{"id":66547,"date":"2025-05-03T12:36:02","date_gmt":"2025-05-03T04:36:02","guid":{"rendered":"https:\/\/fwq.ai\/blog\/66547\/"},"modified":"2025-05-03T12:36:02","modified_gmt":"2025-05-03T04:36:02","slug":"java%e6%95%b0%e7%bb%84-%e6%80%8e%e4%b9%88%e5%a4%9a%e5%8a%a0%e4%b8%80%e4%b8%aa%e5%80%bc-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/66547\/","title":{"rendered":"java\u6570\u7ec4 \u600e\u4e48\u591a\u52a0\u4e00\u4e2a\u503c"},"content":{"rendered":"

\n \u4e3a\u4e86\u5411 java \u6570\u7ec4\u6dfb\u52a0\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4e24\u79cd\u65b9\u6cd5\uff1a\u4f7f\u7528 arrays.copyof() \u521b\u5efa\u65b0\u6570\u7ec4\uff0c\u5e76\u5c06\u65b0\u503c\u6dfb\u52a0\u5230\u65b0\u6570\u7ec4\u4e2d\u3002\u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a arraylist\uff0c\u6dfb\u52a0\u65b0\u503c\uff0c\u7136\u540e\u5c06\u5176\u8f6c\u6362\u4e3a\u6570\u7ec4\u3002\n<\/p><\/blockquote>\n

\"java\u6570\u7ec4<\/p>\n

\u5982\u4f55\u5411 Java \u6570\u7ec4\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u503c<\/strong><\/p>\n

\u65b9\u6cd5\uff1a<\/strong><\/p>\n

\u5bf9\u4e8e Java \u6570\u7ec4\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4e24\u79cd\u65b9\u6cd5\u6dfb\u52a0\u4e00\u4e2a\u503c\uff1a<\/p>\n

    \n
  1. \u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u521b\u5efa\u65b0\u6570\u7ec4\uff1a<\/strong><\/li>\n<\/ol>\n
    int[] originalArray = {1, 2, 3};\nint[] newArray = Arrays.copyOf(originalArray, originalArray.length + 1);\nnewArray[newArray.length - 1] = 4;<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \n
    1. \u4f7f\u7528 ArrayList \u8f6c\u6362\u4e3a\u6570\u7ec4\uff1a<\/strong><\/li>\n<\/ol>\n
      List<Integer> list = new ArrayList<>(Arrays.asList(1, 2, 3));\nlist.add(4);\nint[] newArray = list.stream().mapToInt(i -> i).toArray();<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u6ce8\u610f\uff1a<\/strong><\/p>\n
      \u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
        \n
      • \u5bf9\u4e8e\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\uff08\u4f8b\u5982 int[]\uff09\uff0c\u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u800c\u5bf9\u4e8e\u5bf9\u8c61\u6570\u7ec4\uff08\u4f8b\u5982 String[]\uff09\uff0c\u5b83\u53ea\u4f1a\u590d\u5236\u6570\u7ec4\u7684\u5f15\u7528\u3002<\/li>\n
      •  \u4e0d\u8981<\/strong>\u5c1d\u8bd5\u76f4\u63a5\u589e\u52a0\u6570\u7ec4\u7684\u5927\u5c0f\u3002\u6570\u7ec4\u7684\u5927\u5c0f\u5728\u521b\u5efa\u65f6\u786e\u5b9a\uff0c\u65e0\u6cd5\u66f4\u6539\u3002<\/li>\n<\/ul>\n
        \u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4 \u600e\u4e48\u591a\u52a0\u4e00\u4e2a\u503c\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
        \u4e3a\u4e86\u5411 java \u6570\u7ec4\u6dfb\u52a0\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4e24\u79cd\u65b9\u6cd5\uff1a\u4f7f\u7528 arrays.copyof() \u521b\u5efa\u65b0\u6570\u7ec4\uff0c\u5e76\u5c06\u65b0\u503c\u6dfb\u52a0\u5230\u65b0\u6570\u7ec4\u4e2d\u3002\u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a arraylist\uff0c\u6dfb\u52a0\u65b0\u503c\uff0c\u7136\u540e\u5c06\u5176\u8f6c\u6362\u4e3a\u6570\u7ec4\u3002 \u5982\u4f55\u5411 Java \u6570\u7ec4\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u503c \u65b9\u6cd5\uff1a \u5bf9\u4e8e Java \u6570\u7ec4\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4e24\u79cd\u65b9\u6cd5\u6dfb\u52a0\u4e00\u4e2a\u503c\uff1a \u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u521b\u5efa\u65b0\u6570\u7ec4\uff1a int[] originalArray = {1, 2, 3}; int[] newArray = Arrays.copyOf(originalArray, originalArray.length + 1); newArray[newArray.length – 1] = 4; \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528 ArrayList \u8f6c\u6362\u4e3a\u6570\u7ec4\uff1a List<Integer> list = new ArrayList<>(Arrays.asList(1, 2, 3)); list.add(4); int[] newArray = list.stream().mapToInt(i -> i).toArray(); \u767b\u5f55\u540e\u590d\u5236 \u6ce8\u610f\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b […]<\/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-66547","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66547","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=66547"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66547\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=66547"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=66547"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=66547"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}