As I know, we can make the Queue by using the LinkedList<>() class.

But, when I try to add the ArrayList<Integer> element into the Queue, it doesn’t working.

So, I was finding the two of solutions to fix this issue.

1. Use Queue<ArrayList<Integer>> instead of Queue<Integer>
2. Use Queue<Integer> and add the ArrayList by Queue.addAll()

Please, tell me the best answer.

Thanks.