Drawing a rectangle using a mouse

Question

Need a simple application that demostrates the use of the mouse on an application window. All that I require is that a user can draw a rectangle by dragging the mouse on the application window. The upper left coordinate should be the location where the user presses the mouse button and the lower right should be where the user releases the mouse button. Should also display the area of the rectangle in a JLabel in the SOUTH region of a BorderLayout.
Thanks

Answer 1

How is this:
import java.awt.event.*;  
import java.awt.*;
import javax.swing.*;
public class DrawR extends JFrame
     JLabel label = new JLabel();
public DrawR()
     addWindowListener(new WindowAdapter()
    {     public void windowClosing(WindowEvent ev)
          {     dispose();
               System.exit(0);
     setBounds(50,50,450,400);
     getContentPane().setLayout(new BorderLayout());
     Draw draw = new Draw();     
     getContentPane().add("Center",draw);
     getContentPane().add("South",label);
    setVisible(true);     
public class Draw extends JPanel
     Rectangle r = null;
public Draw()
     addMouseListener(new MouseAdapter()     
     {     public void mousePressed(MouseEvent m)
                r = new Rectangle(m.getX(),m.getY(),1,1);
          public void mouseReleased(MouseEvent m)
     addMouseMotionListener(new MouseMotionAdapter()          
     {     public void mouseDragged(MouseEvent m)
               r.width  = m.getX() - r.x;
               r.height = m.getY() - r.y;
               repaint();
               label.setText("   "+r);
public void paintComponent(Graphics g)
     super.paintComponent(g);
     if (r != null) ((Graphics2D)g).draw(r);
public static void main(String[] args )
     new DrawR();
Noah
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
public class DrawR extends JFrame
     JLabel label = new JLabel();
public DrawR()
     addWindowListener(new WindowAdapter()
{     public void windowClosing(WindowEvent ev)
          {     dispose();
               System.exit(0);
     setBounds(50,50,450,400);
     getContentPane().setLayout(new BorderLayout());
     Draw draw = new Draw();     
     getContentPane().add("Center",draw);
     getContentPane().add("South",label);
setVisible(true);     
public class Draw extends JPanel
     Rectangle r = null;
public Draw()
     addMouseListener(new MouseAdapter()     
     {     public void mousePressed(MouseEvent m)
               r = new Rectangle(m.getX(),m.getY(),1,1);
          public void mouseReleased(MouseEvent m)
     addMouseMotionListener(new MouseMotionAdapter()          
     {     public void mouseDragged(MouseEvent m)
               r.width = m.getX() - r.x;
               r.height = m.getY() - r.y;
               repaint();
               label.setText(" "+r);
public void paintComponent(Graphics g)
     super.paintComponent(g);
     if (r != null) ((Graphics2D)g).draw(r);
public static void main(String[] args )
     new DrawR();
}