I am trying to develop a Image Sliding application but unfortunately its not working... Can any one help me in this

Can Anyone Help Me In This

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

class SlideShow extends JFrame implements ActionListener { int img=1; JPanel jp1,jp2; JButton jb1,jb2;

SlideShow()
{
    setVisible(true);
    setSize(650,650);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setLocationRelativeTo(null);

    Container con=this.getContentPane();

    jp1=new JPanel();
    jp1.setLayout(new FlowLayout());

    jb1=new JButton(">>");
    jb1.setToolTipText("Next");
    jb1.addActionListener(this);
    jp1.add(jb1);

    jb2=new JButton("<<");
    jb2.setToolTipText("Previous");
    jb2.addActionListener(this);
    jp1.add(jb2);

    jp2=new JPanel();
    jp2.setLayout(new FlowLayout());

    con.add(jp1,BorderLayout.SOUTH);
    con.add(jp2,BorderLayout.NORTH);
}


public void actionPerformed(ActionEvent ae)
{
    if (ae.getSource()==jb1)
    {
        img++;
        repaint();          
        if (img>4)
        {
            img=1;
        }
    }
    else if (ae.getSource()==jb2)
    {
        img--;
        repaint();
        if (img<1)
        {
            img=4;
        }
    }
}


public void paint(Graphics g)
{
    Color myColor = new Color(150,250,150);

    ImageIcon im=new ImageIcon(img+".jpg");
    JLabel l=new JLabel(im);

    //l.setOpaque(true);
    l.setBackground(myColor);

    jp2.add(l,BorderLayout.CENTER);

    jp2.validate();
    jp2.repaint();
}

public static void main(String[] args) 
{
    new SlideShow();
}

}