Effective Java By Joshua Bloch: Item1 - Static Factory Method

Question

I am reading the Effective Java by Joshua Bloch and I have question about Item1 Static Factory Method.

Quote[Bloch, p.7]<

Answer 1

So take for example Collections.unmodifiableList(...). It returns some implementation of List. But the implementation class's name is irrelevant. Furthermore, said class is only constructed through the static factory method.