{"id":117,"date":"2023-03-05T23:14:33","date_gmt":"2024-02-19T20:25:41","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8java-list%e7%9a%84add%e5%92%8caddall%e6%96%b9%e6%b3%95\/"},"modified":"2025-08-01T00:12:49","modified_gmt":"2025-07-31T16:12:49","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8java-list%e7%9a%84add%e5%92%8caddall%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8java-list%e7%9a%84add%e5%92%8caddall%e6%96%b9%e6%b3%95\/","title":{"rendered":"Java List\u6df1\u5ea6\u89e3\u6790\uff1aadd()\u4e0eaddAll()\u65b9\u6cd5\u7684\u9ad8\u6548\u4f7f\u7528\u6307\u5357"},"content":{"rendered":"

Java List\u7684add()\u548caddAll()\u65b9\u6cd5\u8be6\u89e3<\/h3>\n

\u5728\u672c\u6587\u4e2d\uff0c\u60a8\u5c06\u6df1\u5165\u5b66\u4e60Java\u4e2dList\u63a5\u53e3\u7684add()<\/code>\u548caddAll()<\/code>\u65b9\u6cd5\u3002<\/p>\n

Java List\u7684add()\u65b9\u6cd5<\/h2>\n

add()<\/code>\u65b9\u6cd5\u7528\u4e8e\u5411\u5217\u8868\u4e2d\u6dfb\u52a0\u5143\u7d20\u3002\u5b83\u4e3b\u8981\u6709\u4e24\u79cd\u91cd\u8f7d\u5f62\u5f0f\uff1a<\/p>\n

    \n
  1. add(E e)<\/code>:<\/strong> \u6b64\u65b9\u6cd5\u5c06\u6307\u5b9a\u7684\u5143\u7d20\u6dfb\u52a0\u5230\u5217\u8868\u7684\u672b\u5c3e\u3002\u7531\u4e8eList\u652f\u6301\u6cdb\u578b\uff0c\u56e0\u6b64\u53ef\u4ee5\u6dfb\u52a0\u7684\u5143\u7d20\u7c7b\u578b\u5728\u521b\u5efaList\u65f6\u5c31\u5df2\u7ecf\u786e\u5b9a\u3002<\/li>\n
  2. add(int index, E element)<\/code>:<\/strong> \u6b64\u65b9\u6cd5\u5728\u5217\u8868\u4e2d\u6307\u5b9a\u7684\u7d22\u5f15\u4f4d\u7f6e\u63d2\u5165\u5143\u7d20\u3002\u63d2\u5165\u540e\uff0c\u539f\u5148\u5728\u8be5\u7d22\u5f15\u4f4d\u7f6e\u53ca\u4e4b\u540e\u7684\u6240\u6709\u5143\u7d20\u90fd\u4f1a\u5411\u53f3\u79fb\u52a8\u4e00\u4f4d\u3002\u5982\u679c\u7ed9\u5b9a\u7684\u7d22\u5f15\u8d85\u51fa\u5f53\u524d\u5217\u8868\u7684\u6709\u6548\u8303\u56f4\uff08\u5373\u5c0f\u4e8e0\u6216\u5927\u4e8e\u5217\u8868\u5927\u5c0f\uff09\uff0c\u8be5\u65b9\u6cd5\u5c06\u629b\u51faIndexOutOfBoundsException<\/code>\u5f02\u5e38\u3002<\/li>\n<\/ol>\n

    List add()\u65b9\u6cd5\u793a\u4f8b<\/h3>\n
    package<\/span> com.<\/span>scdev.<\/span>examples<\/span>;<\/span>\r\n\r\nimport<\/span> java.<\/span>util.<\/span><\/span>ArrayList<\/span><\/span>;<\/span>\r\nimport<\/span> java.<\/span>util.<\/span><\/span>List<\/span><\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> ListAddExamples<\/span> {\r\n\r\n\tpublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {\r\n\r\n\t\tList<\/span><<\/span>String<\/span>><\/span><\/span> vowels =<\/span> new<\/span> ArrayList<\/span><<\/span>><\/span><\/span>(<\/span>)<\/span>;<\/span>\r\n\r\n\t\tvowels.<\/span>add<\/span>(<\/span>\"A\"<\/span>)<\/span>;<\/span> \/\/ [A]<\/span>\r\n\t\tvowels.<\/span>add<\/span>(<\/span>\"E\"<\/span>)<\/span>;<\/span> \/\/ [A, E]<\/span>\r\n\t\tvowels.<\/span>add<\/span>(<\/span>\"U\"<\/span>)<\/span>;<\/span> \/\/ [A, E, U]<\/span>\r\n\r\n\t\tSystem<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>vowels)<\/span>;<\/span> \/\/ \u8f93\u51fa: [A, E, U]<\/span>\r\n\r\n\t\tvowels.<\/span>add<\/span>(<\/span>2<\/span>,<\/span> \"I\"<\/span>)<\/span>;<\/span> \/\/ [A, E, I, U]<\/span>\r\n\t\tvowels.<\/span>add<\/span>(<\/span>3<\/span>,<\/span> \"O\"<\/span>)<\/span>;<\/span> \/\/ [A, E, I, O, U]<\/span>\r\n\r\n\t\tSystem<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>vowels)<\/span>;<\/span> \/\/ \u8f93\u51fa: [A, E, I, O, U]<\/span>\r\n\t}\r\n}<\/code><\/pre>\n
    \u4e0a\u8ff0\u4ee3\u7801\u9996\u5148\u4f1a\u5411vowels<\/code>\u5217\u8868\u4e2d\u4f9d\u6b21\u6dfb\u52a0\u201cA\u201d\u3001\u201cE\u201d\u548c\u201cU\u201d\uff0c\u6b64\u65f6\u5217\u8868\u5185\u5bb9\u4e3a[A, E, U]<\/code>\uff0c\u5e76\u5c06\u5176\u8f93\u51fa\u5230\u63a7\u5236\u53f0\u3002<\/p>\n
    \u63a5\u7740\uff0c\u4ee3\u7801\u4f1a\u5728\u7d22\u5f15\u4e3a2\u7684\u4f4d\u7f6e\u63d2\u5165\u201cI\u201d\uff0c\u4f7f\u5f97\u5217\u8868\u53d8\u4e3a[A, E, I, U]<\/code>\u3002\u7136\u540e\uff0c\u5728\u7d22\u5f15\u4e3a3\u7684\u4f4d\u7f6e\u63d2\u5165\u201cO\u201d\uff0c\u6700\u7ec8\u5217\u8868\u53d8\u4e3a[A, E, I, O, U]<\/code>\u3002\u6700\u540e\uff0c\u5c06\u66f4\u65b0\u540e\u7684\u5217\u8868\u5185\u5bb9\u8f93\u51fa\u5230\u5c4f\u5e55\u3002<\/p>\n
    Java List\u7684addAll()\u65b9\u6cd5<\/h2>\n
    Java List\u7684addAll()\u65b9\u6cd5\u8be6\u89e3<\/h3>\n
    addAll()<\/code> \u65b9\u6cd5\u7528\u4e8e\u5c06\u6307\u5b9a\u96c6\u5408\u4e2d\u7684\u6240\u6709\u5143\u7d20\u6dfb\u52a0\u5230\u5217\u8868\u4e2d\u3002\u8be5\u65b9\u6cd5\u6709\u4e24\u4e2a\u91cd\u8f7d\u5f62\u5f0f\uff1a<\/p>\n
      \n
    1. addAll(Collection<? extends E> c)<\/code>: \u6b64\u65b9\u6cd5\u5c06\u7ed9\u5b9a\u96c6\u5408 c<\/code> \u4e2d\u7684\u6240\u6709\u5143\u7d20\u9644\u52a0\u5230\u5f53\u524d\u5217\u8868\u7684\u672b\u5c3e\u3002\u5143\u7d20\u7684\u63d2\u5165\u987a\u5e8f\u53d6\u51b3\u4e8e\u96c6\u5408\u8fed\u4ee3\u5668\u8fd4\u56de\u7684\u987a\u5e8f\u3002<\/li>\n
    2. addAll(int index, Collection<? extends E> c)<\/code>: \u4f7f\u7528\u6b64\u65b9\u6cd5\u53ef\u4ee5\u5c06\u96c6\u5408 c<\/code> \u4e2d\u7684\u5143\u7d20\u4ece\u5217\u8868\u7684\u6307\u5b9a\u7d22\u5f15 index<\/code> \u5904\u63d2\u5165\u3002\u63d2\u5165\u65f6\uff0c\u5217\u8868\u4e2d\u4f4d\u4e8e\u8be5\u7d22\u5f15\u53ca\u5176\u4e4b\u540e\u7684\u6240\u6709\u73b0\u6709\u5143\u7d20\u90fd\u5c06\u5411\u53f3\u79fb\u52a8\uff0c\u4e3a\u65b0\u5143\u7d20\u817e\u51fa\u7a7a\u95f4\u3002<\/li>\n<\/ol>\n
      \u4ee5\u4e0b\u662f List addAll()<\/code> \u65b9\u6cd5\u7684\u793a\u4f8b\uff1a<\/p>\n
      package<\/span> com.<\/span>scdev.<\/span>examples<\/span>;<\/span>\r\n\r\nimport<\/span> java.<\/span>util.<\/span><\/span>ArrayList<\/span><\/span>;<\/span>\r\nimport<\/span> java.<\/span>util.<\/span><\/span>Arrays<\/span><\/span>;<\/span>\r\nimport<\/span> java.<\/span>util.<\/span><\/span>List<\/span><\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> ListAddAllExamples<\/span> {\r\n\r\n\t<\/span>public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {\r\n\r\n\t\t<\/span>List<\/span><<\/span>Integer<\/span>><\/span><\/span> primeNumbers =<\/span> new<\/span> ArrayList<\/span><<\/span>><\/span><\/span>(<\/span>)<\/span>;\r\n\r\n\t\t<\/span>primeNumbers.<\/span>addAll<\/span>(<\/span>Arrays<\/span>.<\/span>asList<\/span>(<\/span>2<\/span>,<\/span> 7<\/span>,<\/span> 11<\/span>)<\/span>)<\/span>;\r\n\r\n\t\t<\/span>System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>primeNumbers)<\/span>;<\/span> \/\/ [2, 7, 11]<\/span>\r\n\r\n\t\t<\/span>primeNumbers.<\/span>addAll<\/span>(<\/span>1<\/span>,<\/span> Arrays<\/span>.<\/span>asList<\/span>(<\/span>3<\/span>,<\/span> 5<\/span>)<\/span>)<\/span>;\r\n\r\n\t\t<\/span>System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>primeNumbers)<\/span>;<\/span> \/\/ [2, 3, 5, 7, 11]<\/span>\r\n\t}\r\n<\/span>}\r\n<\/code><\/pre>\n
      \u9996\u5148\uff0c\u8fd9\u6bb5\u4ee3\u7801\u521b\u5efa\u4e86\u4e00\u4e2a\u540d\u4e3a primeNumbers<\/code> \u7684 ArrayList<\/code>\uff0c\u5e76\u4f7f\u7528 addAll()<\/code> \u65b9\u6cd5\u521d\u59cb\u5316\u5b83\uff0c\u4f7f\u5176\u5305\u542b\u5143\u7d20 [2, 7, 11]<\/code>\u3002\u7136\u540e\uff0c\u5c06\u8be5\u5217\u8868\u7684\u5185\u5bb9\u8f93\u51fa\u5230\u63a7\u5236\u53f0\u3002<\/p>\n
      \u63a5\u7740\uff0c\u4ee3\u7801\u518d\u6b21\u8c03\u7528 addAll()<\/code> \u65b9\u6cd5\uff0c\u4f46\u8fd9\u6b21\u662f\u5728\u6307\u5b9a\u7d22\u5f15 1<\/code> \u5904\u63d2\u5165\u7531 [3, 5]<\/code> \u7ec4\u6210\u7684\u96c6\u5408\u3002\u8fd9\u610f\u5473\u7740 3<\/code> \u548c 5<\/code> \u5c06\u88ab\u63d2\u5165\u5230\u5f53\u524d\u5217\u8868\u7684\u7b2c\u4e8c\u4e2a\u4f4d\u7f6e\uff08\u7d22\u5f15\u4e3a1\uff09\u3002\u7ed3\u679c\u5c06\u662f\u4e00\u4e2a\u5305\u542b [2, 3, 5, 7, 11]<\/code> \u7684\u5217\u8868\uff0c\u5e76\u518d\u6b21\u8f93\u51fa\u5230\u63a7\u5236\u53f0\u3002<\/p>\n
      \u4f7f\u7528List\u7684add()\u65b9\u6cd5\u5f15\u53d1\u7684UnsupportedOperationException<\/h2>\n
      List\u7684add()\u548caddAll()\u65b9\u6cd5\uff1a\u64cd\u4f5c\u53ef\u9009\u6027\u4e0eUnsupportedOperationException<\/h2>\n
      \u5728Java\u4e2d\uff0cList<\/code>\u63a5\u53e3\u7684add()<\/code>\u548caddAll()<\/code>\u65b9\u6cd5\u5728\u6587\u6863\u4e2d\u88ab\u6807\u8bb0\u4e3a\u201c\u53ef\u9009\u64cd\u4f5c\u201d\u3002\u8fd9\u610f\u5473\u7740\u67d0\u4e9bList<\/code>\u7684\u5b9e\u73b0\u53ef\u80fd\u4e0d\u652f\u6301\u8fd9\u4e9b\u6dfb\u52a0\u5143\u7d20\u7684\u64cd\u4f5c\u3002\u5f53\u5c1d\u8bd5\u5bf9\u4e0d\u652f\u6301\u6dfb\u52a0\u64cd\u4f5c\u7684\u5217\u8868\u6267\u884cadd()<\/code>\u65b9\u6cd5\u65f6\uff0c\u4f1a\u629b\u51faUnsupportedOperationException<\/code>\u5f02\u5e38\u3002<\/p>\n
      \u4ee5\u4e0b\u662f\u4e24\u79cd\u5e38\u89c1\u7684\u5bfc\u81f4UnsupportedOperationException<\/code>\u7684\u60c5\u51b5\uff1a<\/p>\n
        \n
      1. \n
        Arrays.asList()<\/code>\uff1a\u8fd4\u56de\u56fa\u5b9a\u5927\u5c0f\u7684\u5217\u8868<\/h3>\n
        Arrays.asList()<\/code>\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u7531\u6307\u5b9a\u6570\u7ec4\u652f\u6301\u7684\u56fa\u5b9a\u5927\u5c0f\u7684\u5217\u8868\u3002\u56e0\u6b64\uff0c\u4efb\u4f55\u5c1d\u8bd5\u66f4\u6539\u6b64\u5217\u8868\u5927\u5c0f\u7684\u64cd\u4f5c\uff08\u4f8b\u5982\u6dfb\u52a0\u6216\u5220\u9664\u5143\u7d20\uff09\u90fd\u4f1a\u629b\u51faUnsupportedOperationException<\/code>\u5f02\u5e38\u3002<\/p>\n<\/li>\n
      2. \n
        Collections.unmodifiableList(List l)<\/code>\uff1a\u8fd4\u56de\u4e0d\u53ef\u4fee\u6539\u7684\u89c6\u56fe<\/h3>\n
        Collections.unmodifiableList()<\/code>\u65b9\u6cd5\u8fd4\u56de\u7ed9\u5b9a\u5217\u8868\u7684\u4e0d\u53ef\u4fee\u6539\u89c6\u56fe\u3002\u8fd9\u610f\u5473\u7740\u4f60\u4e0d\u80fd\u901a\u8fc7\u8fd9\u4e2a\u89c6\u56fe\u6765\u4fee\u6539\u539f\u59cb\u5217\u8868\u3002\u56e0\u6b64\uff0c\u5bf9\u8fd9\u4e2a\u4e0d\u53ef\u4fee\u6539\u7684\u89c6\u56fe\u6267\u884cadd()<\/code>\u64cd\u4f5c\u4f1a\u629b\u51faUnsupportedOperationException<\/code>\u5f02\u5e38\u3002<\/p>\n<\/li>\n<\/ol>\n
        \u793a\u4f8b\u4e00\uff1a\u5728\u56fa\u5b9a\u5927\u5c0f\u7684\u5217\u8868\u4e0a\u4f7f\u7528add\u64cd\u4f5c\u5f15\u53d1UnsupportedOperationException<\/h3>\n
        \u4ee5\u4e0b\u793a\u4f8b\u5c55\u793a\u4e86\u5728\u7531Arrays.asList()<\/code>\u521b\u5efa\u7684\u56fa\u5b9a\u5927\u5c0f\u5217\u8868\u4e0a\u6267\u884c\u6dfb\u52a0\u64cd\u4f5c\u65f6\u5982\u4f55\u5f15\u53d1UnsupportedOperationException<\/code>\uff1a<\/p>\n
        jshell> List<Integer> ints = Arrays.asList(1, 2, 3);\r\nints ==> [1, 2, 3]\r\n\r\njshell> ints.add(4);\r\n|  Exception java.lang.UnsupportedOperationException\r\n|        at AbstractList.add (AbstractList.java:153)\r\n|        at AbstractList.add (AbstractList.java:111)\r\n|        at (#4:1)\r\n<\/code><\/pre>\n
        \u9996\u5148\uff0c\u8fd9\u6bb5\u4ee3\u7801\u521b\u5efa\u4e86\u4e00\u4e2a\u56fa\u5b9a\u5927\u5c0f\u7684\u5217\u8868[1, 2, 3]<\/code>\u3002\u7136\u540e\uff0c\u5b83\u5c1d\u8bd5\u5411\u8be5\u5217\u8868\u6dfb\u52a0\u5143\u7d204<\/code>\u3002\u7ed3\u679c\uff0c\u629b\u51fa\u4e86\u4e00\u4e2aUnsupportedOperationException<\/code>\u5f02\u5e38\uff0c\u660e\u786e\u6307\u51fa\u8be5\u64cd\u4f5c\u4e0d\u88ab\u652f\u6301\u3002<\/p>\n
        \u793a\u4f8b\u4e8c\uff1a\u5bf9\u7ed9\u5b9a\u5217\u8868\u7684\u4e0d\u53ef\u4fee\u6539\u89c6\u56fe\u6267\u884cadd\u64cd\u4f5c\u5f15\u53d1UnsupportedOperationException<\/h3>\n
        \u4ee5\u4e0b\u793a\u4f8b\u5c55\u793a\u4e86\u5bf9\u7531Collections.unmodifiableList()<\/code>\u521b\u5efa\u7684\u4e0d\u53ef\u4fee\u6539\u89c6\u56fe\u6267\u884c\u6dfb\u52a0\u64cd\u4f5c\u65f6\u5982\u4f55\u5f15\u53d1UnsupportedOperationException<\/code>\uff1a<\/p>\n
        jshell> List<String> strs = new ArrayList<>();\r\nstrs ==> []\r\n\r\njshell> strs.add(\"A\");\r\n$6 ==> true\r\n\r\njshell> List<String> strs1 = Collections.unmodifiableList(strs);\r\nstrs1 ==> [A]\r\n\r\njshell> strs1.add(\"B\");\r\n|  Exception java.lang.UnsupportedOperationException\r\n|        at Collections$UnmodifiableCollection.add (Collections.java:1058)\r\n|        at (#8:1)\r\n<\/code><\/pre>\n
        \u9996\u5148\uff0c\u6b64\u4ee3\u7801\u5c06\u5b57\u7b26\u4e32\u201cA\u201d\u6dfb\u52a0\u5230\u4e00\u4e2aArrayList<\/code>\u4e2d\u3002\u63a5\u4e0b\u6765\uff0c\u5b83\u521b\u5efa\u4e86\u8be5\u5217\u8868\u7684\u4e00\u4e2a\u4e0d\u53ef\u4fee\u6539\u89c6\u56festrs1<\/code>\u3002\u7136\u540e\uff0c\u5c1d\u8bd5\u901a\u8fc7strs1<\/code>\u5411\u5217\u8868\u4e2d\u6dfb\u52a0\u5b57\u7b26\u4e32\u201cB\u201d\u3002\u8fd9\u5c06\u5bfc\u81f4\u629b\u51faUnsupportedOperationException<\/code>\u5f02\u5e38\uff0c\u56e0\u4e3astrs1<\/code>\u662f\u4e00\u4e2a\u4e0d\u53ef\u4fee\u6539\u7684\u89c6\u56fe\u3002<\/p>\n
        \u7ed3\u8bba<\/h2>\n
        \u901a\u8fc7\u672c\u6587\uff0c\u60a8\u6df1\u5165\u4e86\u89e3\u4e86Java List<\/code>\u63a5\u53e3\u7684add()<\/code>\u548caddAll()<\/code>\u65b9\u6cd5\uff0c\u7279\u522b\u662f\u5b83\u4eec\u7684\u53ef\u9009\u6027\u4ee5\u53ca\u5728\u4f55\u79cd\u60c5\u51b5\u4e0b\u4f1a\u629b\u51faUnsupportedOperationException<\/code>\u3002\u7406\u89e3\u8fd9\u4e9b\u6982\u5ff5\u5bf9\u4e8e\u7f16\u5199\u5065\u58ee\u7684Java\u96c6\u5408\u4ee3\u7801\u81f3\u5173\u91cd\u8981\u3002<\/p>\n
        \u63a8\u8350\u9605\u8bfb\uff1a<\/h3>\n