Question

I have an abstract class and in that abstract class I have an array and I want every class that extends it to have the array 2 ints long no matter what. I know you can define array size in methods but thats all you can do it in. Here’s some code

public abstract class entity{

int pos[]

// want this variable to be two ints long no matter what extends it
}

Is this possible?

Answer 1

You could instantiate the array in the superclass and limit the access to it with methods. That way no subclass can change the size of the array.

private int[] pos = new int[2];

protected void setPos(int index, int value) {
    pos[index] = value;
}

protected int getPos(int index) {
    return pos[index];
}