what is the advantage of using anonymous class in java?

Question

the subclass will automatically overide the superclass method. doesn't it?

Answer 1

Probably for encapsulation mostly. Anything you can do with an anonymous class you could also do with a nested class or a normal class, but if it's a one time use thing there's no need to do that. And yes it will override superclass methods where applicable.

Check out some examples of the use of Google's Predicate class