/* Jeremy Lipschutz
   This class practices reference semantics and the
   x = change(x) pattern
*/
public class PointClient {
   public static void main(String[] args) {
      Point p = new Point(1, 2);
      change1(p);
      System.out.println(p);
      p = change2(p);  // x = change(x)
      System.out.println(p);
   }
   
   public static void change1(Point p) {
      p.x = 14;
   }
   
   public static Point change2(Point p) {
      p = new Point(7, 8);
      return p;
   }
}