java中指定删除list对应元素

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public static void rmListtest(){String str[] = {"1","2","3","4","5","6","7","8"};List<String> list = new ArrayList<String>();for(int i=0; i<str.length; i++){list.add(str[i]);}System.out.println(list);int[] pos = {2,3,5,6,7};for(int j=pos.length-1; j>=0; j--){list.remove(pos[j]);System.out.println(list);}System.out.println("=========================");list = new ArrayList<String>();for(int i=0; i<str.length; i++){list.add(str[i]);}System.out.println(list);for(int j=0; j<pos.length; j++){list.set(pos[j],null);System.out.println(list);}}

结果：

[1, 2, 3, 4, 5, 6, 7, 8][1, 2, 3, 4, 5, 6, 7][1, 2, 3, 4, 5, 6][1, 2, 3, 4, 5][1, 2, 3, 5][1, 2, 5]=========================[1, 2, 3, 4, 5, 6, 7, 8][1, 2, null, 4, 5, 6, 7, 8][1, 2, null, null, 5, 6, 7, 8][1, 2, null, null, 5, null, 7, 8][1, 2, null, null, 5, null, null, 8][1, 2, null, null, 5, null, null, null]

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