out = new DataOutputStream(s.getOutputStream());
zipout = new GZIPOutputStream(out);
while(true)
{
img = conn.getScreenImg(new Rectangle(Toolkit.getDefaultToolkit().getScreenSize()));
//Here conn is a Object of Robot Class
ImageIO.write(img, "jpeg", zipout);
Thread.sleep(200);
System.out.println("Success");
}

while(true)
{
try
{
img = ImageIO.read(zipin);
Graphics g = this.getGraphics();
g.drawImage(img, 0, 0, this);
Thread.sleep(100);
}
catch (Exception e)
{
e.printStackTrace();
}
}

class ImagePanel extends JPanel {

    private BufferedImage image = null;

    private void setImage(BufferedImage img) {
      image = img;
      repaint();
    }

    public void paintComponent(Graphics g) {
      super.paintComponent(g);
      Graphics2D g2 = (Graphics2D) g;
      if (image != null) {
        g2.drawImage(image, 0, 0, null);
      }
    }
  }