{"id":37007,"date":"2024-11-26T11:06:54","date_gmt":"2024-11-26T03:06:54","guid":{"rendered":"https:\/\/fwq.ai\/blog\/37007\/"},"modified":"2024-11-26T11:06:54","modified_gmt":"2024-11-26T03:06:54","slug":"java%e6%80%8e%e4%b9%88%e6%8a%8a%e6%95%b0%e7%bb%84%e5%8a%a0%e9%95%bf","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/37007\/","title":{"rendered":"java\u600e\u4e48\u628a\u6570\u7ec4\u52a0\u957f"},"content":{"rendered":"

\n \u6709\u4e09\u79cd\u65b9\u6cd5\u53ef\u4ee5\u6269\u5c55 java \u6570\u7ec4\uff1a\u4f7f\u7528 system.arraycopy() \u65b9\u6cd5\u590d\u5236\u5143\u7d20\u5230\u65b0\u6570\u7ec4\u3002\u4f7f\u7528 arrays.copyof() \u65b9\u6cd5\u521b\u5efa\u5305\u542b\u6307\u5b9a\u6570\u91cf\u5143\u7d20\u7684\u65b0\u6570\u7ec4\u3002\u4f7f\u7528 list \u4f5c\u4e3a\u52a8\u6001\u6570\u7ec4\uff0c\u6839\u636e\u9700\u8981\u81ea\u52a8\u6269\u5c55\uff0c\u7136\u540e\u8f6c\u6362\u4e3a\u6570\u7ec4\u3002\n<\/p><\/blockquote>\n

\"java\u600e\u4e48\u628a\u6570\u7ec4\u52a0\u957f\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u7528 Java \u6269\u5c55\u6570\u7ec4<\/strong><\/p>\n

\u5728 Java \u4e2d\uff0c\u6570\u7ec4\u4f5c\u4e3a\u56fa\u5b9a\u5927\u5c0f\u7684\u6570\u636e\u7ed3\u6784\uff0c\u4e00\u65e6\u521b\u5efa\u5c31\u4e0d\u80fd\u66f4\u6539\u5176\u957f\u5ea6\u3002\u7136\u800c\uff0c\u6709\u51e0\u79cd\u65b9\u6cd5\u53ef\u4ee5\u6709\u6548\u5730\u6269\u5c55\u6570\u7ec4\uff1a<\/p>\n

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

System.arraycopy() \u65b9\u6cd5\u53ef\u4ee5\u5c06\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\u4e2d\u3002\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u6269\u5c55\u6570\u7ec4\uff1a<\/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\u5927\u4e8e\u539f\u59cb\u6570\u7ec4\u3002<\/li>\n
  2. \u4f7f\u7528 System.arraycopy() \u65b9\u6cd5\u5c06\u539f\u59cb\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u590d\u5236\u5230\u65b0\u6570\u7ec4\u3002<\/li>\n<\/ol>\n
    int[] originalArray = {1, 2, 3};\nint[] newArray = new int[5];\n\nSystem.arraycopy(originalArray, 0, newArray, 0, originalArray.length);<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5<\/strong><\/p>\n
    Arrays.copyOf() \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u4e2d\u5305\u542b\u539f\u59cb\u6570\u7ec4\u7684\u6307\u5b9a\u6570\u91cf\u7684\u5143\u7d20\u3002\u8be5\u65b9\u6cd5\u53ef\u4ee5\u7528\u6765\u6269\u5c55\u6570\u7ec4\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
    int[] originalArray = {1, 2, 3};\nint[] newArray = Arrays.copyOf(originalArray, originalArray.length + 2);<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u4f7f\u7528 List<\/strong><\/p>\n
    List \u662f Java \u4e2d\u7684\u52a8\u6001\u6570\u7ec4\uff0c\u5b83\u53ef\u4ee5\u6839\u636e\u9700\u8981\u81ea\u52a8\u6269\u5c55\u3002\u4f7f\u7528 List \u53ef\u4ee5\u907f\u514d\u5728\u6570\u7ec4\u4e0a\u6267\u884c\u6602\u8d35\u7684\u6269\u5c55\u64cd\u4f5c\u3002<\/p>\n
      \n
    1. \u5c06\u539f\u59cb\u6570\u7ec4\u7684\u5143\u7d20\u6dfb\u52a0\u5230 List \u4e2d\u3002<\/li>\n
    2. \u4f7f\u7528 List.toArray() \u65b9\u6cd5\u5c06 List \u8f6c\u6362\u4e3a\u6570\u7ec4\u3002<\/li>\n<\/ol>\n
      List<Integer> list = new ArrayList<>();\nfor (int num : originalArray) {\n    list.add(num);\n}\nint[] newArray = list.toArray(new Integer[0]);<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u628a\u6570\u7ec4\u52a0\u957f\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":"
      \u6709\u4e09\u79cd\u65b9\u6cd5\u53ef\u4ee5\u6269\u5c55 java \u6570\u7ec4\uff1a\u4f7f\u7528 system.arraycopy() \u65b9\u6cd5\u590d\u5236\u5143\u7d20\u5230\u65b0\u6570\u7ec4\u3002\u4f7f\u7528 arrays.copyof() \u65b9\u6cd5\u521b\u5efa\u5305\u542b\u6307\u5b9a\u6570\u91cf\u5143\u7d20\u7684\u65b0\u6570\u7ec4\u3002\u4f7f\u7528 list \u4f5c\u4e3a\u52a8\u6001\u6570\u7ec4\uff0c\u6839\u636e\u9700\u8981\u81ea\u52a8\u6269\u5c55\uff0c\u7136\u540e\u8f6c\u6362\u4e3a\u6570\u7ec4\u3002 \u5982\u4f55\u7528 Java \u6269\u5c55\u6570\u7ec4 \u5728 Java \u4e2d\uff0c\u6570\u7ec4\u4f5c\u4e3a\u56fa\u5b9a\u5927\u5c0f\u7684\u6570\u636e\u7ed3\u6784\uff0c\u4e00\u65e6\u521b\u5efa\u5c31\u4e0d\u80fd\u66f4\u6539\u5176\u957f\u5ea6\u3002\u7136\u800c\uff0c\u6709\u51e0\u79cd\u65b9\u6cd5\u53ef\u4ee5\u6709\u6548\u5730\u6269\u5c55\u6570\u7ec4\uff1a \u4f7f\u7528 System.arraycopy() \u65b9\u6cd5 System.arraycopy() \u65b9\u6cd5\u53ef\u4ee5\u5c06\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\u4e2d\u3002\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u6269\u5c55\u6570\u7ec4\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u957f\u5ea6\u5927\u4e8e\u539f\u59cb\u6570\u7ec4\u3002 \u4f7f\u7528 System.arraycopy() \u65b9\u6cd5\u5c06\u539f\u59cb\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u590d\u5236\u5230\u65b0\u6570\u7ec4\u3002 int[] originalArray = {1, 2, 3}; int[] newArray = new int[5]; System.arraycopy(originalArray, 0, newArray, 0, originalArray.length); \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5 Arrays.copyOf() \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u4e2d\u5305\u542b\u539f\u59cb\u6570\u7ec4\u7684\u6307\u5b9a\u6570\u91cf\u7684\u5143\u7d20\u3002\u8be5\u65b9\u6cd5\u53ef\u4ee5\u7528\u6765\u6269\u5c55\u6570\u7ec4\uff0c\u5982\u4e0b\u6240\u793a\uff1a int[] originalArray = {1, 2, 3}; int[] newArray […]<\/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-37007","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37007","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=37007"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37007\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=37007"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=37007"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=37007"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}