You can provide the type dynamically, however the compiler doesn't do this for you automagically.
public abstract class LastActionHero(){
protected final Class hClass;
protected LastActionHero(Class hClass) {
this.hClass = hClass;
}
// use hClass how you like.
}
BTW: It not impossible to get this dynamically, but it depends on how it is used. e.g
public class Arnie extends LastActionHero { }
It is possible to determine that Arnie.class has a super class with a Generic parameter of MuscleHero.
public class Arnie extends LastActionHero { }
The generic parameter of the super class will be just H in this case.