Gradient in Java Swing Example

import javax.swing.*; 
 import java.awt.*; 
 import java.awt.geom.*; 
 public class JGradientJavaExample extends JFrame 
 { 
     public void paint(Graphics gr) 
        { 
                         super.paint(gr); 
                         int x = 20, y = 40, x2 = 160, y2 = 80; 
                         Graphics2D GR2D = (Graphics2D)gr; 
                         GR2D.setPaint(new GradientPaint(x, y, Color.LIGHT_GRAY, 
                         x2, y2, Color.DARK_GRAY, false)); 
                         GR2D.fill(new Rectangle2D.Double(x, y, x2, y2)); 
                         x = 200; 
                         GR2D.setPaint(new GradientPaint(x, y, Color.LIGHT_GRAY, 
                         x2, y2, Color.DARK_GRAY, true)); 
                         GR2D.fill(new Rectangle2D.Double(x, y, x2, y2)); 
        } 
                        public static void main(String[] gs) 
                          { 
                               JGradientJavaExample frm = new JGradientJavaExample(); 
                               frm.setSize(440,180); 
                               frm.setVisible(true); 
                          } 
 }