Type hierarchy

class Base<T, K> {   
}

class Root extends Base<Integer, Long> {}

Get all types in class hierarchy (classes and interfaces):

GenericsResolver.resove(Root).getGenericsInfo().getComposingTypes() == 
                                [Root.class, Base.class]

Print hierarchy:

GenericsResolver.resove(Root).getGenericsInfo().toString();

class Root
  extends Base<Integer, Long>

Hierarchy includes all classes and interfaces (even without declared generics).

Interface specifics

One interface may appear in multiple hierarchy "branches", but its generics will be either the same or compatible (otherwise java will simply not compile). Generics resolution will select the most specific generics. For example:

public interface Some<T, K> {}

public interface One extends Some<Long, Number> {}

public interface Two extends Some<Number, Integer> {}

public class Root implmenets One, Two {}

Generics of Some would be resolved (under Root) as [Long, Integer] (compilation from both declarations).