public class Test {
    public static void main(String[] args) {
        Sub sub = new Sub();
        System.out.println(sub.getWidth());
    }
}

class Sub extends Base {    
    private Dimension size;
    
    public Sub() {        
        this.size = new Dimension(50, 50);
    }
    
    public Dimension getSize() {
        return size;
    }
}

class Base {    
    private int width;
    private int height;
    private Dimension size = new Dimension(20, 20);
    
    Base() {        
        this.width = getSize().width;
        this.height = getSize().height;
    }
    
    Dimension getSize() {
        return size;
    }
    
    int getWidth() {
        return width;
    }
    
    int getHeight() {
        return height;
    }
}