{"id":37025,"date":"2024-11-26T10:06:33","date_gmt":"2024-11-26T02:06:33","guid":{"rendered":"https:\/\/fwq.ai\/blog\/37025\/"},"modified":"2024-11-26T10:06:33","modified_gmt":"2024-11-26T02:06:33","slug":"java%e6%80%8e%e4%b9%88%e5%8f%96%e5%87%ba%e5%ad%90%e6%95%b0%e7%bb%84","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/37025\/","title":{"rendered":"java\u600e\u4e48\u53d6\u51fa\u5b50\u6570\u7ec4"},"content":{"rendered":"

\n java \u4e2d\u53d6\u51fa\u5b50\u6570\u7ec4\u6709\u4e24\u79cd\u65b9\u6cd5\uff1a\u4f7f\u7528 system.arraycopy() \u65b9\u6cd5\u4ece\u6307\u5b9a\u4f4d\u7f6e\u590d\u5236\u90e8\u5206\u5143\u7d20\u5230\u76ee\u6807\u6570\u7ec4\uff1b\u4f7f\u7528 arrays.copyofrange() \u65b9\u6cd5\u8fd4\u56de\u6307\u5b9a\u8303\u56f4\u5185\u7684\u5b50\u6570\u7ec4\u7684\u65b0\u6570\u7ec4\u3002\n<\/p><\/blockquote>\n

\"java\u600e\u4e48\u53d6\u51fa\u5b50\u6570\u7ec4\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u7528 Java \u53d6\u51fa\u5b50\u6570\u7ec4<\/strong><\/p>\n

\u5728 Java \u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4e24\u79cd\u65b9\u6cd5\u53d6\u51fa\u5b50\u6570\u7ec4\uff1a<\/p>\n

1. \u4f7f\u7528 System.arraycopy() \u65b9\u6cd5<\/strong><\/p>\n

System.arraycopy() \u65b9\u6cd5\u5c06\u6307\u5b9a\u6e90\u6570\u7ec4\u7684\u4e00\u90e8\u5206\u590d\u5236\u5230\u76ee\u6807\u6570\u7ec4\u4e2d\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/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\uff1a\u6e90\u6570\u7ec4<\/li>\n
  • srcPos\uff1a\u6e90\u6570\u7ec4\u4e2d\u7684\u8d77\u59cb\u4f4d\u7f6e<\/li>\n
  • dest\uff1a\u76ee\u6807\u6570\u7ec4<\/li>\n
  • destPos\uff1a\u76ee\u6807\u6570\u7ec4\u4e2d\u7684\u8d77\u59cb\u4f4d\u7f6e<\/li>\n
  • length\uff1a\u8981\u590d\u5236\u7684\u5143\u7d20\u6570\u91cf<\/li>\n<\/ul>\n
    \u4f8b\u5982\uff1a<\/p>\n
    int[] arr = {1, 2, 3, 4, 5, 6, 7};\nint[] subArr = new int[3];\nSystem.arraycopy(arr, 2, subArr, 0, 3);<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u6267\u884c\u6b64\u4ee3\u7801\u540e\uff0csubArr \u5c06\u5305\u542b [3, 4, 5]\u3002<\/p>\n
    2. \u4f7f\u7528 Arrays.copyOfRange() \u65b9\u6cd5<\/strong><\/p>\n
    Arrays.copyOfRange() \u65b9\u6cd5\u8fd4\u56de\u6307\u5b9a\u8303\u56f4\u5185\u7684\u5b50\u6570\u7ec4\u7684\u65b0\u6570\u7ec4\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n
    public static <T> T[] copyOfRange(T[] original, int from, int to)<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u5176\u4e2d\uff1a<\/p>\n
      \n
    • original\uff1a\u6e90\u6570\u7ec4<\/li>\n
    • from\uff1a\u8d77\u59cb\u7d22\u5f15\uff08\u542b\uff09<\/li>\n
    • to\uff1a\u7ed3\u675f\u7d22\u5f15\uff08\u4e0d\u542b\uff09<\/li>\n<\/ul>\n
      \u4f8b\u5982\uff1a<\/p>\n
      int[] arr = {1, 2, 3, 4, 5, 6, 7};\nint[] subArr = Arrays.copyOfRange(arr, 2, 5);<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u6267\u884c\u6b64\u4ee3\u7801\u540e\uff0csubArr \u5c06\u5305\u542b [3, 4, 5]\u3002<\/p>\n
      \u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u53d6\u51fa\u5b50\u6570\u7ec4\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\u53d6\u51fa\u5b50\u6570\u7ec4\u6709\u4e24\u79cd\u65b9\u6cd5\uff1a\u4f7f\u7528 system.arraycopy() \u65b9\u6cd5\u4ece\u6307\u5b9a\u4f4d\u7f6e\u590d\u5236\u90e8\u5206\u5143\u7d20\u5230\u76ee\u6807\u6570\u7ec4\uff1b\u4f7f\u7528 arrays.copyofrange() \u65b9\u6cd5\u8fd4\u56de\u6307\u5b9a\u8303\u56f4\u5185\u7684\u5b50\u6570\u7ec4\u7684\u65b0\u6570\u7ec4\u3002 \u5982\u4f55\u7528 Java \u53d6\u51fa\u5b50\u6570\u7ec4 \u5728 Java \u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4e24\u79cd\u65b9\u6cd5\u53d6\u51fa\u5b50\u6570\u7ec4\uff1a 1. \u4f7f\u7528 System.arraycopy() \u65b9\u6cd5 System.arraycopy() \u65b9\u6cd5\u5c06\u6307\u5b9a\u6e90\u6570\u7ec4\u7684\u4e00\u90e8\u5206\u590d\u5236\u5230\u76ee\u6807\u6570\u7ec4\u4e2d\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b public static void arraycopy(Object src, int srcPos, Object dest, int destPos, int length) \u767b\u5f55\u540e\u590d\u5236 \u5176\u4e2d\uff1a src\uff1a\u6e90\u6570\u7ec4 srcPos\uff1a\u6e90\u6570\u7ec4\u4e2d\u7684\u8d77\u59cb\u4f4d\u7f6e dest\uff1a\u76ee\u6807\u6570\u7ec4 destPos\uff1a\u76ee\u6807\u6570\u7ec4\u4e2d\u7684\u8d77\u59cb\u4f4d\u7f6e length\uff1a\u8981\u590d\u5236\u7684\u5143\u7d20\u6570\u91cf \u4f8b\u5982\uff1a int[] arr = {1, 2, 3, 4, 5, 6, 7}; int[] subArr = new int[3]; […]<\/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-37025","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37025","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=37025"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37025\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=37025"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=37025"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=37025"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}