I don't think that's possible, well it doesn't make sense to have that construct.
When you specify your parameters using A & B then you know that you will be able to call the methods of A and B on the instance that you have, but if you would be able to specify A OR B then it would be ambiguous to the compiler whether you can call A.a() or you can call B.b();
If you have the need for such a construct you're likely to have design issues, post your code and we might be able to help
Seeing your code, maybe you should use an Adapter around the JFrame and JComponent that will hide the duplicated code, though JFrame and JComponent are both Container, can you not use that?
