{"id":31020,"date":"2023-01-16T18:06:22","date_gmt":"2023-02-05T23:56:13","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84arraylist%e7%b1%bb%e6%98%afjava-util-arraylist%e7%b1%bb%e3%80%82\/"},"modified":"2025-08-12T21:54:15","modified_gmt":"2025-08-12T13:54:15","slug":"java%e7%9a%84arraylist%e7%b1%bb%e6%98%afjava-util-arraylist%e7%b1%bb%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84arraylist%e7%b1%bb%e6%98%afjava-util-arraylist%e7%b1%bb%e3%80%82\/","title":{"rendered":"Java\u7684ArrayList\u7c7b\u662fjava.util.ArrayList\u7c7b"},"content":{"rendered":"

\uff11\uff0c\u521b\u5efaArrayList\u7684\u65b9\u6cd5<\/p>\n

\u278a\u98df\u7269\u5217\u8868 = \u65b0\u7684\u6570\u7ec4\u5217\u8868();<\/p><\/blockquote>\n

\uff12\uff0c\u6e90\u4ee3\u7801<\/p>\n

\u4e00\u7ef4\u6570\u7ec4<\/p><\/blockquote>\n

import<\/span> java.util.ArrayList<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> Main<\/span> {<\/span>\r\n\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n\r\n        ArrayList<\/span><<\/span>String<\/span>><\/span> food<\/span> =<\/span> new<\/span> ArrayList<\/span><<\/span>String<\/span>>();<\/span>\r\n\r\n        food<\/span>.<\/span>add<\/span>(<\/span>\"pizza\"<\/span>);<\/span>\r\n        food<\/span>.<\/span>add<\/span>(<\/span>\"hambueger\"<\/span>);<\/span>\r\n        food<\/span>.<\/span>add<\/span>(<\/span>\"hotdog\"<\/span>);<\/span>\r\n\r\n        food<\/span>.<\/span>set<\/span>(<\/span>0<\/span>,<\/span> \"sushi\"<\/span>);<\/span>\r\n        food<\/span>.<\/span>remove<\/span>(<\/span>2<\/span>);<\/span>\r\n        food<\/span>.<\/span>clear<\/span>();<\/span>\r\n\r\n        for<\/span> (<\/span>int<\/span> i<\/span> =<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> food<\/span>.<\/span>size<\/span>();<\/span> i<\/span>++)<\/span> {<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>food<\/span>.<\/span>get<\/span>(<\/span>i<\/span>));<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4e8c\u7ef4\u6570\u7ec4<\/p><\/blockquote>\n
import<\/span> java.util.ArrayList<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> Main<\/span> {<\/span>\r\n\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n\r\n        ArrayList<\/span><<\/span>ArrayList<\/span><<\/span>String<\/span>>><\/span> groceryList<\/span> =<\/span> new<\/span> ArrayList<\/span><>();<\/span>\r\n\r\n        ArrayList<\/span><<\/span>String<\/span>><\/span> bakeryList<\/span> =<\/span> new<\/span> ArrayList<\/span><>();<\/span>\r\n\r\n        bakeryList<\/span>.<\/span>add<\/span>(<\/span>\"pasta\"<\/span>);<\/span>\r\n        bakeryList<\/span>.<\/span>add<\/span>(<\/span>\"garlic bread\"<\/span>);<\/span>\r\n        bakeryList<\/span>.<\/span>add<\/span>(<\/span>\"donuts\"<\/span>);<\/span>\r\n\r\n        ArrayList<\/span><<\/span>String<\/span>><\/span> produceList<\/span> =<\/span> new<\/span> ArrayList<\/span><>();<\/span>\r\n\r\n        produceList<\/span>.<\/span>add<\/span>(<\/span>\"tomatoes\"<\/span>);<\/span>\r\n        produceList<\/span>.<\/span>add<\/span>(<\/span>\"zucchini\"<\/span>);<\/span>\r\n        produceList<\/span>.<\/span>add<\/span>(<\/span>\"peppers\"<\/span>);<\/span>\r\n\r\n        ArrayList<\/span><<\/span>String<\/span>><\/span> drinksList<\/span> =<\/span> new<\/span> ArrayList<\/span><>();<\/span>\r\n\r\n        drinksList<\/span>.<\/span>add<\/span>(<\/span>\"soda\"<\/span>);<\/span>\r\n        drinksList<\/span>.<\/span>add<\/span>(<\/span>\"coffee\"<\/span>);<\/span>\r\n\r\n        groceryList<\/span>.<\/span>add<\/span>(<\/span>bakeryList<\/span>);<\/span>\r\n        groceryList<\/span>.<\/span>add<\/span>(<\/span>produceList<\/span>);<\/span>\r\n        groceryList<\/span>.<\/span>add<\/span>(<\/span>drinksList<\/span>);<\/span>\r\n\r\n        for<\/span> (<\/span>int<\/span> i<\/span> =<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> groceryList<\/span>.<\/span>size<\/span>();<\/span> i<\/span>++)<\/span> {<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>groceryList<\/span>.<\/span>get<\/span>(<\/span>i<\/span>));<\/span>\r\n\r\n        }<\/span>\r\n\r\n    }<\/span>\r\n\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4e8c\u7ef4\u6570\u7ec4\u548cfor-each\u5faa\u73af\u3002<\/p><\/blockquote>\n
import<\/span> java.util.ArrayList<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> Main<\/span> {<\/span>\r\n\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n\r\n        String<\/span>[]<\/span> animals<\/span> =<\/span> {<\/span> \"cat\"<\/span>,<\/span> \"dog\"<\/span>,<\/span> \"rat\"<\/span>,<\/span> \"bird\"<\/span> };<\/span>\r\n\r\n        for<\/span> (<\/span>String<\/span> animal<\/span> :<\/span> animals<\/span>)<\/span> {<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>animal<\/span>);<\/span>\r\n        }<\/span>\r\n\r\n        ArrayList<\/span><<\/span>String<\/span>><\/span> newAnimals<\/span> =<\/span> new<\/span> ArrayList<\/span><>();<\/span>\r\n\r\n        newAnimals<\/span>.<\/span>add<\/span>(<\/span>\"cat\"<\/span>);<\/span>\r\n        newAnimals<\/span>.<\/span>add<\/span>(<\/span>\"dog\"<\/span>);<\/span>\r\n        newAnimals<\/span>.<\/span>add<\/span>(<\/span>\"rat\"<\/span>);<\/span>\r\n        newAnimals<\/span>.<\/span>add<\/span>(<\/span>\"bird\"<\/span>);<\/span>\r\n\r\n        for<\/span> (<\/span>String<\/span> animal<\/span> :<\/span> newAnimals<\/span>)<\/span> {<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>animal<\/span>);<\/span>\r\n        }<\/span>\r\n\r\n    }<\/span>\r\n\r\n}<\/span>\r\n<\/code><\/pre>\n
Java\u6559\u7a0b<\/p>\n
\":white_check_mark:\"<\/p>\n","protected":false},"excerpt":{"rendered":"
\uff11\uff0c\u521b\u5efaArrayList\u7684\u65b9\u6cd5 \u278a\u98df\u7269\u5217\u8868 = \u65b0\u7684\u6570\u7ec4\u5217\u8868(); \uff12\uff0c\u6e90\u4ee3\u7801 \u4e00\u7ef4\u6570\u7ec4 import ja […]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-31020","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"\nJava\u7684ArrayList\u7c7b\u662fjava.util.ArrayList\u7c7b - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8eJava\u7684ArrayList\u7c7b\u662fjava.util.ArrayList\u7c7b\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\/java\u7684arraylist\u7c7b\u662fjava-util-arraylist\u7c7b\u3002\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java\u7684ArrayList\u7c7b\u662fjava.util.ArrayList\u7c7b\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8eJava\u7684ArrayList\u7c7b\u662fjava.util.ArrayList\u7c7b\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/java\u7684arraylist\u7c7b\u662fjava-util-arraylist\u7c7b\u3002\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-02-05T23:56:13+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-12T13:54:15+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d0a7c37434c4406be4349\/10-11.png\" \/>\n<meta name=\"author\" content=\"\u79d1, \u96c5\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u79d1, \u96c5\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84arraylist%e7%b1%bb%e6%98%afjava-util-arraylist%e7%b1%bb%e3%80%82\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84arraylist%e7%b1%bb%e6%98%afjava-util-arraylist%e7%b1%bb%e3%80%82\/\",\"name\":\"Java\u7684ArrayList\u7c7b\u662fjava.util.ArrayList\u7c7b - Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\"},\"datePublished\":\"2023-02-05T23:56:13+00:00\",\"dateModified\":\"2025-08-12T13:54:15+00:00\",\"author\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/41e222757cdd2a3365361328bd79970a\"},\"description\":\"\u5173\u4e8eJava\u7684ArrayList\u7c7b\u662fjava.util.ArrayList\u7c7b\u7684\u6280\u672f\u6587\u7ae0\",\"breadcrumb\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84arraylist%e7%b1%bb%e6%98%afjava-util-arraylist%e7%b1%bb%e3%80%82\/#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84arraylist%e7%b1%bb%e6%98%afjava-util-arraylist%e7%b1%bb%e3%80%82\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84arraylist%e7%b1%bb%e6%98%afjava-util-arraylist%e7%b1%bb%e3%80%82\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.silicloud.com\/zh\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Java\u7684ArrayList\u7c7b\u662fjava.util.ArrayList\u7c7b\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/\",\"name\":\"Blog - Silicon Cloud\",\"description\":\"\",\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/41e222757cdd2a3365361328bd79970a\",\"name\":\"\u79d1, \u96c5\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/1b2d3e00a7df03689797ebd4af8c5827ba5af936849a71050ec331f4cf902c5d?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/1b2d3e00a7df03689797ebd4af8c5827ba5af936849a71050ec331f4cf902c5d?s=96&d=mm&r=g\",\"caption\":\"\u79d1, \u96c5\"},\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/author\/keya\/\"},{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84arraylist%e7%b1%bb%e6%98%afjava-util-arraylist%e7%b1%bb%e3%80%82\/#local-main-organization-logo\",\"url\":\"\",\"contentUrl\":\"\",\"caption\":\"Blog - Silicon Cloud\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Java\u7684ArrayList\u7c7b\u662fjava.util.ArrayList\u7c7b - Blog - Silicon Cloud","description":"\u5173\u4e8eJava\u7684ArrayList\u7c7b\u662fjava.util.ArrayList\u7c7b\u7684\u6280\u672f\u6587\u7ae0","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/zh\/blog\/java\u7684arraylist\u7c7b\u662fjava-util-arraylist\u7c7b\u3002\/","og_locale":"zh_CN","og_type":"article","og_title":"Java\u7684ArrayList\u7c7b\u662fjava.util.ArrayList\u7c7b","og_description":"\u5173\u4e8eJava\u7684ArrayList\u7c7b\u662fjava.util.ArrayList\u7c7b\u7684\u6280\u672f\u6587\u7ae0","og_url":"https:\/\/www.silicloud.com\/zh\/blog\/java\u7684arraylist\u7c7b\u662fjava-util-arraylist\u7c7b\u3002\/","og_site_name":"Blog - Silicon Cloud","article_published_time":"2023-02-05T23:56:13+00:00","article_modified_time":"2025-08-12T13:54:15+00:00","og_image":[{"url":"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d0a7c37434c4406be4349\/10-11.png"}],"author":"\u79d1, \u96c5","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"\u79d1, \u96c5","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"1 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84arraylist%e7%b1%bb%e6%98%afjava-util-arraylist%e7%b1%bb%e3%80%82\/","url":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84arraylist%e7%b1%bb%e6%98%afjava-util-arraylist%e7%b1%bb%e3%80%82\/","name":"Java\u7684ArrayList\u7c7b\u662fjava.util.ArrayList\u7c7b - Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website"},"datePublished":"2023-02-05T23:56:13+00:00","dateModified":"2025-08-12T13:54:15+00:00","author":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/41e222757cdd2a3365361328bd79970a"},"description":"\u5173\u4e8eJava\u7684ArrayList\u7c7b\u662fjava.util.ArrayList\u7c7b\u7684\u6280\u672f\u6587\u7ae0","breadcrumb":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84arraylist%e7%b1%bb%e6%98%afjava-util-arraylist%e7%b1%bb%e3%80%82\/#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84arraylist%e7%b1%bb%e6%98%afjava-util-arraylist%e7%b1%bb%e3%80%82\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84arraylist%e7%b1%bb%e6%98%afjava-util-arraylist%e7%b1%bb%e3%80%82\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.silicloud.com\/zh\/blog\/"},{"@type":"ListItem","position":2,"name":"Java\u7684ArrayList\u7c7b\u662fjava.util.ArrayList\u7c7b"}]},{"@type":"WebSite","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website","url":"https:\/\/www.silicloud.com\/zh\/blog\/","name":"Blog - Silicon Cloud","description":"","inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/41e222757cdd2a3365361328bd79970a","name":"\u79d1, \u96c5","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/1b2d3e00a7df03689797ebd4af8c5827ba5af936849a71050ec331f4cf902c5d?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/1b2d3e00a7df03689797ebd4af8c5827ba5af936849a71050ec331f4cf902c5d?s=96&d=mm&r=g","caption":"\u79d1, \u96c5"},"url":"https:\/\/www.silicloud.com\/zh\/blog\/author\/keya\/"},{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84arraylist%e7%b1%bb%e6%98%afjava-util-arraylist%e7%b1%bb%e3%80%82\/#local-main-organization-logo","url":"","contentUrl":"","caption":"Blog - Silicon Cloud"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/31020","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/comments?post=31020"}],"version-history":[{"count":3,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/31020\/revisions"}],"predecessor-version":[{"id":111842,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/31020\/revisions\/111842"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/media?parent=31020"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/categories?post=31020"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/tags?post=31020"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}