{"id":39184,"date":"2024-11-26T13:26:52","date_gmt":"2024-11-26T05:26:52","guid":{"rendered":"https:\/\/fwq.ai\/blog\/39184\/"},"modified":"2024-11-26T13:26:52","modified_gmt":"2024-11-26T05:26:52","slug":"java%e6%80%8e%e4%b9%88%e5%9c%a8%e6%95%b0%e7%bb%84%e4%b8%ad%e6%b7%bb%e5%8a%a0%e5%85%83%e7%b4%a0","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/39184\/","title":{"rendered":"java\u600e\u4e48\u5728\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20"},"content":{"rendered":"

\n \u5982\u4f55\u5411 java \u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\uff1a\u4f7f\u7528 java \u96c6\u5408\u7c7b\uff08\u4f8b\u5982 arraylist\uff09\u5b9e\u73b0\u52a8\u6001\u6dfb\u52a0\u3002\u521b\u5efa\u65b0\u6570\u7ec4\u5e76\u590d\u5236\u65e7\u6570\u7ec4\u5143\u7d20\uff0c\u7136\u540e\u6dfb\u52a0\u65b0\u5143\u7d20\u3002\u4f7f\u7528 system.arraycopy() \u65b9\u6cd5\u590d\u5236\u6570\u7ec4\u5143\u7d20\u5e76\u6dfb\u52a0\u65b0\u5143\u7d20\u3002\n<\/p><\/blockquote>\n

\"java\u600e\u4e48\u5728\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\u63d2\u56fe\"<\/p>\n

Java\u4e2d\u5728\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20<\/h2>\n

Java\u4e2d\u6570\u7ec4\u662f\u56fa\u5b9a\u957f\u5ea6\u7684\uff0c\u5373\u521b\u5efa\u540e\u65e0\u6cd5\u6539\u53d8\u5176\u5927\u5c0f\u3002\u4f46\u662f\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u5728\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\uff1a<\/p>\n

1. \u4f7f\u7528Java\u96c6\u5408\u7c7b<\/strong><\/p>\n

Java\u63d0\u4f9b\u4e86\u5404\u79cd\u96c6\u5408\u7c7b\uff0c\u4f8b\u5982ArrayList\u548cLinkedList\uff0c\u5b83\u4eec\u5141\u8bb8\u52a8\u6001\u6dfb\u52a0\u548c\u5220\u9664\u5143\u7d20\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u4f7f\u7528ArrayList\u5728\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\uff1a<\/p>\n

int[] arr = {1, 2, 3};\nList<Integer> list = new ArrayList<>(Arrays.asList(arr));\nlist.add(4);\n\/\/ \u8f6c\u6362\u6210\u6570\u7ec4\narr = list.toArray(new Integer[list.size()]);<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
2. \u521b\u5efa\u65b0\u7684\u6570\u7ec4<\/strong><\/p>\n
\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\uff0c\u5e76\u5c06\u5176\u5143\u7d20\u4ece\u65e7\u6570\u7ec4\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\uff0c\u7136\u540e\u6dfb\u52a0\u65b0\u5143\u7d20\u3002<\/p>\n
int[] arr = {1, 2, 3};\nint[] newArr = new int[arr.length + 1];\nfor (int i = 0; i < arr.length; i++) {\n    newArr[i] = arr[i];\n}\nnewArr[arr.length] = 4;<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
3. \u4f7f\u7528System.arraycopy()\u65b9\u6cd5<\/strong><\/p>\n
System.arraycopy()\u65b9\u6cd5\u53ef\u4ee5\u5c06\u6570\u7ec4\u7684\u4e00\u90e8\u5206\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\u4e2d\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u5728\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\uff1a<\/p>\n
int[] arr = {1, 2, 3};\nint[] newArr = new int[arr.length + 1];\nSystem.arraycopy(arr, 0, newArr, 0, arr.length);\nnewArr[arr.length] = 4;<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u5728\u6570\u7ec4\u4e2d\u6dfb\u52a0\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":"
\u5982\u4f55\u5411 java \u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\uff1a\u4f7f\u7528 java \u96c6\u5408\u7c7b\uff08\u4f8b\u5982 arraylist\uff09\u5b9e\u73b0\u52a8\u6001\u6dfb\u52a0\u3002\u521b\u5efa\u65b0\u6570\u7ec4\u5e76\u590d\u5236\u65e7\u6570\u7ec4\u5143\u7d20\uff0c\u7136\u540e\u6dfb\u52a0\u65b0\u5143\u7d20\u3002\u4f7f\u7528 system.arraycopy() \u65b9\u6cd5\u590d\u5236\u6570\u7ec4\u5143\u7d20\u5e76\u6dfb\u52a0\u65b0\u5143\u7d20\u3002 Java\u4e2d\u5728\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20 Java\u4e2d\u6570\u7ec4\u662f\u56fa\u5b9a\u957f\u5ea6\u7684\uff0c\u5373\u521b\u5efa\u540e\u65e0\u6cd5\u6539\u53d8\u5176\u5927\u5c0f\u3002\u4f46\u662f\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u5728\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\uff1a 1. \u4f7f\u7528Java\u96c6\u5408\u7c7b Java\u63d0\u4f9b\u4e86\u5404\u79cd\u96c6\u5408\u7c7b\uff0c\u4f8b\u5982ArrayList\u548cLinkedList\uff0c\u5b83\u4eec\u5141\u8bb8\u52a8\u6001\u6dfb\u52a0\u548c\u5220\u9664\u5143\u7d20\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u4f7f\u7528ArrayList\u5728\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\uff1a int[] arr = {1, 2, 3}; List<Integer> list = new ArrayList<>(Arrays.asList(arr)); list.add(4); \/\/ \u8f6c\u6362\u6210\u6570\u7ec4 arr = list.toArray(new Integer[list.size()]); \u767b\u5f55\u540e\u590d\u5236 2. \u521b\u5efa\u65b0\u7684\u6570\u7ec4 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\uff0c\u5e76\u5c06\u5176\u5143\u7d20\u4ece\u65e7\u6570\u7ec4\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\uff0c\u7136\u540e\u6dfb\u52a0\u65b0\u5143\u7d20\u3002 int[] arr = {1, 2, 3}; int[] newArr = new int[arr.length + 1]; for (int i = 0; i […]<\/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-39184","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39184","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=39184"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39184\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=39184"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=39184"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=39184"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}