{"id":66849,"date":"2025-05-03T09:05:44","date_gmt":"2025-05-03T01:05:44","guid":{"rendered":"https:\/\/fwq.ai\/blog\/66849\/"},"modified":"2025-05-03T09:05:44","modified_gmt":"2025-05-03T01:05:44","slug":"java%e4%b8%ad%e6%80%8e%e4%b9%88%e7%bb%99%e7%b1%bb%e4%b8%ad%e7%9a%84%e6%95%b0%e7%bb%84%e8%b5%8b%e5%80%bc-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/66849\/","title":{"rendered":"Java\u4e2d\u600e\u4e48\u7ed9\u7c7b\u4e2d\u7684\u6570\u7ec4\u8d4b\u503c"},"content":{"rendered":"<blockquote><p>\n  java \u4e2d\u7ed9\u7c7b\u4e2d\u7684\u6570\u7ec4\u8d4b\u503c\u6709\u4e24\u79cd\u65b9\u6cd5\uff1a\u901a\u8fc7\u6784\u9020\u5668\u5b9e\u4f8b\u5316\u5bf9\u8c61\u65f6\u521d\u59cb\u5316\u6570\u7ec4\u6216\u901a\u8fc7\u6570\u7ec4\u8d4b\u503c\u8bed\u53e5\u7ed9\u5b9e\u4f8b\u5316\u7684\u5bf9\u8c61\u8d4b\u503c\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/17\/2024111712243018025.jpg\" class=\"aligncenter\" title=\"Java\u4e2d\u600e\u4e48\u7ed9\u7c7b\u4e2d\u7684\u6570\u7ec4\u8d4b\u503c\u63d2\u56fe\" alt=\"Java\u4e2d\u600e\u4e48\u7ed9\u7c7b\u4e2d\u7684\u6570\u7ec4\u8d4b\u503c\u63d2\u56fe\" \/><\/p>\n<p><strong>Java\u4e2d\u7ed9\u7c7b\u4e2d\u7684\u6570\u7ec4\u8d4b\u503c<\/strong><\/p>\n<p>\u5728Java\u4e2d\uff0c\u7ed9\u7c7b\u4e2d\u7684\u6570\u7ec4\u8d4b\u503c\u53ef\u4ee5\u901a\u8fc7\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\uff1a<\/p>\n<p><strong>1. \u6784\u9020\u5668<\/strong><\/p>\n<p>\u5728\u7c7b\u7684\u6784\u9020\u5668\u4e2d\uff0c\u53ef\u4ee5\u5728\u5b9e\u4f8b\u5316\u5bf9\u8c61\u65f6\u521d\u59cb\u5316\u6570\u7ec4\u3002\u4f8b\u5982\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>public class MyClass {\n    private int[] arr;\n\n    public MyClass(int[] arr) {\n        this.arr = arr;\n    }\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u6570\u7ec4\u8d4b\u503c\u8bed\u53e5<\/strong><\/p>\n<p>\u4e00\u65e6\u5b9e\u4f8b\u5316\u4e86\u4e00\u4e2a\u5bf9\u8c61\uff0c\u53ef\u4ee5\u901a\u8fc7\u6570\u7ec4\u8d4b\u503c\u8bed\u53e5\u7ed9\u5b83\u7684\u6570\u7ec4\u8d4b\u503c\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>MyClass obj = new MyClass();\nobj.arr = new int[]{1, 2, 3}; \/\/ \u901a\u8fc7\u5f15\u7528\u8d4b\u503c<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u8be6\u7ec6\u8bf4\u660e\uff1a<\/strong><\/p>\n<ul>\n<li> <strong>\u901a\u8fc7\u5f15\u7528\u8d4b\u503c\uff1a<\/strong>\u4f7f\u7528\u6570\u7ec4\u8d4b\u503c\u8bed\u53e5\u65f6\uff0c\u4f1a\u5c06\u6570\u7ec4\u7684\u5f15\u7528\u8d4b\u7ed9\u5bf9\u8c61\u4e2d\u7684\u6570\u7ec4\u53d8\u91cf\u3002\u8fd9\u610f\u5473\u7740\u4efb\u4f55\u5bf9\u6570\u7ec4\u5143\u7d20\u7684\u4fee\u6539\u90fd\u5c06\u5728\u539f\u59cb\u6570\u7ec4\u4e2d\u53cd\u6620\u51fa\u6765\u3002<\/li>\n<li> <strong>\u521b\u5efa\u65b0\u6570\u7ec4\uff1a<\/strong>\u5982\u679c\u5e0c\u671b\u5728\u7c7b\u4e2d\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528 new \u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0cint[] arr = new int[5]; \u5c06\u521b\u5efa\u4e00\u4e2a\u957f\u5ea6\u4e3a5\u7684\u6574\u578b\u6570\u7ec4\u3002<\/li>\n<li> <strong>\u591a\u7ef4\u6570\u7ec4\uff1a<\/strong>\u5bf9\u4e8e\u591a\u7ef4\u6570\u7ec4\uff0c\u4f7f\u7528\u7c7b\u4f3c\u7684\u8bed\u6cd5\u3002\u4f8b\u5982\uff0cint[][] arr = new int[2][3]; \u5c06\u521b\u5efa\u4e00\u4e2a\u5305\u542b2\u884c3\u5217\u7684\u6574\u6570\u6570\u7ec4\u3002<\/li>\n<li> <strong>\u6570\u7ec4\u521d\u59cb\u5316\uff1a<\/strong>\u5728\u58f0\u660e\u6570\u7ec4\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u5927\u62ec\u53f7\u6765\u521d\u59cb\u5316\u5176\u5143\u7d20\u3002\u4f8b\u5982\uff0cint[] arr = {1, 2, 3}; \u521d\u59cb\u5316\u4e86\u4e00\u4e2a\u5305\u542b\u4e09\u4e2a\u5143\u7d20\u7684\u6570\u7ec4\u3002<\/li>\n<li> <strong>\u6570\u7ec4\u590d\u5236\uff1a<\/strong>\u8981\u5c06\u4e00\u4e2a\u6570\u7ec4\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u3002\u4f8b\u5982\uff0cint[] copy = Arrays.copyOf(arr, arr.length); \u5c06\u521b\u5efa\u4e00\u4e2a\u4e0e arr \u76f8\u540c\u957f\u5ea6\u7684\u6570\u7ec4\u5e76\u590d\u5236\u5176\u5143\u7d20\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fJava\u4e2d\u600e\u4e48\u7ed9\u7c7b\u4e2d\u7684\u6570\u7ec4\u8d4b\u503c\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>java \u4e2d\u7ed9\u7c7b\u4e2d\u7684\u6570\u7ec4\u8d4b\u503c\u6709\u4e24\u79cd\u65b9\u6cd5\uff1a\u901a\u8fc7\u6784\u9020\u5668\u5b9e\u4f8b\u5316\u5bf9\u8c61\u65f6\u521d\u59cb\u5316\u6570\u7ec4\u6216\u901a\u8fc7\u6570\u7ec4\u8d4b\u503c\u8bed\u53e5\u7ed9\u5b9e\u4f8b\u5316\u7684\u5bf9\u8c61\u8d4b\u503c\u3002 Java\u4e2d\u7ed9\u7c7b\u4e2d\u7684\u6570\u7ec4\u8d4b\u503c \u5728Java\u4e2d\uff0c\u7ed9\u7c7b\u4e2d\u7684\u6570\u7ec4\u8d4b\u503c\u53ef\u4ee5\u901a\u8fc7\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\uff1a 1. \u6784\u9020\u5668 \u5728\u7c7b\u7684\u6784\u9020\u5668\u4e2d\uff0c\u53ef\u4ee5\u5728\u5b9e\u4f8b\u5316\u5bf9\u8c61\u65f6\u521d\u59cb\u5316\u6570\u7ec4\u3002\u4f8b\u5982\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b public class MyClass { private int[] arr; public MyClass(int[] arr) { this.arr = arr; } } \u767b\u5f55\u540e\u590d\u5236 2. \u6570\u7ec4\u8d4b\u503c\u8bed\u53e5 \u4e00\u65e6\u5b9e\u4f8b\u5316\u4e86\u4e00\u4e2a\u5bf9\u8c61\uff0c\u53ef\u4ee5\u901a\u8fc7\u6570\u7ec4\u8d4b\u503c\u8bed\u53e5\u7ed9\u5b83\u7684\u6570\u7ec4\u8d4b\u503c\u3002\u4f8b\u5982\uff1a MyClass obj = new MyClass(); obj.arr = new int[]{1, 2, 3}; \/\/ \u901a\u8fc7\u5f15\u7528\u8d4b\u503c \u767b\u5f55\u540e\u590d\u5236 \u8be6\u7ec6\u8bf4\u660e\uff1a \u901a\u8fc7\u5f15\u7528\u8d4b\u503c\uff1a\u4f7f\u7528\u6570\u7ec4\u8d4b\u503c\u8bed\u53e5\u65f6\uff0c\u4f1a\u5c06\u6570\u7ec4\u7684\u5f15\u7528\u8d4b\u7ed9\u5bf9\u8c61\u4e2d\u7684\u6570\u7ec4\u53d8\u91cf\u3002\u8fd9\u610f\u5473\u7740\u4efb\u4f55\u5bf9\u6570\u7ec4\u5143\u7d20\u7684\u4fee\u6539\u90fd\u5c06\u5728\u539f\u59cb\u6570\u7ec4\u4e2d\u53cd\u6620\u51fa\u6765\u3002 \u521b\u5efa\u65b0\u6570\u7ec4\uff1a\u5982\u679c\u5e0c\u671b\u5728\u7c7b\u4e2d\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528 new \u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0cint[] arr = new int[5]; \u5c06\u521b\u5efa\u4e00\u4e2a\u957f\u5ea6\u4e3a5\u7684\u6574\u578b\u6570\u7ec4\u3002 \u591a\u7ef4\u6570\u7ec4\uff1a\u5bf9\u4e8e\u591a\u7ef4\u6570\u7ec4\uff0c\u4f7f\u7528\u7c7b\u4f3c\u7684\u8bed\u6cd5\u3002\u4f8b\u5982\uff0cint[][] arr = [&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-66849","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66849","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=66849"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66849\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=66849"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=66849"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=66849"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}