{"id":38799,"date":"2024-11-26T17:09:58","date_gmt":"2024-11-26T09:09:58","guid":{"rendered":"https:\/\/fwq.ai\/blog\/38799\/"},"modified":"2024-11-26T17:09:58","modified_gmt":"2024-11-26T09:09:58","slug":"java%e6%80%8e%e4%b9%88%e5%90%91%e6%95%b0%e7%bb%84%e4%b8%ad%e6%b7%bb%e5%8a%a0%e6%95%b0%e6%8d%ae","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/38799\/","title":{"rendered":"java\u600e\u4e48\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u6570\u636e"},"content":{"rendered":"<blockquote><p>\n  \u5728 java \u4e2d\uff0c\u5411\u6570\u7ec4\u6dfb\u52a0\u6570\u636e\u6709\u4e24\u79cd\u65b9\u6cd5\uff1a\u4f7f\u7528\u6570\u7ec4\u521d\u59cb\u5316\u5668\u6216\u4f7f\u7528 arrays.copyof() \u65b9\u6cd5\u3002\u524d\u8005\u901a\u8fc7\u5927\u62ec\u53f7\u521d\u59cb\u5316\uff0c\u540e\u8005\u901a\u8fc7\u521b\u5efa\u4e00\u4e2a\u5305\u542b\u65b0\u5143\u7d20\u7684\u65b0\u6570\u7ec4\u6765\u5b9e\u73b0\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/15\/2024111506430310406.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u6570\u636e\u63d2\u56fe\" alt=\"java\u600e\u4e48\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u6570\u636e\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5411 Java \u6570\u7ec4\u4e2d\u6dfb\u52a0\u6570\u636e<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u6570\u636e\u6709\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\uff1a<\/p>\n<p><strong>1. \u4f7f\u7528\u6570\u7ec4\u521d\u59cb\u5316\u5668<\/strong><\/p>\n<ul>\n<li>\u4f7f\u7528\u4e00\u5bf9\u5927\u62ec\u53f7 {}\uff0c\u5c06\u521d\u59cb\u503c\u5217\u8868\u653e\u5728\u6570\u7ec4\u58f0\u660e\u540e\u9762\u3002<\/li>\n<li>\u521d\u59cb\u503c\u5217\u8868\u4ee5\u9017\u53f7\u5206\u9694\u3002<\/li>\n<li>\u4f8b\u5982\uff1aint[] numbers = {1, 2, 3};<\/li>\n<\/ul>\n<p><strong>2. \u4f7f\u7528\u6570\u7ec4\u65b9\u6cd5<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<ul>\n<li>Java \u63d0\u4f9b\u4e86\u51e0\u4e2a\u6570\u7ec4\u65b9\u6cd5\u6765\u64cd\u4f5c\u6570\u7ec4\uff0c\u5305\u62ec length\u3001clone() \u548c fill()\u3002<\/li>\n<li>\u8981\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u3002<\/li>\n<li>\u6b64\u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u957f\u5ea6\u6bd4\u539f\u59cb\u6570\u7ec4\u5927\uff0c\u5e76\u5305\u542b\u539f\u59cb\u5143\u7d20\u53ca\u5176\u65b0\u5143\u7d20\u3002<\/li>\n<li>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre>int[] numbers = {1, 2, 3};\nint[] newNumbers = Arrays.copyOf(numbers, numbers.length + 1);\nnewNumbers[newNumbers.length - 1] = 4; \/\/ \u6dfb\u52a0\u65b0\u5143\u7d20<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<\/ul>\n<p><strong>\u793a\u4f8b\u4ee3\u7801<\/strong><\/p>\n<p>\u4e0b\u9762\u7684\u793a\u4f8b\u4ee3\u7801\u6f14\u793a\u4e86\u8fd9\u4e24\u79cd\u65b9\u6cd5\uff1a<\/p>\n<pre>\/\/ \u4f7f\u7528\u6570\u7ec4\u521d\u59cb\u5316\u5668\nint[] numbers1 = {1, 2, 3};\n\n\/\/ \u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\nint[] numbers2 = new int[numbers1.length + 1];\nSystem.arraycopy(numbers1, 0, numbers2, 0, numbers1.length);\nnumbers2[numbers2.length - 1] = 4;\n\n\/\/ \u8f93\u51fa\u6570\u7ec4\nSystem.out.println(\"\u6570\u7ec4 1\uff1a\");\nfor (int num : numbers1) {\n    System.out.print(num + \" \");\n}\n\nSystem.out.println(\"\n\u6570\u7ec4 2\uff1a\");\nfor (int num : numbers2) {\n    System.out.print(num + \" \");\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u6ce8\u610f\uff1a<\/strong><\/p>\n<ul>\n<li>\u4e00\u65e6\u6570\u7ec4\u521b\u5efa\uff0c\u5176\u957f\u5ea6\u5c31\u4e0d\u80fd\u66f4\u6539\u3002<\/li>\n<li>\u5982\u679c\u9700\u8981\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u66f4\u591a\u5143\u7d20\uff0c\u5219\u53ef\u4ee5\u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u521b\u5efa\u65b0\u6570\u7ec4\uff0c\u8be5\u65b0\u6570\u7ec4\u5305\u542b\u539f\u59cb\u6570\u7ec4\u7684\u5143\u7d20\u4ee5\u53ca\u65b0\u5143\u7d20\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u6570\u636e\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>\u5728 java \u4e2d\uff0c\u5411\u6570\u7ec4\u6dfb\u52a0\u6570\u636e\u6709\u4e24\u79cd\u65b9\u6cd5\uff1a\u4f7f\u7528\u6570\u7ec4\u521d\u59cb\u5316\u5668\u6216\u4f7f\u7528 arrays.copyof() \u65b9\u6cd5\u3002\u524d\u8005\u901a\u8fc7\u5927\u62ec\u53f7\u521d\u59cb\u5316\uff0c\u540e\u8005\u901a\u8fc7\u521b\u5efa\u4e00\u4e2a\u5305\u542b\u65b0\u5143\u7d20\u7684\u65b0\u6570\u7ec4\u6765\u5b9e\u73b0\u3002 \u5982\u4f55\u5411 Java \u6570\u7ec4\u4e2d\u6dfb\u52a0\u6570\u636e \u5728 Java \u4e2d\uff0c\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u6570\u636e\u6709\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\uff1a 1. \u4f7f\u7528\u6570\u7ec4\u521d\u59cb\u5316\u5668 \u4f7f\u7528\u4e00\u5bf9\u5927\u62ec\u53f7 {}\uff0c\u5c06\u521d\u59cb\u503c\u5217\u8868\u653e\u5728\u6570\u7ec4\u58f0\u660e\u540e\u9762\u3002 \u521d\u59cb\u503c\u5217\u8868\u4ee5\u9017\u53f7\u5206\u9694\u3002 \u4f8b\u5982\uff1aint[] numbers = {1, 2, 3}; 2. \u4f7f\u7528\u6570\u7ec4\u65b9\u6cd5 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b Java \u63d0\u4f9b\u4e86\u51e0\u4e2a\u6570\u7ec4\u65b9\u6cd5\u6765\u64cd\u4f5c\u6570\u7ec4\uff0c\u5305\u62ec length\u3001clone() \u548c fill()\u3002 \u8981\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u3002 \u6b64\u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u957f\u5ea6\u6bd4\u539f\u59cb\u6570\u7ec4\u5927\uff0c\u5e76\u5305\u542b\u539f\u59cb\u5143\u7d20\u53ca\u5176\u65b0\u5143\u7d20\u3002 \u4f8b\u5982\uff1a int[] numbers = {1, 2, 3}; int[] newNumbers = Arrays.copyOf(numbers, numbers.length + 1); newNumbers[newNumbers.length &#8211; 1] = 4; \/\/ \u6dfb\u52a0\u65b0\u5143\u7d20 [&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-38799","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/38799","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=38799"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/38799\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=38799"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=38799"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=38799"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}