1  public class Rectangle {
 2    public int width = 0;
 3    public int height = 0;
 4    public Point origin;
 5
 6    // four constructors
 7    public Rectangle() {
 8      origin = new Point(0, 0);
 9    }
10    public Rectangle(Point p) {
11      origin = p;
12    }
13    public Rectangle(int w, int h) {
14      this(new Point(0, 0), w, h);
15    }
16    public Rectangle(Point p, int w, int h) {
17      origin = p;
18      width = w;
19      height = h;
20    }
21
22    // a method for moving the rectangle
23    public void move(int x, int y) {
24      origin.x = x;
25      origin.y = y;
26    }
27
28    // a method for computing the area of the rectangle
29    public int area() {
30      return width * height;
31    }
32  }