Java generics method overriding

Question

I have interface:

public interface CartService extends RemoteService{
     T execute(Action action);
}

Answer 1

Use

public 
    GetCartResponse execute(GetCart action) {
    //do stuff
}

as the signature for the execute method in CartService, it should work.

I ahve tested that the follwing compiles; just substituted ActionResponse with Integer, and Action with List, for convenience.

CartService:

public interface CartService {
     T execute(List action);
}

XX:

public class XX implements CartService {
    public  T execute(List action) {
        throw new UnsupportedOperationException("Not supported yet.");
    }
}