{"id":66705,"date":"2025-05-03T08:44:20","date_gmt":"2025-05-03T00:44:20","guid":{"rendered":"https:\/\/fwq.ai\/blog\/66705\/"},"modified":"2025-05-03T08:44:20","modified_gmt":"2025-05-03T00:44:20","slug":"java%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e6%8f%90%e9%ab%98%e5%ad%98%e5%82%a8%e6%95%b0%e6%8d%ae%e9%87%8f-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/66705\/","title":{"rendered":"java\u6570\u7ec4\u600e\u4e48\u63d0\u9ad8\u5b58\u50a8\u6570\u636e\u91cf"},"content":{"rendered":"

\n java\u6570\u7ec4\u5927\u5c0f\u56fa\u5b9a\uff0c\u53ef\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u589e\u5927\u5b58\u50a8\u5bb9\u91cf\uff1a\u521b\u5efa\u66f4\u5927\u6570\u7ec4\uff0c\u590d\u5236\u539f\u6570\u7ec4\u5143\u7d20\u3002\u4f7f\u7528arraylist\uff0c\u52a8\u6001\u8c03\u6574\u5927\u5c0f\u3002\u4f7f\u7528linkedlist\uff0c\u4f18\u5316\u9891\u7e41\u63d2\u5165\u548c\u5220\u9664\u3002\u4f7f\u7528system.arraycopy\uff0c\u6269\u5c55\u6570\u7ec4\u90e8\u5206\u6216\u5168\u90e8\u3002\n<\/p><\/blockquote>\n

\"java\u6570\u7ec4\u600e\u4e48\u63d0\u9ad8\u5b58\u50a8\u6570\u636e\u91cf\u63d2\u56fe\"<\/p>\n

\u589e\u5927\u6570\u7ec4\u5b58\u50a8\u5bb9\u91cf\u7684\u65b9\u6cd5<\/strong><\/p>\n

Java\u4e2d\u7684\u6570\u7ec4\u662f\u4e00\u4e2a\u56fa\u5b9a\u957f\u5ea6\u7684\u6570\u636e\u7ed3\u6784\uff0c\u8fd9\u610f\u5473\u7740\u4e00\u65e6\u521b\u5efa\uff0c\u5c31\u4e0d\u80fd\u6539\u53d8\u5176\u5927\u5c0f\u3002\u7136\u800c\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u6765\u6709\u6548\u5730\u63d0\u9ad8\u6570\u7ec4\u5b58\u50a8\u5bb9\u91cf\uff1a<\/p>\n

1. \u521b\u5efa\u4e00\u4e2a\u66f4\u5927\u7684\u6570\u7ec4<\/strong><\/p>\n

\u6700\u76f4\u63a5\u7684\u65b9\u6cd5\u662f\u521b\u5efa\u4e00\u4e2a\u66f4\u5927\u7684\u6570\u7ec4\uff0c\u7136\u540e\u5c06\u539f\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u590d\u5236\u5230\u65b0\u7684\u6570\u7ec4\u4e2d\u3002<\/p>\n

\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n

int[] oldArray = {1, 2, 3, 4, 5};\nint[] newArray = new int[10];\n\nSystem.arraycopy(oldArray, 0, newArray, 0, oldArray.length);<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
2. \u4f7f\u7528ArrayList<\/strong><\/p>\n
ArrayList\u662f\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\uff0c\u5b83\u53ef\u4ee5\u81ea\u52a8\u589e\u957f\u4ee5\u5bb9\u7eb3\u66f4\u591a\u5143\u7d20\u3002\u8981\u5c06\u6570\u7ec4\u8f6c\u6362\u4e3aArrayList\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
ArrayList<Integer> arrayList = new ArrayList<>(Arrays.asList(oldArray));<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
3. \u4f7f\u7528LinkedList<\/strong><\/p>\n
LinkedList\u4e5f\u662f\u4e00\u79cd\u52a8\u6001\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u6bd4ArrayList\u66f4\u9002\u5408\u9891\u7e41\u7684\u63d2\u5165\u548c\u5220\u9664\u64cd\u4f5c\u3002\u8981\u5c06\u6570\u7ec4\u8f6c\u6362\u4e3aLinkedList\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
LinkedList<Integer> linkedList = new LinkedList<>();\nfor (int i : oldArray) {\n    linkedList.add(i);\n}<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
4. \u4f7f\u7528System.arraycopy<\/strong><\/p>\n
System.arraycopy\u65b9\u6cd5\u53ef\u4ee5\u5c06\u4e00\u4e2a\u6570\u7ec4\u7684\u90e8\u5206\u6216\u5168\u90e8\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\u4e2d\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u5b83\u6765\u6269\u5c55\u6570\u7ec4\u7684\u5927\u5c0f\uff1a<\/p>\n
int[] newArray = new int[oldArray.length + 5];\nSystem.arraycopy(oldArray, 0, newArray, 0, oldArray.length);<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5<\/strong><\/p>\n
\u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\u53d6\u51b3\u4e8e\u5177\u4f53\u60c5\u51b5\u3002\u5982\u679c\u6570\u7ec4\u662f\u9759\u6001\u7684\uff0c\u5e76\u4e14\u53ea\u9700\u8981\u4e00\u6b21\u6027\u6269\u5c55\uff0c\u5219\u521b\u5efa\u66f4\u5927\u7684\u6570\u7ec4\u6216\u4f7f\u7528System.arraycopy\u662f\u5408\u9002\u7684\u3002\u5982\u679c\u6570\u7ec4\u662f\u52a8\u6001\u7684\uff0c\u5219\u4f7f\u7528ArrayList\u6216LinkedList\u53ef\u4ee5\u63d0\u4f9b\u66f4\u7075\u6d3b\u548c\u9ad8\u6548\u7684\u5b58\u50a8\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4\u600e\u4e48\u63d0\u9ad8\u5b58\u50a8\u6570\u636e\u91cf\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
java\u6570\u7ec4\u5927\u5c0f\u56fa\u5b9a\uff0c\u53ef\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u589e\u5927\u5b58\u50a8\u5bb9\u91cf\uff1a\u521b\u5efa\u66f4\u5927\u6570\u7ec4\uff0c\u590d\u5236\u539f\u6570\u7ec4\u5143\u7d20\u3002\u4f7f\u7528arraylist\uff0c\u52a8\u6001\u8c03\u6574\u5927\u5c0f\u3002\u4f7f\u7528linkedlist\uff0c\u4f18\u5316\u9891\u7e41\u63d2\u5165\u548c\u5220\u9664\u3002\u4f7f\u7528system.arraycopy\uff0c\u6269\u5c55\u6570\u7ec4\u90e8\u5206\u6216\u5168\u90e8\u3002 \u589e\u5927\u6570\u7ec4\u5b58\u50a8\u5bb9\u91cf\u7684\u65b9\u6cd5 Java\u4e2d\u7684\u6570\u7ec4\u662f\u4e00\u4e2a\u56fa\u5b9a\u957f\u5ea6\u7684\u6570\u636e\u7ed3\u6784\uff0c\u8fd9\u610f\u5473\u7740\u4e00\u65e6\u521b\u5efa\uff0c\u5c31\u4e0d\u80fd\u6539\u53d8\u5176\u5927\u5c0f\u3002\u7136\u800c\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u6765\u6709\u6548\u5730\u63d0\u9ad8\u6570\u7ec4\u5b58\u50a8\u5bb9\u91cf\uff1a 1. \u521b\u5efa\u4e00\u4e2a\u66f4\u5927\u7684\u6570\u7ec4 \u6700\u76f4\u63a5\u7684\u65b9\u6cd5\u662f\u521b\u5efa\u4e00\u4e2a\u66f4\u5927\u7684\u6570\u7ec4\uff0c\u7136\u540e\u5c06\u539f\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u590d\u5236\u5230\u65b0\u7684\u6570\u7ec4\u4e2d\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[] oldArray = {1, 2, 3, 4, 5}; int[] newArray = new int[10]; System.arraycopy(oldArray, 0, newArray, 0, oldArray.length); \u767b\u5f55\u540e\u590d\u5236 2. \u4f7f\u7528ArrayList ArrayList\u662f\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\uff0c\u5b83\u53ef\u4ee5\u81ea\u52a8\u589e\u957f\u4ee5\u5bb9\u7eb3\u66f4\u591a\u5143\u7d20\u3002\u8981\u5c06\u6570\u7ec4\u8f6c\u6362\u4e3aArrayList\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a ArrayList<Integer> arrayList = new ArrayList<>(Arrays.asList(oldArray)); \u767b\u5f55\u540e\u590d\u5236 3. \u4f7f\u7528LinkedList LinkedList\u4e5f\u662f\u4e00\u79cd\u52a8\u6001\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u6bd4ArrayList\u66f4\u9002\u5408\u9891\u7e41\u7684\u63d2\u5165\u548c\u5220\u9664\u64cd\u4f5c\u3002\u8981\u5c06\u6570\u7ec4\u8f6c\u6362\u4e3aLinkedList\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a LinkedList<Integer> linkedList = new LinkedList<>(); for (int i : oldArray) { linkedList.add(i); } \u767b\u5f55\u540e\u590d\u5236 4. \u4f7f\u7528System.arraycopy System.arraycopy\u65b9\u6cd5\u53ef\u4ee5\u5c06\u4e00\u4e2a\u6570\u7ec4\u7684\u90e8\u5206\u6216\u5168\u90e8\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\u4e2d\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u5b83\u6765\u6269\u5c55\u6570\u7ec4\u7684\u5927\u5c0f\uff1a […]<\/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-66705","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66705","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=66705"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66705\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=66705"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=66705"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=66705"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}