class Ball extends Throwable {} 
class P { 
    P target;
    P(P target) { 
        this.target = target;
    }
    void aim(Ball ball) { 
        try { 
            throw ball; 
        }
        catch (Ball b) { 
            target.aim(b);
        }
    }
    public static void main(String[] args) { 
        p parent = new P(null);
        p child = new P(parent);
        parent.target = child; 
        parent.aim(new Ball());
    }
}
{{Title text: I'm trying to build character but Eclipse is really confusing.}}