Draw a JPanel in a Image

Question

Hi,
I'd like to draw what is in my JPanel into a image to export it. But When I try to do that , I have problems. I put my code to be more clear:
// comp is the JPanel
comp.setDoubleBuffered(false);
JFrame frame = new JFrame();
frame.setContentPane(comp);
frame.pack();
Dimension size = comp.getSize();
Image image = comp.createImage(size.width,size.height);
final Graphics g = image.getGraphics();
g.setClip(0,0,size.width,size.height);
try
// Paint the Swing component into the image
SwingUtilities.invokeAndWait(new Runnable()
public void run()
comp.paint(g);
catch (Exception x) { x.printStackTrace(); }
finally
g.dispose();
frame.dispose();
The problem is that I export into GIF this image, but if I don't show the frame:
frame.show(); at least one time, the image is bad: it has a black background. I tried to set the background, but nothing works execpt showing the frame.
If you could help me, I would be great.
Vincent

Answer 1

to diesel22
http://onesearch.sun.com/search/developers/index.jsp?col=devforums&qp=&qt=%2Bprint+%2Bshow