{"id":65573,"date":"2025-05-03T09:24:23","date_gmt":"2025-05-03T01:24:23","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65573\/"},"modified":"2025-05-03T09:24:23","modified_gmt":"2025-05-03T01:24:23","slug":"java%e6%80%8e%e4%b9%88%e8%ae%a9%e6%95%b0%e7%bb%84%e5%89%8d%e7%a7%bb-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/65573\/","title":{"rendered":"java\u600e\u4e48\u8ba9\u6570\u7ec4\u524d\u79fb"},"content":{"rendered":"

\n \u901a\u8fc7\u4f7f\u7528 system.arraycopy() \u65b9\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u6570\u7ec4\u524d\u79fb\uff0c\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1a\u8bbe\u7f6e\u6e90\u6570\u7ec4\u7684\u8d77\u59cb\u4f4d\u7f6e\u4e3a\u8981\u524d\u79fb\u7684\u5143\u7d20\u6570\u91cf\u3002\u5c06\u76ee\u6807\u6570\u7ec4\u7684\u8d77\u59cb\u4f4d\u7f6e\u8bbe\u7f6e\u4e3a 0\u3002\u8bbe\u7f6e\u8981\u590d\u5236\u7684\u5143\u7d20\u6570\u91cf\u4e3a\u6570\u7ec4\u7684\u957f\u5ea6\u3002\n<\/p><\/blockquote>\n

\"java\u600e\u4e48\u8ba9\u6570\u7ec4\u524d\u79fb\u63d2\u56fe\"<\/p>\n

Java \u4e2d\u5982\u4f55\u5c06\u6570\u7ec4\u524d\u79fb<\/strong><\/p>\n

\u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528 System.arraycopy() \u65b9\u6cd5\u5c06\u6570\u7ec4\u524d\u79fb\u3002\u8be5\u65b9\u6cd5\u5177\u6709\u4ee5\u4e0b\u8bed\u6cd5\uff1a<\/p>\n

public static void arraycopy(Object src, int srcPos, Object dest, int destPos, int length)<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5176\u4e2d\uff1a<\/p>\n
    \n
  • src \u662f\u6e90\u6570\u7ec4<\/li>\n
  • srcPos \u662f\u6e90\u6570\u7ec4\u7684\u8d77\u59cb\u4f4d\u7f6e<\/li>\n
  • dest \u662f\u76ee\u6807\u6570\u7ec4<\/li>\n
  • destPos \u662f\u76ee\u6807\u6570\u7ec4\u7684\u8d77\u59cb\u4f4d\u7f6e<\/li>\n
  • length \u662f\u8981\u590d\u5236\u7684\u5143\u7d20\u6570\u91cf<\/li>\n<\/ul>\n
    \u8981\u5c06\u6570\u7ec4\u524d\u79fb\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06 srcPos \u8bbe\u7f6e\u4e3a\u8981\u524d\u79fb\u7684\u5143\u7d20\u6570\u91cf\uff0c\u5c06 destPos \u8bbe\u7f6e\u4e3a 0\uff0c\u7136\u540e\u5c06 length \u8bbe\u7f6e\u4e3a\u6570\u7ec4\u7684\u957f\u5ea6\u3002<\/p>\n
    \u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
    \u4ee5\u4e0b\u793a\u4f8b\u6f14\u793a\u4e86\u5982\u4f55\u5c06\u6570\u7ec4 arr \u524d\u79fb 2 \u4e2a\u5143\u7d20\uff1a<\/p>\n
    int[] arr = {1, 2, 3, 4, 5};\nint[] newArr = new int[arr.length];\n\nSystem.arraycopy(arr, 2, newArr, 0, arr.length - 2);\n\nfor (int i = 0; i < newArr.length; i++) {\n  System.out.println(newArr[i]);\n}<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u8f93\u51fa\uff1a<\/p>\n
    3\n4\n5<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u901a\u8fc7\u4f7f\u7528 System.arraycopy() \u65b9\u6cd5\uff0c\u6211\u4eec\u6210\u529f\u5730\u5c06\u6570\u7ec4 arr \u524d\u79fb\u4e86 2 \u4e2a\u5143\u7d20\u3002<\/p>\n
    \u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u8ba9\u6570\u7ec4\u524d\u79fb\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u901a\u8fc7\u4f7f\u7528 system.arraycopy() \u65b9\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u6570\u7ec4\u524d\u79fb\uff0c\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1a\u8bbe\u7f6e\u6e90\u6570\u7ec4\u7684\u8d77\u59cb\u4f4d\u7f6e\u4e3a\u8981\u524d\u79fb\u7684\u5143\u7d20\u6570\u91cf\u3002\u5c06\u76ee\u6807\u6570\u7ec4\u7684\u8d77\u59cb\u4f4d\u7f6e\u8bbe\u7f6e\u4e3a 0\u3002\u8bbe\u7f6e\u8981\u590d\u5236\u7684\u5143\u7d20\u6570\u91cf\u4e3a\u6570\u7ec4\u7684\u957f\u5ea6\u3002 Java \u4e2d\u5982\u4f55\u5c06\u6570\u7ec4\u524d\u79fb \u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528 System.arraycopy() \u65b9\u6cd5\u5c06\u6570\u7ec4\u524d\u79fb\u3002\u8be5\u65b9\u6cd5\u5177\u6709\u4ee5\u4e0b\u8bed\u6cd5\uff1a public static void arraycopy(Object src, int srcPos, Object dest, int destPos, int length) \u767b\u5f55\u540e\u590d\u5236 \u5176\u4e2d\uff1a src \u662f\u6e90\u6570\u7ec4 srcPos \u662f\u6e90\u6570\u7ec4\u7684\u8d77\u59cb\u4f4d\u7f6e dest \u662f\u76ee\u6807\u6570\u7ec4 destPos \u662f\u76ee\u6807\u6570\u7ec4\u7684\u8d77\u59cb\u4f4d\u7f6e length \u662f\u8981\u590d\u5236\u7684\u5143\u7d20\u6570\u91cf \u8981\u5c06\u6570\u7ec4\u524d\u79fb\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06 srcPos \u8bbe\u7f6e\u4e3a\u8981\u524d\u79fb\u7684\u5143\u7d20\u6570\u91cf\uff0c\u5c06 destPos \u8bbe\u7f6e\u4e3a 0\uff0c\u7136\u540e\u5c06 length \u8bbe\u7f6e\u4e3a\u6570\u7ec4\u7684\u957f\u5ea6\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u4ee5\u4e0b\u793a\u4f8b\u6f14\u793a\u4e86\u5982\u4f55\u5c06\u6570\u7ec4 arr \u524d\u79fb 2 \u4e2a\u5143\u7d20\uff1a int[] arr = {1, 2, […]<\/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-65573","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65573","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=65573"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65573\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=65573"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=65573"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=65573"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}