gistfile1.java

import java.awt.*;
import java.awt.geom.*;
import java.awt.event.*;
import javax.swing.*;


public class app {
  public static void main(String [] args) {
    Window w = new Window();
    w.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    w.show();
  }
      
  public static void out(Object obj) {
    System.out.println(obj);
  }
}


class Window extends JFrame {
  public Window() {
    setSize(WIDTH, HEIGHT);

    Point coord = new Point(50, 50);
    XRectangle rect = new XRectangle(coord);

    Container cont = getContentPane();
    cont.add(rect);
  }

  private static final int WIDTH  = 400;
  private static final int HEIGHT = 400;
}


class XRectangle extends Component implements MouseMotionListener {
   public XRectangle(Point coord) {
      super();

      this.coord = coord; 
      rect = new Rectangle2D.Double();

      addMouseMotionListener(this);
   }

   public void paint(Graphics g) {
      Graphics2D g2 = (Graphics2D)g;

      setBounds(coord.x, coord.y, width + 1, height + 1);
      rect.setRect(rectX, rectY, width, height);

      g2.draw(rect);

      app.out("paint rec");
   }


   public void mouseDragged(MouseEvent e) {
     app.out("Mouse Dragged");
     width  = e.getX();
     height = e.getY();

     repaint();
   }

   public void mouseMoved(MouseEvent e) {
   }


   private Point coord;
   private int width = 150, height = 150;
   private Rectangle2D rect;
   private int rectX = 0, rectY = 0;
}