Question

How to define field in parent class and assign value in child to this field so it will be accessible for type Room? I think this int bound = 3; will hide parent variable…

public abstract class Room {public int bound; }

public class DarkRoom extends Room {

     bound = 3;
}

Answer 1

Assign the field in the constructor, not in the class declaration:

public class DarkRoom extends Room {
    public DarkRoom() {
        bound = 3;
    }
}