java - Generic Enum param in abstract method

I'm trying to make an abstract Object Factory and I tryied a few things and none of them worked.

What I would like to have is something like this that could be overrided:

public abstract ObjectFactory {

    public abstract  Obj createObject (Type t) ;

}

that I could extends ObjectFactory and have:

public AntFactory extends ObjectFactory {

     @Override
     public Ant createObject(AntType t) { }
}

but everything I tryied did not override the createObject method. The only thing that worked for me was:

public abstract ObjectFactory {

    public abstract Obj createObject (Type t) ;

}    

Theres something that I'm not understanding about this concept or it doesn't work for enum.

Is there a way to keep the extends of enum only in the method and still override it?