{"id":64178,"date":"2025-05-03T11:55:05","date_gmt":"2025-05-03T03:55:05","guid":{"rendered":"https:\/\/fwq.ai\/blog\/64178\/"},"modified":"2025-05-03T11:55:05","modified_gmt":"2025-05-03T03:55:05","slug":"java%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e5%88%a0%e9%99%a4%e4%b8%80%e7%bb%84%e5%85%83%e7%b4%a0-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/64178\/","title":{"rendered":"java\u6570\u7ec4\u600e\u4e48\u5220\u9664\u4e00\u7ec4\u5143\u7d20"},"content":{"rendered":"

java \u6570\u7ec4\u4e2d\u5220\u9664\u4e00\u7ec4\u5143\u7d20<\/strong><\/p>\n

\u5728 Java \u4e2d\uff0c\u4f60\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528 System.arraycopy() \u65b9\u6cd5\u6765\u5220\u9664\u6570\u7ec4\u4e2d\u7684\u4e00\u7ec4\u5143\u7d20\u3002\u6b64\u65b9\u6cd5\u5c06\u539f\u6570\u7ec4\u4e2d\u6307\u5b9a\u8303\u56f4\u5185\u7684\u5143\u7d20\u590d\u5236\u5230\u4e00\u4e2a\u65b0\u6570\u7ec4\u4e2d\uff0c\u4ece\u800c\u7701\u7565\u88ab\u5220\u9664\u7684\u5143\u7d20\u3002<\/p>\n

\u8bed\u6cd5\uff1a<\/strong><\/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
\u53c2\u6570\uff1a<\/strong><\/p>\n
    \n
  • src – \u8981\u4ece\u4e2d\u590d\u5236\u5143\u7d20\u7684\u6e90\u6570\u7ec4<\/li>\n
  • srcPos – \u6e90\u6570\u7ec4\u4e2d\u8981\u590d\u5236\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u7d22\u5f15<\/li>\n
  • dest – \u8981\u5c06\u590d\u5236\u7684\u5143\u7d20\u7c98\u8d34\u5230\u7684\u76ee\u6807\u6570\u7ec4<\/li>\n
  • destPos – \u76ee\u6807\u6570\u7ec4\u4e2d\u8981\u7c98\u8d34\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u7d22\u5f15<\/li>\n
  • length – \u8981\u590d\u5236\u7684\u5143\u7d20\u7684\u6570\u91cf<\/li>\n<\/ul>\n
    \u6b65\u9aa4\uff1a<\/strong><\/p>\n
    \u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
      \n
    1. \u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u957f\u5ea6\u7b49\u4e8e\u539f\u59cb\u6570\u7ec4\u51cf\u53bb\u8981\u5220\u9664\u7684\u5143\u7d20\u7684\u6570\u91cf\u3002<\/li>\n
    2. \u4f7f\u7528 System.arraycopy() \u65b9\u6cd5\u5c06\u539f\u59cb\u6570\u7ec4\u4e2d\u5220\u9664\u5143\u7d20\u4e4b\u524d\u7684\u5143\u7d20\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\u3002<\/li>\n
    3. \u4f7f\u7528 System.arraycopy() \u65b9\u6cd5\u5c06\u539f\u59cb\u6570\u7ec4\u4e2d\u5220\u9664\u5143\u7d20\u4e4b\u540e\u7684\u5143\u7d20\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\u3002<\/li>\n<\/ol>\n
      \u793a\u4f8b\uff1a<\/strong><\/p>\n
      \u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u6574\u6570\u6570\u7ec4 numbers\uff0c\u5982\u4e0b\uff1a<\/p>\n
      int[] numbers = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u8981\u5220\u9664\u6570\u7ec4\u4e2d\u7d22\u5f15\u4e3a 3 \u5230 6\uff08\u5305\u62ec 6\uff09\u7684\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
      \/\/ \u521b\u5efa\u65b0\u6570\u7ec4\nint[] newArray = new int[numbers.length - (6 - 3 + 1)];\n\n\/\/ \u590d\u5236\u5220\u9664\u5143\u7d20\u4e4b\u524d\u7684\u5143\u7d20\nSystem.arraycopy(numbers, 0, newArray, 0, 3);\n\n\/\/ \u590d\u5236\u5220\u9664\u5143\u7d20\u4e4b\u540e\u7684\u5143\u7d20\nSystem.arraycopy(numbers, 7, newArray, 3, newArray.length - 3);<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u5220\u9664\u5143\u7d20\u540e\uff0cnewArray \u5c06\u5305\u542b\u4ee5\u4e0b\u5143\u7d20\uff1a<\/p>\n
      newArray = {1, 2, 3, 7, 8, 9, 10}<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4\u600e\u4e48\u5220\u9664\u4e00\u7ec4\u5143\u7d20\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\u4e2d\u5220\u9664\u4e00\u7ec4\u5143\u7d20 \u5728 Java \u4e2d\uff0c\u4f60\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528 System.arraycopy() \u65b9\u6cd5\u6765\u5220\u9664\u6570\u7ec4\u4e2d\u7684\u4e00\u7ec4\u5143\u7d20\u3002\u6b64\u65b9\u6cd5\u5c06\u539f\u6570\u7ec4\u4e2d\u6307\u5b9a\u8303\u56f4\u5185\u7684\u5143\u7d20\u590d\u5236\u5230\u4e00\u4e2a\u65b0\u6570\u7ec4\u4e2d\uff0c\u4ece\u800c\u7701\u7565\u88ab\u5220\u9664\u7684\u5143\u7d20\u3002 \u8bed\u6cd5\uff1a public static void arraycopy(Object src, int srcPos, Object dest, int destPos, int length) \u767b\u5f55\u540e\u590d\u5236 \u53c2\u6570\uff1a src – \u8981\u4ece\u4e2d\u590d\u5236\u5143\u7d20\u7684\u6e90\u6570\u7ec4 srcPos – \u6e90\u6570\u7ec4\u4e2d\u8981\u590d\u5236\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u7d22\u5f15 dest – \u8981\u5c06\u590d\u5236\u7684\u5143\u7d20\u7c98\u8d34\u5230\u7684\u76ee\u6807\u6570\u7ec4 destPos – \u76ee\u6807\u6570\u7ec4\u4e2d\u8981\u7c98\u8d34\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u7d22\u5f15 length – \u8981\u590d\u5236\u7684\u5143\u7d20\u7684\u6570\u91cf \u6b65\u9aa4\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u957f\u5ea6\u7b49\u4e8e\u539f\u59cb\u6570\u7ec4\u51cf\u53bb\u8981\u5220\u9664\u7684\u5143\u7d20\u7684\u6570\u91cf\u3002 \u4f7f\u7528 System.arraycopy() \u65b9\u6cd5\u5c06\u539f\u59cb\u6570\u7ec4\u4e2d\u5220\u9664\u5143\u7d20\u4e4b\u524d\u7684\u5143\u7d20\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\u3002 \u4f7f\u7528 System.arraycopy() \u65b9\u6cd5\u5c06\u539f\u59cb\u6570\u7ec4\u4e2d\u5220\u9664\u5143\u7d20\u4e4b\u540e\u7684\u5143\u7d20\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\u3002 \u793a\u4f8b\uff1a \u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u6574\u6570\u6570\u7ec4 numbers\uff0c\u5982\u4e0b\uff1a int[] numbers = {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-64178","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64178","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=64178"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64178\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=64178"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=64178"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=64178"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}