{"id":37285,"date":"2024-11-26T13:10:49","date_gmt":"2024-11-26T05:10:49","guid":{"rendered":"https:\/\/fwq.ai\/blog\/37285\/"},"modified":"2024-11-26T13:10:49","modified_gmt":"2024-11-26T05:10:49","slug":"java%e5%a4%8d%e5%88%b6%e6%95%b0%e7%bb%84%e5%87%bd%e6%95%b0%e6%80%8e%e4%b9%88%e5%86%99","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/37285\/","title":{"rendered":"java\u590d\u5236\u6570\u7ec4\u51fd\u6570\u600e\u4e48\u5199"},"content":{"rendered":"

\n java\u4e2d\u590d\u5236\u6570\u7ec4\u7684\u51fd\u6570\u662farrays.copyof()\uff0c\u5b83\u63a5\u6536\u4e24\u4e2a\u53c2\u6570\uff1a\u539f\u59cb\u6570\u7ec4\u548c\u65b0\u6570\u7ec4\u957f\u5ea6\uff0c\u8fd4\u56de\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5305\u542b\u539f\u59cb\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u526f\u672c\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u65b0\u6570\u7ec4\u662f\u72ec\u7acb\u7684\uff0c\u4e0d\u4f1a\u5f71\u54cd\u539f\u59cb\u6570\u7ec4\u3002\n<\/p><\/blockquote>\n

\"java\u590d\u5236\u6570\u7ec4\u51fd\u6570\u600e\u4e48\u5199\u63d2\u56fe\"<\/p>\n

Java \u4e2d\u590d\u5236\u6570\u7ec4\u7684\u51fd\u6570<\/strong><\/p>\n

\u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 Arrays.copyOf() \u51fd\u6570\u590d\u5236\u6570\u7ec4\u3002\u6b64\u51fd\u6570\u63a5\u6536\u4e24\u4e2a\u53c2\u6570\uff1a\u8981\u590d\u5236\u7684\u539f\u59cb\u6570\u7ec4\u548c\u65b0\u6570\u7ec4\u7684\u957f\u5ea6\u3002<\/p>\n

\u8bed\u6cd5\uff1a<\/strong><\/p>\n

public static <T> T[] copyOf(T[] original, int newLength);<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u53c2\u6570\uff1a<\/strong><\/p>\n
\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
    \n
  • original – \u8981\u590d\u5236\u7684\u539f\u59cb\u6570\u7ec4\u3002<\/li>\n
  • newLength – \u65b0\u6570\u7ec4\u7684\u957f\u5ea6\u3002\u5982\u679c\u65b0\u957f\u5ea6\u5c0f\u4e8e\u539f\u59cb\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u5219\u65b0\u6570\u7ec4\u5c06\u88ab\u622a\u65ad\uff1b\u5982\u679c\u65b0\u957f\u5ea6\u5927\u4e8e\u539f\u59cb\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u5219\u65b0\u6570\u7ec4\u5c06\u7528\u96f6\u503c\u586b\u5145\u3002<\/li>\n<\/ul>\n
    \u8fd4\u56de\u503c\uff1a<\/strong><\/p>\n
    \u8fd4\u56de\u4e00\u4e2a\u5177\u6709\u6307\u5b9a\u957f\u5ea6\u7684\u65b0\u6570\u7ec4\uff0c\u8be5\u6570\u7ec4\u5305\u542b\u539f\u59cb\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u526f\u672c\u3002<\/p>\n
    \u793a\u4f8b\uff1a<\/strong><\/p>\n
    int[] originalArray = {1, 2, 3, 4, 5};\n\n\/\/ \u521b\u5efa\u4e00\u4e2a\u4e0e\u539f\u59cb\u6570\u7ec4\u957f\u5ea6\u76f8\u540c\u7684\u526f\u672c\nint[] copyArray1 = Arrays.copyOf(originalArray, originalArray.length);\n\n\/\/ \u521b\u5efa\u4e00\u4e2a\u6bd4\u539f\u59cb\u6570\u7ec4\u957f\u5ea6\u77ed\u7684\u526f\u672c\nint[] copyArray2 = Arrays.copyOf(originalArray, 3);\n\n\/\/ \u521b\u5efa\u4e00\u4e2a\u6bd4\u539f\u59cb\u6570\u7ec4\u957f\u5ea6\u957f\u7684\u526f\u672c\nint[] copyArray3 = Arrays.copyOf(originalArray, 7);<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u6ce8\u610f\u4e8b\u9879\uff1a<\/strong><\/p>\n
      \n
    • Arrays.copyOf() \u51fd\u6570\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u800c\u4e0d\u662f\u539f\u59cb\u6570\u7ec4\u7684\u5f15\u7528\u3002<\/li>\n
    • \u539f\u59cb\u6570\u7ec4\u548c\u65b0\u6570\u7ec4\u662f\u72ec\u7acb\u7684\uff0c\u5bf9\u5176\u4e2d\u4e00\u4e2a\u6570\u7ec4\u6240\u505a\u7684\u66f4\u6539\u4e0d\u4f1a\u5f71\u54cd\u53e6\u4e00\u4e2a\u6570\u7ec4\u3002<\/li>\n
    • Arrays.copyOf() \u51fd\u6570\u53ef\u4ee5\u7528\u4e8e\u590d\u5236\u5404\u79cd\u7c7b\u578b\u7684\u6570\u7ec4\uff0c\u5305\u62ec\u5bf9\u8c61\u6570\u7ec4\u3002<\/li>\n
    • \u5982\u679c\u8981\u590d\u5236\u591a\u7ef4\u6570\u7ec4\uff0c\u5219\u9700\u8981\u4f7f\u7528 Arrays.deepCopy() \u51fd\u6570\u3002<\/li>\n<\/ul>\n
      \u4ee5\u4e0a\u5c31\u662fjava\u590d\u5236\u6570\u7ec4\u51fd\u6570\u600e\u4e48\u5199\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\u590d\u5236\u6570\u7ec4\u7684\u51fd\u6570\u662farrays.copyof()\uff0c\u5b83\u63a5\u6536\u4e24\u4e2a\u53c2\u6570\uff1a\u539f\u59cb\u6570\u7ec4\u548c\u65b0\u6570\u7ec4\u957f\u5ea6\uff0c\u8fd4\u56de\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5305\u542b\u539f\u59cb\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u526f\u672c\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u65b0\u6570\u7ec4\u662f\u72ec\u7acb\u7684\uff0c\u4e0d\u4f1a\u5f71\u54cd\u539f\u59cb\u6570\u7ec4\u3002 Java \u4e2d\u590d\u5236\u6570\u7ec4\u7684\u51fd\u6570 \u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 Arrays.copyOf() \u51fd\u6570\u590d\u5236\u6570\u7ec4\u3002\u6b64\u51fd\u6570\u63a5\u6536\u4e24\u4e2a\u53c2\u6570\uff1a\u8981\u590d\u5236\u7684\u539f\u59cb\u6570\u7ec4\u548c\u65b0\u6570\u7ec4\u7684\u957f\u5ea6\u3002 \u8bed\u6cd5\uff1a public static <T> T[] copyOf(T[] original, int newLength); \u767b\u5f55\u540e\u590d\u5236 \u53c2\u6570\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b original – \u8981\u590d\u5236\u7684\u539f\u59cb\u6570\u7ec4\u3002 newLength – \u65b0\u6570\u7ec4\u7684\u957f\u5ea6\u3002\u5982\u679c\u65b0\u957f\u5ea6\u5c0f\u4e8e\u539f\u59cb\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u5219\u65b0\u6570\u7ec4\u5c06\u88ab\u622a\u65ad\uff1b\u5982\u679c\u65b0\u957f\u5ea6\u5927\u4e8e\u539f\u59cb\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u5219\u65b0\u6570\u7ec4\u5c06\u7528\u96f6\u503c\u586b\u5145\u3002 \u8fd4\u56de\u503c\uff1a \u8fd4\u56de\u4e00\u4e2a\u5177\u6709\u6307\u5b9a\u957f\u5ea6\u7684\u65b0\u6570\u7ec4\uff0c\u8be5\u6570\u7ec4\u5305\u542b\u539f\u59cb\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u526f\u672c\u3002 \u793a\u4f8b\uff1a int[] originalArray = {1, 2, 3, 4, 5}; \/\/ \u521b\u5efa\u4e00\u4e2a\u4e0e\u539f\u59cb\u6570\u7ec4\u957f\u5ea6\u76f8\u540c\u7684\u526f\u672c int[] copyArray1 = Arrays.copyOf(originalArray, originalArray.length); \/\/ \u521b\u5efa\u4e00\u4e2a\u6bd4\u539f\u59cb\u6570\u7ec4\u957f\u5ea6\u77ed\u7684\u526f\u672c int[] copyArray2 = Arrays.copyOf(originalArray, 3); \/\/ \u521b\u5efa\u4e00\u4e2a\u6bd4\u539f\u59cb\u6570\u7ec4\u957f\u5ea6\u957f\u7684\u526f\u672c int[] copyArray3 […]<\/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-37285","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37285","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=37285"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37285\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=37285"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=37285"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=37285"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}