Answer by Jonathan for Retrieve generic type information with reflection

The only way this is workable is if you subclass StringObjectKeyValueStore:

class FriendStore extends StringObjectKeyValueStore<Friend>{}

The you can resolve V for a particular type, such as KeyValueStore, using TypeTools (which I authored):

Class<?> v = TypeResolver.resolveRawArguments(KeyValueStore.class, FriendStore.class)[1];assert v == Friend.class;