what is the sense of final ArrayList?

Question

Which advantages/disadvantages we can get by making ArrayList (or other Collection) final? I still can add to ArrayList new elements, remove elements and update it. But what

Answer 1

Essentially what you are trying to achieve here is making the list immutable I guess. However when you mark the list reference final it implies that the reference cant be pointed to any other list object other than this.

If you want a final (immutable) ArrayList go for Collections class's utility method Collections.unmodifaibleList( list ) instead.