Question

public interface Interface1<E extends Interface1<E,F>,F extends Interface2<E,F>>{
    public Q<E,F> do();
}

public interface Interface1<E extends Interface1<E,F>,F extends Interface2<E,F>>{
    public doTo(Q<E,F> arg);
}

is this ok because me is using interface name in the generic part within the same interface, like E extends Interface1… being called in Interface1.

Is this ok?

Answer 1

Yes this is ‘okay’ to do, but you should probably complete the generic type for Interface1 and Interface2

public class Q<E extends Interface1<E, F>, F extends Interface2<E, F>>{
    E interface1;
    F interface2;
}