How to stop flickering in this code

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

/*
<applet height=800 width=600 code="RaceApplet.java"></applet>
*/

public class RaceApplet extends JApplet implements KeyListener
{
    private Image player;
    private Image bg;
    private int nx = 800;
    private int ny = 0;
    private Rectangle rect;

    private void loadPicture()
    {
        bg = new ImageIcon("RaceBack.png").getImage();
        player = new ImageIcon("KD//KDE.png").getImage();
    }

    public void init()
    {
        loadPicture();
        rect = new Rectangle(250, 93, 50, 50);
        this.addKeyListener(this);
    }

    public void paint(Graphics g)
    {
        super.paint(g);
        g.setColor(Color.green);
        g.fillRect(0, 0, 34567, 34567);
        g.drawImage(bg, nx - 800, ny, null);
        g.drawImage(player, rect.x, rect.y, null);

    }

    public void keyPressed(KeyEvent e)
    {
        if( e.getKeyCode() == KeyEvent.VK_RIGHT )
        {
            nx = nx - 20;
            player = new ImageIcon("KD//KDE.png").getImage();
        }
        if( e.getKeyCode() == KeyEvent.VK_LEFT )
        {
            nx = nx + 20;
            player = new ImageIcon("KD//KDW.png").getImage();
        }
        if( e.getKeyCode() == KeyEvent.VK_UP )
        {
            ny = ny + 20;
            player = new ImageIcon("KD//KDN.png").getImage();
        }
        if( e.getKeyCode() == KeyEvent.VK_DOWN )
        {
            ny = ny - 20;
            player = new ImageIcon("KD//KDS.png").getImage();
        }

        repaint();
    }

    public void keyReleased(KeyEvent e)
    {

    }

    public void keyTyped(KeyEvent e)
    {

    }

}

The problem is when I move my car on the applet screen it flickers. Is there any solution to this. How can I make it Flicker free screen. I have searched on most of the sites but the way they showed it didn't worked that much

thnx for help in advance

You should load all your images at the begining instead of instantiating them every time you need them.