Change value of the list in ArrayList

[Gunner 1]

Hello,
I have an ArrayList which contains L1 ArrayList. How do I change the value of a list L1 in the 2nd example
list1 contains
[[orange] [orange] [orange]]
And I want to add the mango 2nd list [orange] by [orange, mango]

List l2 = new ArrayList();
l2 = (ArrayList) l2.get(1);  / / 1 because it counts from 0
l2.add("Mango");

I find myself with
[[orange1, mango], [Orange, Mango], [orange, mango]]
It adds orange everywhere. I was wondering that I could change the value of the list in the arraylist. is this possible and if yes then I am interested.

[Windowed]

Hello,
Are you sure the names of your variables in your code, there as no l1 and l2. Otherwise, it would:

((List)l1.get(1)).add("Mango");

Just check your code and then again run the program and if it gives you an error post the error here. I request for the error because the error helps us find he exact problem in the code. Just do this and if you have more problems then you an post back.

[Gunner 1]

Hello,
Here is my updated code, please hava look at it and if you find some problems in it then guide me or correct me with the same.

List l2 = new ArrayList();
l2 = (ArrayList) list1.get(1);  / / 1 because it counts from 0
l2.add("Mango");

If you have any alternate solution then i am a interested candidate. Thanks in advance.

[cyber-noob]

Hello,
When creating your l1, you of doing something like:

List l2 = new ArrayList();
l2.add("orange");
List l1 = new ArrayList();
l1.add(l2);
l1.add(l2);
l1.add(l2);

try something like this

List l2 = new ArrayList();
l2.add("orange");
List l1 = new ArrayList();
l1.add(l2);
l1.add(new ArrayList(l2));
l1.add(new ArrayList(l2));

well, you have different lists all together.

[Gunner 1]

Hello,
Not actually my l1 is empty at the beginning and I travel a loop to complete and add items to some of listes2. The Code is plux I used the complex, such as oranges to illustrate the problem. Can you see my previous discussion, Initialize an ArrayList this problem the y follows. I think the solution you can is not much helpful for me. I want an alternate solution for this. if you have one then please post back it will be great for me.

[SoftWore]

Hello,
Here is another example. The idea is that when you filled your list1 you do that adds new lists to avoid putting the same. Basically, it would chose in kind:

List l1 = new ArrayList();
for (int i = 0; I <taill1; i + +) {
   l1.add(new ArrayList());
}

Hope this helps you. Try it and if you have problems then you can ask.