Flickering Image update (only one Image drawn on Component), 10+ Duke Dolla

Question

I've made an RBGFilter for Images and Combined it with a Thread
to make an Image fade from Color to Grayscale.
I use it together with an home made JComponent. It works, but the Image flickers.
I've tried longer sleep periods (I thougt that maybe the filter was to slow) but it still flickered when changing the Image. I tried dubbel buffering, but couldn't get it to change the Image. Anyway, I suppose double buffering wouldn't help much, while it's only one Image to be drawn and it covers the entire Component.
Does anyone have a clue about how to do?? You'll get plenty of Duke Dollars!
(in the fade class)
public void run()
try{
while( !Thread.interrupted() ){
Thread.sleep( 70 );
//Change colors:
Image tmpImage = Toolkit.getDefaultToolkit().createImage(
new FilteredImageSource( colorImage.getSource(), fadeFilter ) );
ImageComponent.setImage( tmpImage ); //Home made component
//test if fading is finished...
catch( InterruptedException ie ){}
(in the home made component)
public void setImage( Image theImage )
this.theImage = theImage;
repaint();
public void paintComponent( Graphics g )
g.drawImage( theImage, 0, 0, this );
}

Answer 1

I dont know much about java but i do know a bit about MFC and this reminds me of a similiar issue in mfc. So heres my bet:
Calls to repaint do call directly to paintComponent they first execute some code that paints the background of the component then calls the paintComponent routine. Typically the background is white and this results in flickering.
Thats just a hunch. Because its similiar to an issue that you get in MFC around animation with framework paint calls.
You can play the hunch by calling paintComponent directly and see if your flickering goes away. If it does find a way to use repaint without it repainting the background before it calls paintComponent (im sure theres a way or a similiar framework routine)
One last thing? is the custom componet that your working with swing based? Cause swing based components are supposed to double buffer by default.