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Below I have a generic OuterClass, an InnerClass that use OuterClass generics and non-generic InnerInterface. public class OuterClass<E> { public class InnerClass { public E someMethod() { return null; } } public interface InnerInterface{ public void onEvent(OuterClass.InnerClass innerClass); } } In the main method below, I use two instance of OuterClass, o1 parameterized with , and o2 with . My annonymous inner class myListener tries to use the generic type of the outer class (E). The code as it is below does not compile (Integer i = innerClass.someMethod() - Type mismatch: cannot convert from Object to Integer). public class Test { public static void main(String[] args) { OuterClass<Integer> o1 = new OuterClass<Integer>(); OuterClass<String> o2 = new OuterClass<String>(); OuterClass.InnerInterface innerInterface = new OuterClass.InnerInterface() { @Override public void onEvent(InnerClass innerClass) { Integer i = innerClass.someMethod(); } }; } } I would like to express that myListener is for o1, and should use E = Integer, without repeating it (without repeating , I already say it when declaring o1). Is that possible? Many thanks! Faton.

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