{"id":65595,"date":"2025-05-03T11:16:54","date_gmt":"2025-05-03T03:16:54","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65595\/"},"modified":"2025-05-03T11:16:54","modified_gmt":"2025-05-03T03:16:54","slug":"java%e6%95%b0%e7%bb%84%e6%9c%aa%e7%9f%a5%e9%95%bf%e5%ba%a6%e6%80%8e%e4%b9%88%e5%ae%9a%e4%b9%89-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/65595\/","title":{"rendered":"java\u6570\u7ec4\u672a\u77e5\u957f\u5ea6\u600e\u4e48\u5b9a\u4e49"},"content":{"rendered":"<blockquote><p>\n  \u5728 java \u4e2d\u5b9a\u4e49\u672a\u77e5\u957f\u5ea6\u6570\u7ec4\u6709\u4e09\u79cd\u6280\u5de7\uff1a\u4f7f\u7528 arraylist\uff08\u53ef\u53d8\u957f\u5ea6\u6570\u7ec4\uff0c\u52a8\u6001\u589e\u52a0\u6216\u51cf\u5c11\u5927\u5c0f\uff09\uff1b\u4f7f\u7528 object \u6570\u7ec4\uff08\u7279\u6b8a\u6570\u7ec4\uff0c\u5b58\u50a8\u4efb\u610f\u7c7b\u578b\u5bf9\u8c61\uff09\uff1b\u521b\u5efa\u81ea\u5b9a\u4e49\u52a8\u6001\u6570\u7ec4\u7c7b\uff08\u5305\u542b\u5185\u90e8\u6570\u7ec4\u548c\u52a8\u6001\u8c03\u6574\u5927\u5c0f\u7684\u65b9\u6cd5\uff09\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/13\/2024111304514124941.jpg\" class=\"aligncenter\" title=\"java\u6570\u7ec4\u672a\u77e5\u957f\u5ea6\u600e\u4e48\u5b9a\u4e49\u63d2\u56fe\" alt=\"java\u6570\u7ec4\u672a\u77e5\u957f\u5ea6\u600e\u4e48\u5b9a\u4e49\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u4e2d\u5b9a\u4e49\u672a\u77e5\u957f\u5ea6\u6570\u7ec4\u7684\u6280\u5de7<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u6570\u7ec4\u7684\u957f\u5ea6\u5fc5\u987b\u5728\u7f16\u8bd1\u65f6\u786e\u5b9a\u3002\u4f46\u662f\uff0c\u6709\u65f6\u5019\u6211\u4eec\u53ef\u80fd\u9700\u8981\u5b9a\u4e49\u4e00\u4e2a\u957f\u5ea6\u672a\u77e5\u7684\u6570\u7ec4\uff0c\u6bd4\u5982\u4ece\u7528\u6237\u8f93\u5165\u4e2d\u83b7\u53d6\u6570\u636e\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6280\u5de7\uff1a<\/p>\n<p><strong>1. \u4f7f\u7528 ArrayList<\/strong><\/p>\n<p>ArrayList \u662f Java \u96c6\u5408\u6846\u67b6\u4e2d\u7684\u4e00\u79cd\u53ef\u53d8\u957f\u5ea6\u6570\u7ec4\u3002\u5b83\u53ef\u4ee5\u52a8\u6001\u5730\u589e\u52a0\u6216\u51cf\u5c11\u5176\u5927\u5c0f\u3002\u8981\u5b9a\u4e49\u4e00\u4e2a\u672a\u77e5\u957f\u5ea6\u7684 ArrayList\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>ArrayList&lt;\u6570\u636e\u7c7b\u578b&gt; \u6570\u7ec4\u540d = new ArrayList&lt;&gt;();<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u4f7f\u7528 Object \u6570\u7ec4<\/strong><\/p>\n<p>Object \u6570\u7ec4\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u6570\u7ec4\uff0c\u5b83\u53ef\u4ee5\u5b58\u50a8\u4efb\u4f55\u7c7b\u578b\u7684\u5bf9\u8c61\u3002\u6211\u4eec\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a Object \u6570\u7ec4\u6765\u5b58\u50a8\u957f\u5ea6\u672a\u77e5\u7684\u6570\u636e\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>Object[] \u6570\u7ec4\u540d = new Object[\u521d\u59cb\u5bb9\u91cf];<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u521d\u59cb\u5bb9\u91cf\u662f\u6307\u6570\u7ec4\u6700\u521d\u521b\u5efa\u65f6\u7684\u957f\u5ea6\u3002\u5b83\u53ef\u4ee5\u6839\u636e\u9700\u8981\u8fdb\u884c\u8c03\u6574\u3002<\/p>\n<p><strong>3. \u4f7f\u7528\u81ea\u5b9a\u4e49\u52a8\u6001\u6570\u7ec4<\/strong><\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u81ea\u5df1\u7684\u52a8\u6001\u6570\u7ec4\u7c7b\u6765\u5b9e\u73b0\u672a\u77e5\u957f\u5ea6\u6570\u7ec4\u7684\u529f\u80fd\u3002\u8be5\u7c7b\u53ef\u4ee5\u5305\u542b\u4e00\u4e2a\u5185\u90e8\u6570\u7ec4\u548c\u4e00\u4e9b\u65b9\u6cd5\u6765\u52a8\u6001\u589e\u52a0\u6216\u51cf\u5c11\u6570\u7ec4\u7684\u5927\u5c0f\u3002<\/p>\n<p><strong>\u793a\u4f8b<\/strong><\/p>\n<p>\u4f7f\u7528 ArrayList \u5b9a\u4e49\u4e00\u4e2a\u672a\u77e5\u957f\u5ea6\u7684\u6570\u7ec4\uff1a<\/p>\n<pre>import java.util.ArrayList;\n\npublic class Main {\n    public static void main(String[] args) {\n        ArrayList&lt;Integer&gt; numbers = new ArrayList&lt;&gt;();\n\n        \/\/ \u6dfb\u52a0\u5143\u7d20\u5230\u6570\u7ec4\n        numbers.add(10);\n        numbers.add(20);\n        numbers.add(30);\n\n        \/\/ \u904d\u5386\u6570\u7ec4\n        for (int number : numbers) {\n            System.out.println(number);\n        }\n    }\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0cArrayList \u7684\u957f\u5ea6\u5728\u7f16\u8bd1\u65f6\u662f\u672a\u77e5\u7684\u3002\u5b83\u4f1a\u5728\u8fd0\u884c\u65f6\u6839\u636e\u9700\u8981\u8fdb\u884c\u8c03\u6574\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4\u672a\u77e5\u957f\u5ea6\u600e\u4e48\u5b9a\u4e49\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 java \u4e2d\u5b9a\u4e49\u672a\u77e5\u957f\u5ea6\u6570\u7ec4\u6709\u4e09\u79cd\u6280\u5de7\uff1a\u4f7f\u7528 arraylist\uff08\u53ef\u53d8\u957f\u5ea6\u6570\u7ec4\uff0c\u52a8\u6001\u589e\u52a0\u6216\u51cf\u5c11\u5927\u5c0f\uff09\uff1b\u4f7f\u7528 object \u6570\u7ec4\uff08\u7279\u6b8a\u6570\u7ec4\uff0c\u5b58\u50a8\u4efb\u610f\u7c7b\u578b\u5bf9\u8c61\uff09\uff1b\u521b\u5efa\u81ea\u5b9a\u4e49\u52a8\u6001\u6570\u7ec4\u7c7b\uff08\u5305\u542b\u5185\u90e8\u6570\u7ec4\u548c\u52a8\u6001\u8c03\u6574\u5927\u5c0f\u7684\u65b9\u6cd5\uff09\u3002 Java \u4e2d\u5b9a\u4e49\u672a\u77e5\u957f\u5ea6\u6570\u7ec4\u7684\u6280\u5de7 \u5728 Java \u4e2d\uff0c\u6570\u7ec4\u7684\u957f\u5ea6\u5fc5\u987b\u5728\u7f16\u8bd1\u65f6\u786e\u5b9a\u3002\u4f46\u662f\uff0c\u6709\u65f6\u5019\u6211\u4eec\u53ef\u80fd\u9700\u8981\u5b9a\u4e49\u4e00\u4e2a\u957f\u5ea6\u672a\u77e5\u7684\u6570\u7ec4\uff0c\u6bd4\u5982\u4ece\u7528\u6237\u8f93\u5165\u4e2d\u83b7\u53d6\u6570\u636e\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6280\u5de7\uff1a 1. \u4f7f\u7528 ArrayList ArrayList \u662f Java \u96c6\u5408\u6846\u67b6\u4e2d\u7684\u4e00\u79cd\u53ef\u53d8\u957f\u5ea6\u6570\u7ec4\u3002\u5b83\u53ef\u4ee5\u52a8\u6001\u5730\u589e\u52a0\u6216\u51cf\u5c11\u5176\u5927\u5c0f\u3002\u8981\u5b9a\u4e49\u4e00\u4e2a\u672a\u77e5\u957f\u5ea6\u7684 ArrayList\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b ArrayList&lt;\u6570\u636e\u7c7b\u578b&gt; \u6570\u7ec4\u540d = new ArrayList&lt;&gt;(); \u767b\u5f55\u540e\u590d\u5236 2. \u4f7f\u7528 Object \u6570\u7ec4 Object \u6570\u7ec4\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u6570\u7ec4\uff0c\u5b83\u53ef\u4ee5\u5b58\u50a8\u4efb\u4f55\u7c7b\u578b\u7684\u5bf9\u8c61\u3002\u6211\u4eec\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a Object \u6570\u7ec4\u6765\u5b58\u50a8\u957f\u5ea6\u672a\u77e5\u7684\u6570\u636e\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a Object[] \u6570\u7ec4\u540d = new Object[\u521d\u59cb\u5bb9\u91cf]; \u767b\u5f55\u540e\u590d\u5236 \u521d\u59cb\u5bb9\u91cf\u662f\u6307\u6570\u7ec4\u6700\u521d\u521b\u5efa\u65f6\u7684\u957f\u5ea6\u3002\u5b83\u53ef\u4ee5\u6839\u636e\u9700\u8981\u8fdb\u884c\u8c03\u6574\u3002 3. \u4f7f\u7528\u81ea\u5b9a\u4e49\u52a8\u6001\u6570\u7ec4 \u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u81ea\u5df1\u7684\u52a8\u6001\u6570\u7ec4\u7c7b\u6765\u5b9e\u73b0\u672a\u77e5\u957f\u5ea6\u6570\u7ec4\u7684\u529f\u80fd\u3002\u8be5\u7c7b\u53ef\u4ee5\u5305\u542b\u4e00\u4e2a\u5185\u90e8\u6570\u7ec4\u548c\u4e00\u4e9b\u65b9\u6cd5\u6765\u52a8\u6001\u589e\u52a0\u6216\u51cf\u5c11\u6570\u7ec4\u7684\u5927\u5c0f\u3002 \u793a\u4f8b \u4f7f\u7528 ArrayList \u5b9a\u4e49\u4e00\u4e2a\u672a\u77e5\u957f\u5ea6\u7684\u6570\u7ec4\uff1a import java.util.ArrayList; public class Main { public [&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-65595","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65595","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=65595"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65595\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=65595"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=65595"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=65595"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}