Generic class that accepts either of two types

Question

I want to make a generic class of this form:

class MyGenericClass {}

Problem is, I want to be acceptable for T to b

Answer 1

No, there's nothing in Java generics to allow this. You might want to consider having a non-generic interface, implemented by FooIntegerImpl and FooLongImpl. It's hard to say without knowing more about what you're trying to achieve.