{"id":40216,"date":"2024-11-26T14:51:52","date_gmt":"2024-11-26T06:51:52","guid":{"rendered":"https:\/\/fwq.ai\/blog\/40216\/"},"modified":"2024-11-26T14:51:52","modified_gmt":"2024-11-26T06:51:52","slug":"java%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e5%8e%bb%e6%8e%89%e5%85%b6%e4%b8%ad%e4%b8%80%e4%b8%aa%e5%85%83%e7%b4%a0","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/40216\/","title":{"rendered":"java\u6570\u7ec4\u600e\u4e48\u53bb\u6389\u5176\u4e2d\u4e00\u4e2a\u5143\u7d20"},"content":{"rendered":"<blockquote><p>\n  java\u4e2d\u5220\u9664\u6570\u7ec4\u5143\u7d20\u7684\u65b9\u6cd5\u6709\u4e24\u79cd\uff1a\u4f7f\u7528 arrays.copyof() \u65b9\u6cd5\uff0c\u901a\u8fc7\u6307\u5b9a\u8d77\u59cb\u548c\u7ed3\u675f\u7d22\u5f15\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u6307\u5b9a\u5143\u7d20\u7684\u65b0\u6570\u7ec4\u3002\u4f7f\u7528 system.arraycopy() \u65b9\u6cd5\uff0c\u901a\u8fc7\u6307\u5b9a\u6e90\u6570\u7ec4\u548c\u76ee\u6807\u6570\u7ec4\u7684\u8d77\u59cb\u7d22\u5f15\u4ee5\u53ca\u8981\u590d\u5236\u7684\u5143\u7d20\u6570\u6765\u5220\u9664\u5143\u7d20\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/17\/2024111723012098315.jpg\" class=\"aligncenter\" title=\"java\u6570\u7ec4\u600e\u4e48\u53bb\u6389\u5176\u4e2d\u4e00\u4e2a\u5143\u7d20\u63d2\u56fe\" alt=\"java\u6570\u7ec4\u600e\u4e48\u53bb\u6389\u5176\u4e2d\u4e00\u4e2a\u5143\u7d20\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u4e2d\u5220\u9664\u6570\u7ec4\u5143\u7d20\u7684\u65b9\u6cd5<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u5220\u9664\u6570\u7ec4\u5143\u7d20\u6709\u591a\u79cd\u65b9\u6cd5\u3002\u4ee5\u4e0b\u5217\u51fa\u4e86\u4e24\u79cd\u6700\u5e38\u7528\u7684\u65b9\u6cd5\uff1a<\/p>\n<p><strong>1. \u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5<\/strong><\/p>\n<p>Arrays.copyOf() \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u8be5\u6570\u7ec4\u5305\u542b\u539f\u6570\u7ec4\u7684\u6307\u5b9a\u5143\u7d20\u3002\u53ef\u4ee5\u901a\u8fc7\u6307\u5b9a\u65b0\u6570\u7ec4\u7684\u8d77\u59cb\u7d22\u5f15\u548c\u7ed3\u675f\u7d22\u5f15\u6765\u5220\u9664\u5143\u7d20\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p><strong>\u8bed\u6cd5\uff1a<\/strong><\/p>\n<pre>int[] newArr = Arrays.copyOf(arr, newLength);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u7528\u6cd5\uff1a<\/strong><\/p>\n<pre>int[] arr = {1, 2, 3, 4, 5};\nint[] newArr = Arrays.copyOf(arr, arr.length - 1); \/\/ \u5220\u9664\u6700\u540e\u4e00\u4e2a\u5143\u7d20<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u4f7f\u7528 System.arraycopy() \u65b9\u6cd5<\/strong><\/p>\n<p>System.arraycopy() \u65b9\u6cd5\u5c06\u6307\u5b9a\u6e90\u6570\u7ec4\u7684\u4e00\u90e8\u5206\u590d\u5236\u5230\u76ee\u6807\u6570\u7ec4\u4e2d\u3002\u53ef\u4ee5\u901a\u8fc7\u6307\u5b9a\u6e90\u6570\u7ec4\u7684\u8d77\u59cb\u7d22\u5f15\u3001\u76ee\u6807\u6570\u7ec4\u7684\u8d77\u59cb\u7d22\u5f15\u548c\u8981\u590d\u5236\u7684\u5143\u7d20\u6570\u6765\u5220\u9664\u5143\u7d20\u3002<\/p>\n<p><strong>\u8bed\u6cd5\uff1a<\/strong><\/p>\n<pre>System.arraycopy(srcArr, srcPos, destArr, destPos, length);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u7528\u6cd5\uff1a<\/strong><\/p>\n<pre>int[] arr = {1, 2, 3, 4, 5};\nint[] newArr = new int[arr.length - 1];\nSystem.arraycopy(arr, 0, newArr, 0, newArr.length); \/\/ \u5220\u9664\u6700\u540e\u4e00\u4e2a\u5143\u7d20<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4\u600e\u4e48\u53bb\u6389\u5176\u4e2d\u4e00\u4e2a\u5143\u7d20\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\u5220\u9664\u6570\u7ec4\u5143\u7d20\u7684\u65b9\u6cd5\u6709\u4e24\u79cd\uff1a\u4f7f\u7528 arrays.copyof() \u65b9\u6cd5\uff0c\u901a\u8fc7\u6307\u5b9a\u8d77\u59cb\u548c\u7ed3\u675f\u7d22\u5f15\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u6307\u5b9a\u5143\u7d20\u7684\u65b0\u6570\u7ec4\u3002\u4f7f\u7528 system.arraycopy() \u65b9\u6cd5\uff0c\u901a\u8fc7\u6307\u5b9a\u6e90\u6570\u7ec4\u548c\u76ee\u6807\u6570\u7ec4\u7684\u8d77\u59cb\u7d22\u5f15\u4ee5\u53ca\u8981\u590d\u5236\u7684\u5143\u7d20\u6570\u6765\u5220\u9664\u5143\u7d20\u3002 Java \u4e2d\u5220\u9664\u6570\u7ec4\u5143\u7d20\u7684\u65b9\u6cd5 \u5728 Java \u4e2d\uff0c\u5220\u9664\u6570\u7ec4\u5143\u7d20\u6709\u591a\u79cd\u65b9\u6cd5\u3002\u4ee5\u4e0b\u5217\u51fa\u4e86\u4e24\u79cd\u6700\u5e38\u7528\u7684\u65b9\u6cd5\uff1a 1. \u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5 Arrays.copyOf() \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u8be5\u6570\u7ec4\u5305\u542b\u539f\u6570\u7ec4\u7684\u6307\u5b9a\u5143\u7d20\u3002\u53ef\u4ee5\u901a\u8fc7\u6307\u5b9a\u65b0\u6570\u7ec4\u7684\u8d77\u59cb\u7d22\u5f15\u548c\u7ed3\u675f\u7d22\u5f15\u6765\u5220\u9664\u5143\u7d20\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u8bed\u6cd5\uff1a int[] newArr = Arrays.copyOf(arr, newLength); \u767b\u5f55\u540e\u590d\u5236 \u7528\u6cd5\uff1a int[] arr = {1, 2, 3, 4, 5}; int[] newArr = Arrays.copyOf(arr, arr.length &#8211; 1); \/\/ \u5220\u9664\u6700\u540e\u4e00\u4e2a\u5143\u7d20 \u767b\u5f55\u540e\u590d\u5236 2. \u4f7f\u7528 System.arraycopy() \u65b9\u6cd5 System.arraycopy() \u65b9\u6cd5\u5c06\u6307\u5b9a\u6e90\u6570\u7ec4\u7684\u4e00\u90e8\u5206\u590d\u5236\u5230\u76ee\u6807\u6570\u7ec4\u4e2d\u3002\u53ef\u4ee5\u901a\u8fc7\u6307\u5b9a\u6e90\u6570\u7ec4\u7684\u8d77\u59cb\u7d22\u5f15\u3001\u76ee\u6807\u6570\u7ec4\u7684\u8d77\u59cb\u7d22\u5f15\u548c\u8981\u590d\u5236\u7684\u5143\u7d20\u6570\u6765\u5220\u9664\u5143\u7d20\u3002 \u8bed\u6cd5\uff1a System.arraycopy(srcArr, srcPos, destArr, destPos, length); [&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-40216","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/40216","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=40216"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/40216\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=40216"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=40216"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=40216"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}