Looking for all interfaces implemented, including inheritance

[Lance Finney]

Hi. I'm working on some code, and we're looking for all interfaces implemented by a class, including direct implementation, implementation by superclasses, and the parents interfaces of those implemented directly.
That is, assume class A extends class B and implements interface C. Class B implements interface D, which extends E.
We'd like to do a search on interfaces for class A which would return C, D, and E.
A.class.getInterfaces returns only C. Any thoughts?

[Dave Landers]

Call getSuperclass() recursively until it returns Object (or null), calling getInterfaces() on each of the superclasses.

[Lance Finney]

I was hoping to avoid recursion
Actually, I found something good: interfaceClass.isAssignableFrom(objectClass).
It got the job done.