public class AnotherPointMain {
  public static void main(String args[]) {
    Point p1 = new Point();

    p1.x = 10;
    p1.y = 20;

    System.out.println("before: p1.x=" + p1.x +
                       ", p1.y=" + p1.y);

    Point p2 = p1;

    p2.x++;
    System.out.println("after: p2.x=" + p2.x +
                       ", p2.y=" + p2.y);
    System.out.println("after: p1.x=" + p1.x +
                       ", p1.y=" + p2.y);
  }
}