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Now it works. Thank you.

Do you mean
final ArrayList<List<Integer>> someList = new ArrayList<List<Integer>>(); ?

When I write as you said to, I get this error: type parameter List<java.lang.Integer> is not within...

I want to make a generic list class for, let's say, storing a graph. For each node (raging from 1 to n) I keep a linked list for it's neighbors. But I don't want to make an array of lists. I want to...