Java ArrayList copy

Question

I have an ArrayList l1 of size 10. I assign l1 to new list reference type l2. Will l1 and l2 po

Answer 1

Yes l1 and l2 will point to the same reference, same object.

If you want to create a new ArrayList based on the other ArrayList you do this:

List l1 = new ArrayList();
l1.add("Hello");
l1.add("World");
List l2 = new ArrayList(l1); //A new arrayList.
l2.add("Everybody");

The result will be l1 will still have 2 elements and l2 will have 3 elements.