Question

interface A<T> {

    interface B {
       // Results in non-static type variable T cannot
       // be referenced from a static context
       T foo(); 
    }

}

Is there anyway round this? Why is T seen as static when referenced from A.B?

Answer 1

All member fields of an interface are by default public, static and final.

Since inner interface is static by default, you can’t refer to T from static fields or methods.

Because T is actually associated with an instance of a class, if it were associated with a static field or method which is associated with class then it wouldn’t make any sense