public class Rectangle {
    
  // fields
  private int width;
  private int height;
  private Point origin;
  // add an instance variable for the object ID
  private int id;
  
  // add a class variable for the
  // number of Rectangle objects instantiated
  private static int numberOfRectangles = 0;

  // constructors
  public Rectangle(int initWidth, int initHeight, Point initOrigin) {
    width = initWidth;
    height = initHeight;
    origin = initOrigin;
    id = ++numberOfRectangles;
  }

  public int getID() {
    return id;
  }

  public static int getNumberOfRectangles() {
    return numberOfRectangles;
  }
    
  // methods
  public void setWidth(int newWidth ) {
    width = newWidth;
  }
  
  public int getWidth() {
    return width;
  }
    
  public void setHeight(int newHeight ) {
    height = newHeight;
  }
  
  public int getHeight() {
    return height;
  }
    
  public void setOrigin(Point newOrigin) {
    origin = newOrigin;
  }
  
  public Point getOrigin() {
    return origin;
  }
  
  public int getArea() {
       return width * height;
  }
   
  // Move rectangle origin by dx,dy
  public void move(int dx, int dy) {
    origin.setX( origin.getX() + dx );
    origin.setY( origin.getY() + dy );
  }
}