{"id":64212,"date":"2025-05-03T13:12:21","date_gmt":"2025-05-03T05:12:21","guid":{"rendered":"https:\/\/fwq.ai\/blog\/64212\/"},"modified":"2025-05-03T13:12:21","modified_gmt":"2025-05-03T05:12:21","slug":"java%e4%b8%ad%e6%80%8e%e4%b9%88%e5%be%80%e6%95%b0%e7%bb%84%e6%b7%bb%e5%8a%a0%e5%85%83%e7%b4%a0-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/64212\/","title":{"rendered":"java\u4e2d\u600e\u4e48\u5f80\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20"},"content":{"rendered":"

\n \u5728 java \u4e2d\uff0c\u5411\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\u7684\u65b9\u6cd5\u53d6\u51b3\u4e8e\u6570\u7ec4\u7684\u7c7b\u578b\uff1a\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\u65e0\u6cd5\u76f4\u63a5\u6dfb\u52a0\u5143\u7d20\u3002\u5f15\u7528\u7c7b\u578b\u6570\u7ec4\u53ef\u4ee5\u4f7f\u7528\u9010\u4e2a\u6dfb\u52a0\u3001arrays.copyof() \u65b9\u6cd5\u6216 arraylist \u8f6c\u6362\u3002\u53ef\u53d8\u5927\u5c0f\u6570\u7ec4\u53ef\u4ee5\u4f7f\u7528 add() \u65b9\u6cd5\u76f4\u63a5\u6dfb\u52a0\u5143\u7d20\u3002\n<\/p><\/blockquote>\n

\"java\u4e2d\u600e\u4e48\u5f80\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u5728 Java \u4e2d\u5411\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20<\/strong><\/p>\n

\u5728 Java \u4e2d\u5411\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\u7684\u65b9\u6cd5\u53d6\u51b3\u4e8e\u6570\u7ec4\u7684\u7c7b\u578b\u548c\u521d\u59cb\u5316\u65b9\u5f0f\u3002<\/p>\n

\u4e00\u3001\u5bf9\u4e8e\u57fa\u672c\u7c7b\u578b\u6570\u7ec4<\/strong><\/p>\n

\u5bf9\u4e8e int[]\u3001double[] \u7b49\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\uff0c\u65e0\u6cd5\u76f4\u63a5\u6dfb\u52a0\u5143\u7d20\u3002\u5b83\u4eec\u7684\u5927\u5c0f\u5728\u521b\u5efa\u65f6\u56fa\u5b9a\uff0c\u4e14\u65e0\u6cd5\u52a8\u6001\u6269\u5c55\u3002<\/p>\n

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

\u4e8c\u3001\u5bf9\u4e8e\u5f15\u7528\u7c7b\u578b\u6570\u7ec4\uff08\u5bf9\u8c61\u6570\u7ec4\uff09<\/strong><\/p>\n

\u5bf9\u4e8e Object[] \u7b49\u5f15\u7528\u7c7b\u578b\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u6dfb\u52a0\u5143\u7d20\uff1a<\/p>\n

    \n
  1. \n

    \u9010\u4e2a\u6dfb\u52a0\uff1a<\/strong><\/p>\n

      \n
    • \u521b\u5efa\u4e00\u4e2a\u65b0\u5143\u7d20\u5e76\u5c06\u5176\u5206\u914d\u7ed9\u6570\u7ec4\u4e2d\u7684\u7279\u5b9a\u7d22\u5f15\u3002<\/li>\n
    • \u4f8b\u5982\uff1amyObjectArray[index] = newElement;<\/li>\n<\/ul>\n<\/li>\n
    • \n

      \u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\uff1a<\/strong><\/p>\n

        \n
      • \u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5927\u5c0f\u6bd4\u73b0\u6709\u6570\u7ec4\u5927\u4e00\u4e2a\u5143\u7d20\u3002<\/li>\n
      • \u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u5c06\u73b0\u6709\u6570\u7ec4\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\u3002<\/li>\n
      • \u5c06\u65b0\u5143\u7d20\u6dfb\u52a0\u5230\u65b0\u6570\u7ec4\u7684\u6700\u540e\u4e00\u4e2a\u7d22\u5f15\u3002<\/li>\n
      • \u4f8b\u5982\uff1amyObjectArray = Arrays.copyOf(myObjectArray, myObjectArray.length + 1);
        myObjectArray[myObjectArray.length – 1] = newElement;<\/li>\n<\/ul>\n<\/li>\n
      • \n

        \u4f7f\u7528 ArrayList\uff1a<\/strong><\/p>\n

          \n
        • \u521b\u5efa\u4e00\u4e2a ArrayList \u5bf9\u8c61\uff0c\u5e76\u5c06\u6570\u7ec4\u5143\u7d20\u6dfb\u52a0\u5230\u5176\u4e2d\u3002<\/li>\n
        • \u4f7f\u7528 toArray() \u65b9\u6cd5\u5c06 ArrayList \u8f6c\u6362\u4e3a\u6570\u7ec4\u3002<\/li>\n
        • \u4f8b\u5982\uff1a<\/li>\n<\/ul>\n
          ArrayList<Object> myArrayList = new ArrayList<>();\nfor (Object item : myObjectArray) {\n    myArrayList.add(item);\n}\nmyObjectArray = myArrayList.toArray();<\/pre>\n
           \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<\/ol>\n
          \u4e09\u3001\u5bf9\u4e8e\u53ef\u53d8\u5927\u5c0f\u7684\u6570\u7ec4\uff08List\uff09<\/strong><\/p>\n
          \u5bf9\u4e8e ArrayList\u3001LinkedList \u7b49\u53ef\u53d8\u5927\u5c0f\u7684\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u6dfb\u52a0\u5143\u7d20\uff1a<\/p>\n
            \n
          • \n
            \u4f7f\u7528 add() \u65b9\u6cd5\uff1a<\/strong><\/p>\n
              \n
            • \u76f4\u63a5\u5c06\u5143\u7d20\u6dfb\u52a0\u5230\u5217\u8868\u7684\u672b\u5c3e\u3002<\/li>\n
            • \u4f8b\u5982\uff1amyList.add(newElement);<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
              \u4ee5\u4e0a\u5c31\u662fjava\u4e2d\u600e\u4e48\u5f80\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\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\u5411\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\u7684\u65b9\u6cd5\u53d6\u51b3\u4e8e\u6570\u7ec4\u7684\u7c7b\u578b\uff1a\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\u65e0\u6cd5\u76f4\u63a5\u6dfb\u52a0\u5143\u7d20\u3002\u5f15\u7528\u7c7b\u578b\u6570\u7ec4\u53ef\u4ee5\u4f7f\u7528\u9010\u4e2a\u6dfb\u52a0\u3001arrays.copyof() \u65b9\u6cd5\u6216 arraylist \u8f6c\u6362\u3002\u53ef\u53d8\u5927\u5c0f\u6570\u7ec4\u53ef\u4ee5\u4f7f\u7528 add() \u65b9\u6cd5\u76f4\u63a5\u6dfb\u52a0\u5143\u7d20\u3002 \u5982\u4f55\u5728 Java \u4e2d\u5411\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20 \u5728 Java \u4e2d\u5411\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\u7684\u65b9\u6cd5\u53d6\u51b3\u4e8e\u6570\u7ec4\u7684\u7c7b\u578b\u548c\u521d\u59cb\u5316\u65b9\u5f0f\u3002 \u4e00\u3001\u5bf9\u4e8e\u57fa\u672c\u7c7b\u578b\u6570\u7ec4 \u5bf9\u4e8e int[]\u3001double[] \u7b49\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\uff0c\u65e0\u6cd5\u76f4\u63a5\u6dfb\u52a0\u5143\u7d20\u3002\u5b83\u4eec\u7684\u5927\u5c0f\u5728\u521b\u5efa\u65f6\u56fa\u5b9a\uff0c\u4e14\u65e0\u6cd5\u52a8\u6001\u6269\u5c55\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u4e8c\u3001\u5bf9\u4e8e\u5f15\u7528\u7c7b\u578b\u6570\u7ec4\uff08\u5bf9\u8c61\u6570\u7ec4\uff09 \u5bf9\u4e8e Object[] \u7b49\u5f15\u7528\u7c7b\u578b\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u6dfb\u52a0\u5143\u7d20\uff1a \u9010\u4e2a\u6dfb\u52a0\uff1a \u521b\u5efa\u4e00\u4e2a\u65b0\u5143\u7d20\u5e76\u5c06\u5176\u5206\u914d\u7ed9\u6570\u7ec4\u4e2d\u7684\u7279\u5b9a\u7d22\u5f15\u3002 \u4f8b\u5982\uff1amyObjectArray[index] = newElement; \u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\uff1a \u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5927\u5c0f\u6bd4\u73b0\u6709\u6570\u7ec4\u5927\u4e00\u4e2a\u5143\u7d20\u3002 \u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u5c06\u73b0\u6709\u6570\u7ec4\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\u3002 \u5c06\u65b0\u5143\u7d20\u6dfb\u52a0\u5230\u65b0\u6570\u7ec4\u7684\u6700\u540e\u4e00\u4e2a\u7d22\u5f15\u3002 \u4f8b\u5982\uff1amyObjectArray = Arrays.copyOf(myObjectArray, myObjectArray.length + 1);myObjectArray[myObjectArray.length – 1] = newElement; \u4f7f\u7528 ArrayList\uff1a \u521b\u5efa\u4e00\u4e2a ArrayList \u5bf9\u8c61\uff0c\u5e76\u5c06\u6570\u7ec4\u5143\u7d20\u6dfb\u52a0\u5230\u5176\u4e2d\u3002 \u4f7f\u7528 toArray() \u65b9\u6cd5\u5c06 ArrayList […]<\/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-64212","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64212","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=64212"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64212\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=64212"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=64212"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=64212"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}