{"id":39381,"date":"2024-11-26T17:16:47","date_gmt":"2024-11-26T09:16:47","guid":{"rendered":"https:\/\/fwq.ai\/blog\/39381\/"},"modified":"2024-11-26T17:16:47","modified_gmt":"2024-11-26T09:16:47","slug":"%e6%80%8e%e4%b9%88%e5%88%a0%e9%99%a4%e6%95%b0%e7%bb%84%e4%b8%ad%e7%9a%84%e6%95%b0%e6%8d%aejava","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/39381\/","title":{"rendered":"\u600e\u4e48\u5220\u9664\u6570\u7ec4\u4e2d\u7684\u6570\u636ejava"},"content":{"rendered":"

\n java \u4e2d\u5220\u9664\u6570\u7ec4\u5143\u7d20\u6709\u4e94\u79cd\u65b9\u6cd5\uff1a1. \u76f4\u63a5\u8d4b\u503c\u4e3a null\uff1b2. \u4f7f\u7528 system.arraycopy \u590d\u5236\u5143\u7d20\uff1b3. \u4f7f\u7528 arrays.copyofrange \u521b\u5efa\u65b0\u6570\u7ec4\uff1b4. \u4f7f\u7528 arraylist \u52a8\u6001\u8c03\u6574\u5927\u5c0f\uff1b5. \u4f7f\u7528 linkedlist \u53cc\u5411\u94fe\u8868\u9ad8\u6548\u63d2\u5165\u548c\u5220\u9664\u3002\n<\/p><\/blockquote>\n

\"\u600e\u4e48\u5220\u9664\u6570\u7ec4\u4e2d\u7684\u6570\u636ejava\u63d2\u56fe\"<\/p>\n

Java \u4e2d\u5220\u9664\u6570\u7ec4\u5143\u7d20\u7684\u65b9\u6cd5<\/strong><\/p>\n

\u76f4\u63a5\u8d4b\u503c\u4e3a null<\/strong><\/p>\n

\u6700\u7b80\u5355\u7684\u5220\u9664\u6570\u7ec4\u5143\u7d20\u7684\u65b9\u6cd5\u662f\u76f4\u63a5\u5c06\u5176\u8d4b\u503c\u4e3a null\u3002\u8fd9\u4f1a\u5c06\u8be5\u5143\u7d20\u4ece\u6570\u7ec4\u4e2d\u79fb\u9664\uff0c\u4f46\u4e0d\u4f1a\u6539\u53d8\u6570\u7ec4\u7684\u5927\u5c0f\u3002<\/p>\n

int[] arr = {1, 2, 3, 4, 5};\narr[2] = null; \/\/ \u5220\u9664\u7b2c 3 \u4e2a\u5143\u7d20<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4f7f\u7528 System.arraycopy<\/strong><\/p>\n
\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
System.arraycopy \u65b9\u6cd5\u53ef\u4ee5\u5c06\u6570\u7ec4\u7684\u4e00\u90e8\u5206\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\u3002\u901a\u8fc7\u4f7f\u7528\u6b64\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5c06\u6570\u7ec4\u4e2d\u8981\u5220\u9664\u7684\u5143\u7d20\u540e\u9762\u7684\u6240\u6709\u5143\u7d20\u79fb\u52a8\u5230\u65b0\u6570\u7ec4\u4e2d\uff0c\u4ece\u800c\u6709\u6548\u5730\u5220\u9664\u8be5\u5143\u7d20\u3002<\/p>\n
int[] arr = {1, 2, 3, 4, 5};\nint[] newArr = new int[arr.length - 1];\nSystem.arraycopy(arr, 0, newArr, 0, 2);\nSystem.arraycopy(arr, 3, newArr, 2, arr.length - 3); \/\/ \u5220\u9664\u7b2c 3 \u4e2a\u5143\u7d20<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4f7f\u7528 Arrays.copyOfRange<\/strong><\/p>\n
Arrays.copyOfRange \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u8be5\u6570\u7ec4\u662f\u539f\u59cb\u6570\u7ec4\u7684\u6307\u5b9a\u8303\u56f4\u5185\u7684\u526f\u672c\u3002\u901a\u8fc7\u4f7f\u7528\u6b64\u65b9\u6cd5\uff0c\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u4e0d\u5305\u542b\u8981\u5220\u9664\u5143\u7d20\u7684\u65b0\u6570\u7ec4\u3002<\/p>\n
int[] arr = {1, 2, 3, 4, 5};\nint[] newArr = Arrays.copyOfRange(arr, 0, 2); \/\/ \u5220\u9664\u7b2c 3 \u4e2a\u5143\u7d20<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4f7f\u7528 ArrayList<\/strong><\/p>\n
ArrayList \u662f Java \u4e2d\u4e00\u79cd\u52a8\u6001\u6570\u7ec4\u3002\u4e0e\u666e\u901a\u6570\u7ec4\u4e0d\u540c\uff0cArrayList \u53ef\u4ee5\u81ea\u52a8\u8c03\u6574\u5927\u5c0f\u4ee5\u9002\u5e94\u6dfb\u52a0\u6216\u5220\u9664\u5143\u7d20\u3002<\/p>\n
ArrayList<Integer> list = new ArrayList<>();\nlist.add(1);\nlist.add(2);\nlist.add(3);\nlist.add(4);\nlist.add(5);\nlist.remove(2); \/\/ \u5220\u9664\u7b2c 3 \u4e2a\u5143\u7d20<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4f7f\u7528 LinkedList<\/strong><\/p>\n
LinkedList \u662f\u4e00\u79cd\u53cc\u5411\u94fe\u8868\uff0c\u5176\u63d2\u5165\u548c\u5220\u9664\u64cd\u4f5c\u975e\u5e38\u9ad8\u6548\u3002<\/p>\n
LinkedList<Integer> list = new LinkedList<>();\nlist.add(1);\nlist.add(2);\nlist.add(3);\nlist.add(4);\nlist.add(5);\nlist.remove(2); \/\/ \u5220\u9664\u7b2c 3 \u4e2a\u5143\u7d20<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u600e\u4e48\u5220\u9664\u6570\u7ec4\u4e2d\u7684\u6570\u636ejava\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":"
java \u4e2d\u5220\u9664\u6570\u7ec4\u5143\u7d20\u6709\u4e94\u79cd\u65b9\u6cd5\uff1a1. \u76f4\u63a5\u8d4b\u503c\u4e3a null\uff1b2. \u4f7f\u7528 system.arraycopy \u590d\u5236\u5143\u7d20\uff1b3. \u4f7f\u7528 arrays.copyofrange \u521b\u5efa\u65b0\u6570\u7ec4\uff1b4. \u4f7f\u7528 arraylist \u52a8\u6001\u8c03\u6574\u5927\u5c0f\uff1b5. \u4f7f\u7528 linkedlist \u53cc\u5411\u94fe\u8868\u9ad8\u6548\u63d2\u5165\u548c\u5220\u9664\u3002 Java \u4e2d\u5220\u9664\u6570\u7ec4\u5143\u7d20\u7684\u65b9\u6cd5 \u76f4\u63a5\u8d4b\u503c\u4e3a null \u6700\u7b80\u5355\u7684\u5220\u9664\u6570\u7ec4\u5143\u7d20\u7684\u65b9\u6cd5\u662f\u76f4\u63a5\u5c06\u5176\u8d4b\u503c\u4e3a null\u3002\u8fd9\u4f1a\u5c06\u8be5\u5143\u7d20\u4ece\u6570\u7ec4\u4e2d\u79fb\u9664\uff0c\u4f46\u4e0d\u4f1a\u6539\u53d8\u6570\u7ec4\u7684\u5927\u5c0f\u3002 int[] arr = {1, 2, 3, 4, 5}; arr[2] = null; \/\/ \u5220\u9664\u7b2c 3 \u4e2a\u5143\u7d20 \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528 System.arraycopy \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b System.arraycopy \u65b9\u6cd5\u53ef\u4ee5\u5c06\u6570\u7ec4\u7684\u4e00\u90e8\u5206\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\u3002\u901a\u8fc7\u4f7f\u7528\u6b64\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5c06\u6570\u7ec4\u4e2d\u8981\u5220\u9664\u7684\u5143\u7d20\u540e\u9762\u7684\u6240\u6709\u5143\u7d20\u79fb\u52a8\u5230\u65b0\u6570\u7ec4\u4e2d\uff0c\u4ece\u800c\u6709\u6548\u5730\u5220\u9664\u8be5\u5143\u7d20\u3002 int[] arr = {1, 2, 3, 4, 5}; int[] newArr = new […]<\/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-39381","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39381","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=39381"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39381\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=39381"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=39381"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=39381"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}