Is there anything wrong with a class with all static methods?

Question

I\'m doing code review and came across a class that uses all static methods. The entrance method takes several arguments and then starts calling the other static methods passin

Answer 1

Nothing is wrong with it. It is a more "functional" way to code. It can be easier to test (because no internal state) and better performance at runtime (because no overhead to instance an otherwise useless object).

But you immediately lose some OO capabilities Static methods don't respond well (at all) to inheritance. A static class cannot participate in many design patterns such as factory/ service locator.