{"id":64638,"date":"2025-05-03T10:52:12","date_gmt":"2025-05-03T02:52:12","guid":{"rendered":"https:\/\/fwq.ai\/blog\/64638\/"},"modified":"2025-05-03T10:52:12","modified_gmt":"2025-05-03T02:52:12","slug":"java%e6%80%8e%e4%b9%88%e5%b0%86%e6%95%b0%e7%bb%84%e6%8b%bc%e6%8e%a5%e5%88%b0%e4%b8%80%e8%b5%b7-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/64638\/","title":{"rendered":"java\u600e\u4e48\u5c06\u6570\u7ec4\u62fc\u63a5\u5230\u4e00\u8d77"},"content":{"rendered":"

\n \u5728 java \u4e2d\uff0c\u53ef\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u62fc\u63a5\u6570\u7ec4\uff1aarrays.copyof\uff1a\u8fd4\u56de\u5305\u542b\u539f\u59cb\u6570\u7ec4\u90e8\u5206\u6216\u5168\u90e8\u5185\u5bb9\u7684\u65b0\u6570\u7ec4\u3002arrays.copyofrange\uff1a\u8fd4\u56de\u5305\u542b\u539f\u59cb\u6570\u7ec4\u6307\u5b9a\u90e8\u5206\u5185\u5bb9\u7684\u65b0\u6570\u7ec4\u3002system.arraycopy\uff1a\u5c06\u539f\u59cb\u6570\u7ec4\u7684\u4e00\u90e8\u5206\u590d\u5236\u5230\u76ee\u6807\u6570\u7ec4\u4e2d\u3002joiner \u7c7b\uff1a\u4f7f\u7528\u6307\u5b9a\u5206\u9694\u7b26\u8fde\u63a5\u6570\u7ec4\u5143\u7d20\uff0c\u8fd4\u56de\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002\n<\/p><\/blockquote>\n

\"java\u600e\u4e48\u5c06\u6570\u7ec4\u62fc\u63a5\u5230\u4e00\u8d77\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u4f7f\u7528 Java \u5c06\u6570\u7ec4\u62fc\u63a5\u5230\u4e00\u8d77<\/strong><\/p>\n

\u7b80\u4ecb<\/strong>
\u5728 Java \u4e2d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4e0d\u540c\u7684\u65b9\u6cd5\u6765\u62fc\u63a5\u6570\u7ec4\uff0c\u5305\u62ec\u4f7f\u7528 Arrays.copyOf\u3001Arrays.copyOfRange\u3001System.arraycopy \u548c Joiner \u7c7b\u3002<\/p>\n

\u65b9\u6cd5<\/strong><\/p>\n

1. Arrays.copyOf<\/strong>
Arrays.copyOf \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u8be5\u6570\u7ec4\u5305\u542b\u6307\u5b9a\u6570\u7ec4\u7684\u90e8\u5206\u6216\u5168\u90e8\u5185\u5bb9\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a<\/p>\n

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

int[] newArray = Arrays.copyOf(originalArray, newLength);<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5176\u4e2d\uff1a<\/p>\n
    \n
  • originalArray \u662f\u8981\u590d\u5236\u7684\u539f\u59cb\u6570\u7ec4\u3002<\/li>\n
  • newLength \u662f\u65b0\u6570\u7ec4\u7684\u957f\u5ea6\u3002<\/li>\n<\/ul>\n
    2. Arrays.copyOfRange<\/strong>
    Arrays.copyOfRange \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u8be5\u6570\u7ec4\u5305\u542b\u6307\u5b9a\u6570\u7ec4\u7684\u4e00\u90e8\u5206\u5185\u5bb9\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a<\/p>\n
    int[] newArray = Arrays.copyOfRange(originalArray, startIndex, endIndex);<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u5176\u4e2d\uff1a<\/p>\n
      \n
    • originalArray \u662f\u8981\u590d\u5236\u7684\u539f\u59cb\u6570\u7ec4\u3002<\/li>\n
    • startIndex \u662f\u590d\u5236\u5f00\u59cb\u7684\u7d22\u5f15\u3002<\/li>\n
    • endIndex \u662f\u590d\u5236\u7ed3\u675f\u7684\u7d22\u5f15\uff08\u4e0d\u5305\u542b\u5728\u5185\uff09\u3002<\/li>\n<\/ul>\n
      3. System.arraycopy<\/strong>
      System.arraycopy \u65b9\u6cd5\u5c06\u4e00\u4e2a\u6570\u7ec4\u7684\u4e00\u90e8\u5206\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\u4e2d\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a<\/p>\n
      System.arraycopy(srcArray, srcPos, destArray, destPos, length);<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u5176\u4e2d\uff1a<\/p>\n
        \n
      • srcArray \u662f\u6e90\u6570\u7ec4\u3002<\/li>\n
      • srcPos \u662f\u6e90\u6570\u7ec4\u4e2d\u590d\u5236\u5f00\u59cb\u7684\u4f4d\u7f6e\u3002<\/li>\n
      • destArray \u662f\u76ee\u6807\u6570\u7ec4\u3002<\/li>\n
      • destPos \u662f\u76ee\u6807\u6570\u7ec4\u4e2d\u590d\u5236\u5f00\u59cb\u7684\u4f4d\u7f6e\u3002<\/li>\n
      • length \u662f\u8981\u590d\u5236\u7684\u5143\u7d20\u6570\u3002<\/li>\n<\/ul>\n
        4. Joiner \u7c7b<\/strong>
        Joiner \u7c7b\u63d0\u4f9b\u4e86\u7528\u4e8e\u8fde\u63a5\u5b57\u7b26\u4e32\u7684\u5b9e\u7528\u65b9\u6cd5\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a<\/p>\n
        String joinedString = Joiner.on(\",\").join(array);<\/pre>\n
         \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
        \u5176\u4e2d\uff1a<\/p>\n
          \n
        • array \u662f\u8981\u8fde\u63a5\u7684\u6570\u7ec4\u3002<\/li>\n
        • on \u6307\u5b9a\u8981\u7528\u4f5c\u5206\u9694\u7b26\u7684\u5b57\u7b26\u4e32\u3002<\/li>\n<\/ul>\n
          \u793a\u4f8b<\/strong><\/p>\n
          int[] array1 = {1, 2, 3};\nint[] array2 = {4, 5, 6};\n\n\/\/ \u4f7f\u7528 Arrays.copyOf \u62fc\u63a5\u6570\u7ec4\nint[] newArray = Arrays.copyOf(array1, array1.length + array2.length);\nSystem.arraycopy(array2, 0, newArray, array1.length, array2.length);\n\n\/\/ \u6253\u5370\u65b0\u6570\u7ec4\nSystem.out.println(Arrays.toString(newArray)); \/\/ \u8f93\u51fa\uff1a [1, 2, 3, 4, 5, 6]<\/pre>\n
           \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
          \u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u5c06\u6570\u7ec4\u62fc\u63a5\u5230\u4e00\u8d77\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
          \u5728 java \u4e2d\uff0c\u53ef\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u62fc\u63a5\u6570\u7ec4\uff1aarrays.copyof\uff1a\u8fd4\u56de\u5305\u542b\u539f\u59cb\u6570\u7ec4\u90e8\u5206\u6216\u5168\u90e8\u5185\u5bb9\u7684\u65b0\u6570\u7ec4\u3002arrays.copyofrange\uff1a\u8fd4\u56de\u5305\u542b\u539f\u59cb\u6570\u7ec4\u6307\u5b9a\u90e8\u5206\u5185\u5bb9\u7684\u65b0\u6570\u7ec4\u3002system.arraycopy\uff1a\u5c06\u539f\u59cb\u6570\u7ec4\u7684\u4e00\u90e8\u5206\u590d\u5236\u5230\u76ee\u6807\u6570\u7ec4\u4e2d\u3002joiner \u7c7b\uff1a\u4f7f\u7528\u6307\u5b9a\u5206\u9694\u7b26\u8fde\u63a5\u6570\u7ec4\u5143\u7d20\uff0c\u8fd4\u56de\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002 \u5982\u4f55\u4f7f\u7528 Java \u5c06\u6570\u7ec4\u62fc\u63a5\u5230\u4e00\u8d77 \u7b80\u4ecb\u5728 Java \u4e2d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4e0d\u540c\u7684\u65b9\u6cd5\u6765\u62fc\u63a5\u6570\u7ec4\uff0c\u5305\u62ec\u4f7f\u7528 Arrays.copyOf\u3001Arrays.copyOfRange\u3001System.arraycopy \u548c Joiner \u7c7b\u3002 \u65b9\u6cd5 1. Arrays.copyOfArrays.copyOf \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u8be5\u6570\u7ec4\u5305\u542b\u6307\u5b9a\u6570\u7ec4\u7684\u90e8\u5206\u6216\u5168\u90e8\u5185\u5bb9\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[] newArray = Arrays.copyOf(originalArray, newLength); \u767b\u5f55\u540e\u590d\u5236 \u5176\u4e2d\uff1a originalArray \u662f\u8981\u590d\u5236\u7684\u539f\u59cb\u6570\u7ec4\u3002 newLength \u662f\u65b0\u6570\u7ec4\u7684\u957f\u5ea6\u3002 2. Arrays.copyOfRangeArrays.copyOfRange \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u8be5\u6570\u7ec4\u5305\u542b\u6307\u5b9a\u6570\u7ec4\u7684\u4e00\u90e8\u5206\u5185\u5bb9\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a int[] newArray = Arrays.copyOfRange(originalArray, startIndex, endIndex); \u767b\u5f55\u540e\u590d\u5236 \u5176\u4e2d\uff1a originalArray \u662f\u8981\u590d\u5236\u7684\u539f\u59cb\u6570\u7ec4\u3002 startIndex \u662f\u590d\u5236\u5f00\u59cb\u7684\u7d22\u5f15\u3002 endIndex \u662f\u590d\u5236\u7ed3\u675f\u7684\u7d22\u5f15\uff08\u4e0d\u5305\u542b\u5728\u5185\uff09\u3002 3. System.arraycopySystem.arraycopy \u65b9\u6cd5\u5c06\u4e00\u4e2a\u6570\u7ec4\u7684\u4e00\u90e8\u5206\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\u4e2d\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a System.arraycopy(srcArray, srcPos, destArray, destPos, length); […]<\/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-64638","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64638","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=64638"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64638\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=64638"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=64638"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=64638"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}