public class PointTest extends Thread{

    Point point;

    public PointTest(Point point){
	this.point = point;
    }

    public void run(){
	point.increment();
    }

    public static void main(String args[]){
	Point myPoint = new Point(0.0,0.0);
	PointTest myThread1 = new PointTest(myPoint);
	PointTest myThread2 = new PointTest(myPoint);
	myThread1.start(); myThread2.start();
	System.out.println(myPoint);
    }

}