{"id":39842,"date":"2024-11-26T13:05:41","date_gmt":"2024-11-26T05:05:41","guid":{"rendered":"https:\/\/fwq.ai\/blog\/39842\/"},"modified":"2024-11-26T13:05:41","modified_gmt":"2024-11-26T05:05:41","slug":"java%e6%80%8e%e4%b9%88%e4%b8%8d%e6%8c%87%e5%ae%9a%e6%95%b0%e7%bb%84%e4%b8%ad%e7%9a%84%e9%95%bf%e5%ba%a6","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/39842\/","title":{"rendered":"JAVA\u600e\u4e48\u4e0d\u6307\u5b9a\u6570\u7ec4\u4e2d\u7684\u957f\u5ea6"},"content":{"rendered":"<blockquote><p>\n  java \u4e2d\u7684\u6570\u7ec4\u901a\u5e38\u9700\u8981\u6307\u5b9a\u957f\u5ea6\uff0c\u4f46\u53ef\u4ee5\u901a\u8fc7\u52a8\u6001\u6570\u7ec4\u6216\u53ef\u53d8\u957f\u5ea6\u6570\u7ec4\u7ed5\u8fc7\u6b64\u9650\u5236\u3002\u52a8\u6001\u6570\u7ec4 (arraylist)\uff1aarraylist \u662f\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\u7c7b\uff0c\u65e0\u9700\u9884\u5148\u6307\u5b9a\u5927\u5c0f\uff0c\u53ef\u4ee5\u968f\u7740\u6dfb\u52a0\u5143\u7d20\u800c\u81ea\u52a8\u589e\u957f\u3002\u53ef\u53d8\u957f\u5ea6\u6570\u7ec4 (\u6570\u7ec4\u521d\u59cb\u5316\u8bed\u6cd5)\uff1ajava 9 \u4e2d\u5f15\u5165\uff0c\u5141\u8bb8\u521b\u5efa\u53ef\u53d8\u957f\u5ea6\u6570\u7ec4\uff0c\u4e0d\u9700\u8981\u5728\u7f16\u8bd1\u65f6\u6307\u5b9a\u957f\u5ea6\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/17\/2024111711152652282.jpg\" class=\"aligncenter\" title=\"JAVA\u600e\u4e48\u4e0d\u6307\u5b9a\u6570\u7ec4\u4e2d\u7684\u957f\u5ea6\u63d2\u56fe\" alt=\"JAVA\u600e\u4e48\u4e0d\u6307\u5b9a\u6570\u7ec4\u4e2d\u7684\u957f\u5ea6\u63d2\u56fe\" \/><\/p>\n<p><strong>\u65e0\u9700\u6307\u5b9a\u6570\u7ec4\u957f\u5ea6\u7684 Java<\/strong><\/p>\n<p>Java \u4e2d\u7684\u6570\u7ec4\u901a\u5e38\u9700\u8981\u6307\u5b9a\u5176\u957f\u5ea6\u3002\u4f46\u662f\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u52a8\u6001\u6570\u7ec4\u6216\u53ef\u53d8\u957f\u5ea6\u6570\u7ec4\u6765\u7ed5\u8fc7\u6b64\u9650\u5236\u3002<\/p>\n<p><strong>\u52a8\u6001\u6570\u7ec4 (ArrayList)<\/strong><\/p>\n<p>ArrayList \u662f Java \u4e2d\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\u7c7b\u3002\u5b83\u4f7f\u7528 Java \u96c6\u5408\u6846\u67b6\u6765\u5b9e\u73b0\uff0c\u5e76\u63d0\u4f9b\u4e86\u8bb8\u591a\u6709\u7528\u7684\u65b9\u6cd5\uff0c\u5982\u5927\u5c0f\u8c03\u6574\u3001\u8ffd\u52a0\u548c\u5220\u9664\u5143\u7d20\u3002\u4e0e\u5e38\u89c4\u6570\u7ec4\u4e0d\u540c\uff0cArrayList \u65e0\u9700\u9884\u5148\u6307\u5b9a\u5927\u5c0f\uff0c\u5e76\u4e14\u53ef\u4ee5\u968f\u7740\u6dfb\u52a0\u5143\u7d20\u800c\u81ea\u52a8\u589e\u957f\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>import java.util.ArrayList;\n\npublic class DynamicArrayExample {\n    public static void main(String[] args) {\n        \/\/ \u521b\u5efa\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\uff0c\u65e0\u9700\u6307\u5b9a\u957f\u5ea6\n        ArrayList&lt;Integer&gt; numbers = new ArrayList&lt;&gt;();\n\n        \/\/ \u5411\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\n        numbers.add(10);\n        numbers.add(20);\n        numbers.add(30);\n\n        \/\/ \u8bbf\u95ee\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\n        System.out.println(numbers.get(1)); \/\/ \u8f93\u51fa\uff1a20\n    }\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u53ef\u53d8\u957f\u5ea6\u6570\u7ec4 (\u6570\u7ec4\u521d\u59cb\u5316\u8bed\u6cd5)<\/strong><\/p>\n<p>Java 9 \u5f15\u5165\u4e86\u6570\u7ec4\u521d\u59cb\u5316\u8bed\u6cd5\uff0c\u5141\u8bb8\u521b\u5efa\u53ef\u53d8\u957f\u5ea6\u6570\u7ec4\u3002\u8fd9\u4e9b\u6570\u7ec4\u4e0e\u5e38\u89c4\u6570\u7ec4\u7c7b\u4f3c\uff0c\u4f46\u4e0d\u9700\u8981\u5728\u7f16\u8bd1\u65f6\u6307\u5b9a\u957f\u5ea6\u3002<\/p>\n<pre>int[] numbers = { 10, 20, 30 };<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u901a\u8fc7\u4f7f\u7528\u52a8\u6001\u6570\u7ec4\u6216\u53ef\u53d8\u957f\u5ea6\u6570\u7ec4\uff0c\u53ef\u4ee5\u907f\u514d\u5728\u521b\u5efa\u6570\u7ec4\u65f6\u6307\u5b9a\u5176\u957f\u5ea6\u3002\u8fd9\u5728\u8bb8\u591a\u60c5\u51b5\u4e0b\u975e\u5e38\u6709\u7528\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li>\u5f53\u60a8\u4e0d\u786e\u5b9a\u6570\u7ec4\u5c06\u5305\u542b\u591a\u5c11\u5143\u7d20\u65f6<\/li>\n<li>\u5f53\u60a8\u9700\u8981\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u6dfb\u52a0\u6216\u5220\u9664\u5143\u7d20\u65f6<\/li>\n<li>\u5f53\u60a8\u60f3\u9ad8\u6548\u5730\u4f7f\u7528\u5185\u5b58\u65f6\uff08\u56e0\u4e3a\u52a8\u6001\u6570\u7ec4\u4e0d\u4f1a\u9884\u5148\u5206\u914d\u5185\u5b58\uff09<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fJAVA\u600e\u4e48\u4e0d\u6307\u5b9a\u6570\u7ec4\u4e2d\u7684\u957f\u5ea6\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\u7684\u6570\u7ec4\u901a\u5e38\u9700\u8981\u6307\u5b9a\u957f\u5ea6\uff0c\u4f46\u53ef\u4ee5\u901a\u8fc7\u52a8\u6001\u6570\u7ec4\u6216\u53ef\u53d8\u957f\u5ea6\u6570\u7ec4\u7ed5\u8fc7\u6b64\u9650\u5236\u3002\u52a8\u6001\u6570\u7ec4 (arraylist)\uff1aarraylist \u662f\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\u7c7b\uff0c\u65e0\u9700\u9884\u5148\u6307\u5b9a\u5927\u5c0f\uff0c\u53ef\u4ee5\u968f\u7740\u6dfb\u52a0\u5143\u7d20\u800c\u81ea\u52a8\u589e\u957f\u3002\u53ef\u53d8\u957f\u5ea6\u6570\u7ec4 (\u6570\u7ec4\u521d\u59cb\u5316\u8bed\u6cd5)\uff1ajava 9 \u4e2d\u5f15\u5165\uff0c\u5141\u8bb8\u521b\u5efa\u53ef\u53d8\u957f\u5ea6\u6570\u7ec4\uff0c\u4e0d\u9700\u8981\u5728\u7f16\u8bd1\u65f6\u6307\u5b9a\u957f\u5ea6\u3002 \u65e0\u9700\u6307\u5b9a\u6570\u7ec4\u957f\u5ea6\u7684 Java Java \u4e2d\u7684\u6570\u7ec4\u901a\u5e38\u9700\u8981\u6307\u5b9a\u5176\u957f\u5ea6\u3002\u4f46\u662f\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u52a8\u6001\u6570\u7ec4\u6216\u53ef\u53d8\u957f\u5ea6\u6570\u7ec4\u6765\u7ed5\u8fc7\u6b64\u9650\u5236\u3002 \u52a8\u6001\u6570\u7ec4 (ArrayList) ArrayList \u662f Java \u4e2d\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\u7c7b\u3002\u5b83\u4f7f\u7528 Java \u96c6\u5408\u6846\u67b6\u6765\u5b9e\u73b0\uff0c\u5e76\u63d0\u4f9b\u4e86\u8bb8\u591a\u6709\u7528\u7684\u65b9\u6cd5\uff0c\u5982\u5927\u5c0f\u8c03\u6574\u3001\u8ffd\u52a0\u548c\u5220\u9664\u5143\u7d20\u3002\u4e0e\u5e38\u89c4\u6570\u7ec4\u4e0d\u540c\uff0cArrayList \u65e0\u9700\u9884\u5148\u6307\u5b9a\u5927\u5c0f\uff0c\u5e76\u4e14\u53ef\u4ee5\u968f\u7740\u6dfb\u52a0\u5143\u7d20\u800c\u81ea\u52a8\u589e\u957f\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b import java.util.ArrayList; public class DynamicArrayExample { public static void main(String[] args) { \/\/ \u521b\u5efa\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\uff0c\u65e0\u9700\u6307\u5b9a\u957f\u5ea6 ArrayList&lt;Integer&gt; numbers = new ArrayList&lt;&gt;(); \/\/ \u5411\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20 numbers.add(10); numbers.add(20); numbers.add(30); \/\/ \u8bbf\u95ee\u6570\u7ec4\u4e2d\u7684\u5143\u7d20 System.out.println(numbers.get(1)); \/\/ \u8f93\u51fa\uff1a20 } } \u767b\u5f55\u540e\u590d\u5236 \u53ef\u53d8\u957f\u5ea6\u6570\u7ec4 (\u6570\u7ec4\u521d\u59cb\u5316\u8bed\u6cd5) [&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-39842","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39842","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=39842"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39842\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=39842"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=39842"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=39842"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}