What happens if we override only hashCode() in a class and use it in a Set?

Question

This may not be the real world scenario but just curious to know what happens, below is the code.

I am creating a set of object of class UsingSet. Accor

Answer 1

Set will behave differently.

Uniqueness wont happen. Because unique will be achieved by both hashcode and equals methods.
output will be liked this s = [A, a, b, 1] instead of early one.

Apart that remove and contains all wont work.