{"id":36658,"date":"2024-11-26T16:45:33","date_gmt":"2024-11-26T08:45:33","guid":{"rendered":"https:\/\/fwq.ai\/blog\/36658\/"},"modified":"2024-11-26T16:45:33","modified_gmt":"2024-11-26T08:45:33","slug":"java%e6%80%8e%e4%b9%88%e7%bb%99%e6%95%b0%e7%bb%84%e5%a4%8d%e5%88%b6","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/36658\/","title":{"rendered":"java\u600e\u4e48\u7ed9\u6570\u7ec4\u590d\u5236"},"content":{"rendered":"

\n \u53ef\u4ee5\u901a\u8fc7\u4e0b\u5217\u65b9\u6cd5\u590d\u5236 java \u6570\u7ec4\uff1a\u4f7f\u7528 arrays.copyof() \u521b\u5efa\u65b0\u6570\u7ec4\uff0c\u5305\u542b\u6307\u5b9a\u6570\u91cf\u7684\u5143\u7d20\u3002\u4f7f\u7528 system.arraycopy() \u5c06\u90e8\u5206\u6570\u7ec4\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\u3002\u624b\u52a8\u9010\u4e2a\u5143\u7d20\u521b\u5efa\u526f\u672c\u3002\n<\/p><\/blockquote>\n

\"java\u600e\u4e48\u7ed9\u6570\u7ec4\u590d\u5236\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u5728 Java \u4e2d\u590d\u5236\u6570\u7ec4<\/h2>\n

\u5728 Java \u4e2d\uff0c\u6709\u51e0\u79cd\u65b9\u6cd5\u53ef\u4ee5\u590d\u5236\u6570\u7ec4\uff1a<\/p>\n

\u4f7f\u7528 Arrays.copyOf()<\/h3>\n

Arrays.copyOf() \u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u4e2d\u5305\u542b\u6307\u5b9a\u6570\u7ec4\u4e2d\u7684\u6307\u5b9a\u6570\u91cf\u7684\u5143\u7d20\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

static <T> T[] copyOf(T[] original, int newLength)<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5176\u4e2d\uff1a<\/p>\n
    \n
  • original \u662f\u8981\u590d\u5236\u7684\u539f\u59cb\u6570\u7ec4\u3002<\/li>\n
  • newLength \u662f\u65b0\u6570\u7ec4\u7684\u5927\u5c0f\u3002<\/li>\n<\/ul>\n
    \u793a\u4f8b\uff1a<\/p>\n
    \u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
    int[] originalArray = {1, 2, 3, 4, 5};\nint[] copyArray = Arrays.copyOf(originalArray, 3);<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0ccopyArray \u5c06\u5305\u542b\u539f\u59cb\u6570\u7ec4\u4e2d\u7684\u524d\u4e09\u4e2a\u5143\u7d20\uff1a{1, 2, 3}\u3002<\/p>\n
    \u4f7f\u7528 System.arraycopy()<\/h3>\n
    System.arraycopy() \u65b9\u6cd5\u5c06\u4e00\u4e2a\u6570\u7ec4\u7684\u4e00\u90e8\u5206\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\u4e2d\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n
    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\u3002<\/li>\n
    • srcPos \u662f\u6e90\u6570\u7ec4\u4e2d\u8981\u590d\u5236\u7684\u8d77\u59cb\u4f4d\u7f6e\u3002<\/li>\n
    • dest \u662f\u76ee\u6807\u6570\u7ec4\u3002<\/li>\n
    • destPos \u662f\u76ee\u6807\u6570\u7ec4\u4e2d\u8981\u590d\u5236\u5230\u7684\u8d77\u59cb\u4f4d\u7f6e\u3002<\/li>\n
    • length \u662f\u8981\u590d\u5236\u7684\u5143\u7d20\u6570\u91cf\u3002<\/li>\n<\/ul>\n
      \u793a\u4f8b\uff1a<\/p>\n
      \u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
      int[] originalArray = {1, 2, 3, 4, 5};\nint[] copyArray = new int[3];\nSystem.arraycopy(originalArray, 0, copyArray, 0, 3);<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0ccopyArray \u5c06\u5305\u542b\u539f\u59cb\u6570\u7ec4\u4e2d\u7684\u524d\u4e09\u4e2a\u5143\u7d20\uff1a{1, 2, 3}\u3002<\/p>\n
      \u624b\u52a8\u521b\u5efa\u526f\u672c<\/h3>\n
      \u4e5f\u53ef\u4ee5\u624b\u52a8\u521b\u5efa\u6570\u7ec4\u7684\u526f\u672c\uff0c\u65b9\u6cd5\u662f\u9010\u4e2a\u5143\u7d20\u8fdb\u884c\u590d\u5236\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n
      int[] originalArray = {1, 2, 3, 4, 5};\nint[] copyArray = new int[originalArray.length];\nfor (int i = 0; i < originalArray.length; i++) {\n    copyArray[i] = originalArray[i];\n}<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0ccopyArray \u5c06\u5305\u542b\u539f\u59cb\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\uff1a{1, 2, 3, 4, 5}\u3002<\/p>\n
      \u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u7ed9\u6570\u7ec4\u590d\u5236\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":"
      \u53ef\u4ee5\u901a\u8fc7\u4e0b\u5217\u65b9\u6cd5\u590d\u5236 java \u6570\u7ec4\uff1a\u4f7f\u7528 arrays.copyof() \u521b\u5efa\u65b0\u6570\u7ec4\uff0c\u5305\u542b\u6307\u5b9a\u6570\u91cf\u7684\u5143\u7d20\u3002\u4f7f\u7528 system.arraycopy() \u5c06\u90e8\u5206\u6570\u7ec4\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\u3002\u624b\u52a8\u9010\u4e2a\u5143\u7d20\u521b\u5efa\u526f\u672c\u3002 \u5982\u4f55\u5728 Java \u4e2d\u590d\u5236\u6570\u7ec4 \u5728 Java \u4e2d\uff0c\u6709\u51e0\u79cd\u65b9\u6cd5\u53ef\u4ee5\u590d\u5236\u6570\u7ec4\uff1a \u4f7f\u7528 Arrays.copyOf() Arrays.copyOf() \u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u4e2d\u5305\u542b\u6307\u5b9a\u6570\u7ec4\u4e2d\u7684\u6307\u5b9a\u6570\u91cf\u7684\u5143\u7d20\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a static <T> T[] copyOf(T[] original, int newLength) \u767b\u5f55\u540e\u590d\u5236 \u5176\u4e2d\uff1a original \u662f\u8981\u590d\u5236\u7684\u539f\u59cb\u6570\u7ec4\u3002 newLength \u662f\u65b0\u6570\u7ec4\u7684\u5927\u5c0f\u3002 \u793a\u4f8b\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[] originalArray = {1, 2, 3, 4, 5}; int[] copyArray = Arrays.copyOf(originalArray, 3); \u767b\u5f55\u540e\u590d\u5236 \u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0ccopyArray \u5c06\u5305\u542b\u539f\u59cb\u6570\u7ec4\u4e2d\u7684\u524d\u4e09\u4e2a\u5143\u7d20\uff1a{1, 2, 3}\u3002 \u4f7f\u7528 System.arraycopy() System.arraycopy() \u65b9\u6cd5\u5c06\u4e00\u4e2a\u6570\u7ec4\u7684\u4e00\u90e8\u5206\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\u4e2d\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a static […]<\/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-36658","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/36658","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=36658"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/36658\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=36658"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=36658"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=36658"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}