javagenericsjavacompiler

Java creating a generic class that implement another generic interface with constraints

Interface to be implemented:

public interface Message {
}

public interface Handles<T extends Message>  {
    void hanlde(T message);
}

Concrete implementation:

public class EnforcementHandler<T extends Handles<T extends Message>> {

}

Unexpected bound

Is this pattern possible in Java?

Solution

  • You must write it as EnforcementHandler<M extends Message, T extends Handles<M>>.