HOWTO: JLayeredPane with a scrollable image background

Hi,all
I want to construct a JLayeredPane with a scrollable image background,
so I do the following,but the result is: the Image displayed,but without scroll bars,but when I expand the window,the vertical scrollbar appeared,why?
I am confusing...who can help me ?
class ImagePanel extends Jpanel {
public void paintComponent(Graphics g) {
//paint the icon here
class ImageScroller extends JScrollPane {
public ImageScroller() {
ImagePanel panel = new ImagePanel();
getViewport().add(panel);
//set horizontal and vertical scrollbar's value to the icon's value
class MapPanel extends JLayeredPane {
public MapPanel() {
setLayout(new BorderLayout());
ImageScroller is = new ImageScroller();
setLayer(is,0,0);
add(is,BorderLayout.center);
}

Hi,
I too am confused as to why you've used getViewport().add instead of setViewportView(). with that i had no problems. try that. i'm not sure if it'll solve the problem though.
Regards,
Phani Kanuri

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HOWTO: JLayeredPane with a scrollable image background

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