// This class is a client of the Point1 class, that
// is, it creates Point1 objects and uses them.
//
// Java can run this file as a program since it has
// a public static void main(String[] args) method.
public class PointClient2 {
   
   public static void main(String[] args) {
      Point2 p1 = new Point2();
      p1.x = 5;
      p1.y = 10;
      Point2 p2 = new Point2();
      p2.x = 3;
      p2.y = -8;
      
      // We could translate the points manually
      // like this, but it is better to make a method.
      //p1.x += 2;
      //p1.y += 3;
      //p2.x += 4;
      //p2.y += 8;
      
      translate(p1, 2, 3);
      translate(p2, 4, 8);
      
      System.out.println("p1 = " + p1.x + ", " + p1.y);
      System.out.println("p2 = " + p2.x + ", " + p2.y);
      
   }
   
   // This method takes a point and adds dx to the x
   // and dy to the y.
   // This is considered bad style as the Point class
   // should do this itself.
   // Note: The word "static" means that this isn't 
   // part of a blueprint for creating objects.
   public static void translate(Point2 p, int dx, int dy){
      p.x += dx;
      p.y += dy;
   }
}