\uff09\u4f5c\u4e3a\u5143\u7d20\u7684\u5217\u8868\u3002
\n\u5982\u679c\u60f3\u8981\u5c06\u50cfint\u8fd9\u6837\u7684\u57fa\u672c\u6570\u636e\u7c7b\u578b\u653e\u5165\u5217\u8868\u4e2d\uff0c\u53ef\u4ee5\u50cf\u4e0a\u9762\u7684”\u5728Integer\u60c5\u51b5\u4e0b”\u90a3\u6837\u4f7f\u7528\u5305\u88c5\u7c7b\u8fdb\u884c\u5b9a\u4e49\u3002
\n\uff08\u57fa\u672c\u6570\u636e\u7c7b\u578b\u662f\u6307\u4e0e\u5f15\u7528\u7c7b\u578b\u4e0d\u540c\uff0c\u76f4\u63a5\u5b58\u50a8\u503c\u7684\u7c7b\u578b\u3002\uff09<\/p>\n
\u5728\u4e2d\u56fd\uff0cArraylist \u7684\u4e3b\u8981\u65b9\u6cd5\u5982\u4e0b\uff1a<\/h1>\n
AllayList\u4e2d\u9884\u5148\u63d0\u4f9b\u4e86\u4e00\u4e9b\u65b9\u4fbf\u7684\u65b9\u6cd5\u3002
\n\u4e0b\u9762\u662f\u5e38\u7528\u7684\u65b9\u6cd5\u6c47\u603b\u3002<\/p>\n
\n
\u30e1\u30bd\u30c3\u30c9\u540d\u6a5f\u80fdvoid add<\/strong>(int index, Object element)\u30ea\u30b9\u30c8\u306e\u6307\u5b9a\u3057\u305f\u4f4d\u7f6e\u306b\u3001\u6307\u5b9a\u3057\u305f\u8981\u7d20\u3092\u8ffd\u52a0\u3059\u308b\u3002boolean add<\/strong>(Object element)\u30ea\u30b9\u30c8\u306e\u672b\u5c3e\u306b\u8981\u7d20\u3092\u8ffd\u52a0\u3059\u308b\u3002void clear<\/strong>()\u30ea\u30b9\u30c8\u304b\u3089\u3059\u3079\u3066\u306e\u8981\u7d20\u3092\u524a\u9664\u3059\u308b\u3002Object get<\/strong>(int idex)\u30ea\u30b9\u30c8\u306e\u6307\u5b9a\u3057\u305f\u4f4d\u7f6e\u306e\u8981\u7d20\u3092\u53d6\u5f97\u3059\u308b\u3002int indexOf<\/strong>(Object element)\u5f15\u6570\u3068\u540c\u3058\u8981\u7d20\u3092\u5148\u982d\u304b\u3089\u691c\u7d22\u3059\u308b\u3002boolean isEmpty<\/strong>()\u30ea\u30b9\u30c8\u304c\u7a7a\u304b\u3069\u3046\u304b\u8abf\u3079\u308b\u3002\u7a7a\u306e\u5834\u5408\u3001true\u3092\u8fd4\u3059\u3002Object remove<\/strong>(int index)\u30ea\u30b9\u30c8\u306e\u6307\u5b9a\u3057\u305f\u4f4d\u7f6e\u304b\u3089\u8981\u7d20\u3092\u524a\u9664\u3059\u308b\u3002Object set<\/strong>(int index, Object element)\u30ea\u30b9\u30c8\u306e\u6307\u5b9a\u3057\u305f\u4f4d\u7f6e\u306e\u8981\u7d20\u3092\u3001\u6307\u5b9a\u3057\u305f\u65b0\u3057\u3044\u8981\u7d20\u306b\u7f6e\u304d\u63db\u3048\u308b\u3002int size<\/strong>()\u30ea\u30b9\u30c8\u306b\u5165\u3063\u3066\u3044\u308b\u8981\u7d20\u306e\u6570\u3092\u53d6\u5f97\u3059\u308b\u3002<\/div>\n<\/div>\n
\u8bd5\u7740\u5b9e\u9645\u5199\u4e00\u4e0b<\/h1>\n
\u6211\u4eec\u5c06\u4f7f\u7528ArrayList\u6765\u5b9e\u9645\u7f16\u5199\u4ee3\u7801\u3002<\/p>\n
\u53ea\u9700\u8981\u4e00\u4e2a\u9009\u9879,\u8bf7\u5c06\u4ee5\u4e0b\u53e5\u5b50\u7528\u4e2d\u6587\u81ea\u7136\u5730\u6539\u5199\uff1a<\/h3>\n
\u4f8b\uff11<\/p>\n
The cat is sitting on the wall.<\/p>\n
\/\/ArrayList\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30dd\u30fc\u30c8<\/span>\r\nimport<\/span> java.util.ArrayList<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> Main<\/span>{<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>){<\/span>\r\n        \/\/\u578b\u3092\u6307\u5b9a\u3057\u306a\u304f\u3066\u3082\u3088\u3044<\/span>\r\n        ArrayList<\/span> list<\/span> =<\/span> new<\/span> ArrayList<\/span><>;<\/span>\r\n        \/\/\u8981\u7d20\u3092\u8ffd\u52a0\u3057\u3066\u3044\u304f<\/span>\r\n        list<\/span>.<\/span>add<\/span>(<\/span>\"\u307f\u304b\u3093\"<\/span>);<\/span>\r\n        list<\/span>.<\/span>add<\/span>(<\/span>5<\/span>);<\/span>\r\n        list<\/span>.<\/span>add<\/span>(<\/span>'A'<\/span>);<\/span>\r\n        \/\/\u30ea\u30b9\u30c8\u306e\u4e2d\u8eab\u3092\u51fa\u529b\u3059\u308b<\/span>\r\n        for<\/span> (<\/span>Object<\/span> obj<\/span> :<\/span> list<\/span>){<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>print<\/span>(<\/span>obj<\/span>);<\/span>\r\n     }<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u307f\u304b\u30935A<\/span>\r\n<\/code><\/pre>\n
\u60a8\u53ef\u4ee5\u5c06\u5177\u6709\u4e0d\u540c\u7c7b\u578b\u7684\u5143\u7d20\u6dfb\u52a0\u5230\u4e00\u4e2a\u5217\u8868\u4e2d\u3002<\/p>\n
\u8bf7\u4f60\u63d0\u4f9b\u66f4\u591a\u7684\u4e0a\u4e0b\u6587\u548c\u5177\u4f53\u7684\u5185\u5bb9\uff0c\u4ee5\u4fbf\u6211\u80fd\u591f\u4e3a\u4f60\u51c6\u786e\u5730\u8fdb\u884c\u7ffb\u8bd1\u3002<\/h3>\n
\/\/ArrayList\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30dd\u30fc\u30c8<\/span>\r\nimport<\/span> java.util.ArrayList<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> Main<\/span>{<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>){<\/span>\r\n        \/\/\u5909\u6570str\u306b\u3001\u6587\u5b57\u5217abcdefg\u3092\u4ee3\u5165<\/span>\r\n        String<\/span> str<\/span> =<\/span> \"abcdefg\"<\/span>;<\/span>\r\n        \/\/indexOf\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u5f15\u6570a\u3092\u5909\u6570str\u304b\u3089\u691c\u7d22<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>print<\/span>(<\/span>str<\/span>.<\/span>indexOf<\/span>(<\/span>\"a\"<\/span>));<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
0<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u4e2a\u4f8b\u5b50\u662f\u4f7f\u7528indexOf\u65b9\u6cd5\u3002\u6211\u4eec\u4ece\u53d8\u91cfstr\u4e2d\u7684\u5b57\u7b26\u4e32\u201cabcdefg\u201d\u4e2d\u641c\u7d22\u4e86\u5728indexOf\u65b9\u6cd5\u7684\u53c2\u6570\u4e2d\u8bbe\u7f6e\u7684\u201ca\u201d\u3002
\n\u6267\u884c\u7ed3\u679c\u4e2d\u7684\u201c0\u201d\u8868\u793a\u5728\u5b57\u7b26\u4e32\u201cabcdefg\u201d\u4e2d\uff0c\u201ca\u201d\u7684\u4f4d\u7f6e\u3002
\n\u201ca\uff080\uff09b\uff081\uff09c\uff082\uff09d\uff083\uff09e\uff084\uff09f\uff085\uff09g\uff086\uff09\u201d\uff0c\u62ec\u53f7\u5185\u7684\u6570\u5b57\u8868\u793a\u4f4d\u7f6e\u3002
\n\u56e0\u6b64\uff0c\u4f8b\u5982\u5982\u679cindexOf\u65b9\u6cd5\u7684\u53c2\u6570\u662fd\uff0c\u90a3\u4e48\u7ed3\u679c\u5c31\u662f3\uff1b\u5982\u679c\u662fg\uff0c\u7ed3\u679c\u5c31\u662f6\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
ArrayList\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784 \u5728Java\u7684\u5e38\u89c4\u6570\u7ec4\u4e2d\uff0c\u9700\u8981\u4ece\u4e00\u5f00\u59cb\u5c31\u51b3\u5b9a\u6570\u7ec4\u7684\u5927\u5c0f\u3002 a=new int[ […]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-31390","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"\n\u3010Java\u3011ArrayList\u7684\u57fa\u672c\u77e5\u8bc6 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u3010Java\u3011ArrayList\u7684\u57fa\u672c\u77e5\u8bc6\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010java\u3011arraylist\u7684\u57fa\u672c\u77e5\u8bc6\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010Java\u3011ArrayList\u7684\u57fa\u672c\u77e5\u8bc6\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8e\u3010Java\u3011ArrayList\u7684\u57fa\u672c\u77e5\u8bc6\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010java\u3011arraylist\u7684\u57fa\u672c\u77e5\u8bc6\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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