Java reflection - Get actual type of T in a generic interface

How do I get the actual type of T in a generic interface?

Given the following class:

class myClazz {
        private final IGenericInterface<?> genericInterface;

        myClazz(final IGenericInterface<otherClazz> genericInterface){
            this.genericInterface = genericInterface;
        }
}

How do I get the simple name of otherClazz out of the constructor using reflection?

I tried the following:

String otherClazzString = myClazz.class.getConstructors()[0].getParameterTypes()[0].toString(); // 

but I do not know what to do next to obtain the simple name of the actual type used in the generic interface.