Problem at displaying animated gif images !!!!!!!!!!!!

Question

hello everyone......i am trying to display an animated gif image..............so till far i have no issues on this....
but i face problem when :
i have created a class called SimpleGame which extends JPanel....
public class SimpleGame extends JPanel
//code
public void paintComponent(Graphics g)
//code to draw image
}now i have written another class with main method
public class MyGame extends SimpleGame
public MyGame()
        JFrame frame=new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(800, 600);
        frame.setUndecorated(true);
        frame.setLocationRelativeTo(null);
        frame.getContentPane().add(this);
        frame.setVisible(true);
        this.repaint();
}so image gets displayed but only one frame of animated image......image that is displayed is static.....since it is a animated gif,,,,,so some how animation is not rendered......only one frame is displayed......
why is it happening ??
if i try to display animated image from a single class i mean my paintComponent method and main method is at same class then i do not face problem.....
but if my paint method is in another class and i am using that method from another class then animation does not get rendered.........
any help !!!!! please...........

Answer 1

class SimpleGame extends JPanel
Image img=new ImageIcon("y.gif");
public void paintComponent(Graphics g)
g.drawImage(img,150,150,this);
}main class//
class MyGame extends SimpleGame
public MyGame()
        JFrame frame=new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(800, 600);
        frame.setUndecorated(true);
        frame.setLocationRelativeTo(null);
        frame.getContentPane().add(this);
        frame.setVisible(true);
        this.repaint();
public static void main(String[] args)
new MyGame();
}my image gets displayed.......but only single frame of a animated image....animation is not happening..........