public class Rectangle {
    
  // the Rectangle class has 3 fields
  private int width;
  private int height;
  private Point origin;
  
  private int id = initializeId();
 
  // add a class variable for the
  // number of Rectangle objects instantiated
  private static int numberOfRectangles = initNumberOfRectangles();
    
  public Rectangle(int initWidth, int initHeight, Point initOrigin) {
    this(initHeight, initHeight);
    origin = initOrigin;
  }
  
  public Rectangle(int initWidth, int initHeight) {
    width = initWidth;
    height = initHeight;
    origin = new Point(0,0);
    id = ++numberOfRectangles;
    System.out.println("Initialized object id in constructor, id:" + id);
  }
  
  
  // static method for initializing static variable.
  private static int initNumberOfRectangles() {
    System.out.println("initialize numberOfRectangles in static method");
    return 0;
  }

  //static initialization block 
  static {
    System.out.println("initialize numberOfRectangles in static block");
    numberOfRectangles = 0;
  }

  //non-static initialization block 
  {
    id = 100;
    System.out.println("initialize objectId in block, id: " + id);
  }
  
  //final method
  private final int initializeId() {
    int _id = 200;
    System.out.println("initialize objectId in final method, id: " + _id  );
    return _id;
  }
  
  public int getID() {
    return id;
  }
 
  public static int getNumberOfRectangles() {
    return numberOfRectangles;
  }
    
  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 x,y
  public void move(int dx, int dy) {
    origin.setX( origin.getX() + dx );
    origin.setY( origin.getY() + dy );
  }
  
  public String toString(String objName) {
      return "["+objName+"." + id + "] Width: " + width + ", Height: " + height + ", Origin: " + origin;
  }
  
  public static void main(String []args) {
    System.out.println("-------------------------------");
    Point p = new Point(10,20);
    Rectangle rectOne = new Rectangle(30,40, p);
    System.out.println(rectOne.toString("rectOne"));
    System.out.println("-------------------------------");
    System.out.println("Number of Rectangles: " + getNumberOfRectangles() );
  }
}