ArrayList arr1 = new ArrayList();
arr1.Add(1);
arr1.Add(2); ArrayList arr2 = new ArrayList();
arr2.Add(arr1); int i = (int)((ArrayList)arr2[0])[0];
arr1.Add(1);
arr1.Add(2); ArrayList arr2 = new ArrayList();
arr2.Add(arr1); int i = (int)((ArrayList)arr2[0])[0];
arraylist arr2 = new arraylist()arr2.add(arr1);
先提醒一下,是ArrayList.
你会从ArrayList中取值吗?如果会,先从arr2中取出arr1,然后从arr1中取出你的值。