java中窗体上的图片.和进度条的问题

[qiankun19851231]

public void paint(Graphics g) {
super.paint(g);
Image img = Toolkit.getDefaultToolkit().getImage("image/splash.jpg");
g.drawImage(img, 0, 0, null, this);
this.getContentPane().setLayout(null);
jProgressBar1.setBounds(new Rectangle(18, 80, 269, 29));
this.getContentPane().add(jProgressBar1);

}

当显示时图片会把进度条盖掉.请问应该怎么样让进度条放在图片上呢?