Java — Initializing superclass variables in subclasses?

Question

Okay, so, for example, let\'s say I have an abstract class called \"Vehicle\". The Vehicle class, has, among other things, a static variable called wheels, which is not init

Answer 1

Static members are only defined once and are common to every extending class. Changing the value in one of them will affect all of the others. This is what I believe you really want to achieve:

public abstract class Vehicle {
    private int _wheels; //number of wheels on the vehicle
    public int getWheels(){return _wheels;}

    protected Vehicle(int wheels){
        _wheels = wheels;
    }
}

public class Motorcycle extends Vehicle {
    public Motorcycle(){
        super(2);
    }
}

public class Car extends Vehicle {
    public Car(){
        super(4);
    }
}