// paint to the buffered image
BufferedImage bufimg = new BufferedImage(comp.getWidth(),comp.getHeight(),
BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = bufimg.createGraphics();
// restore the foreground color in case the super class needs it
g2.setColor(g.getColor());
super.paint(g2,comp);
// do an alpha composite
Graphics2D gx = (Graphics2D) g;
gx.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER,0.8f));
gx.drawImage(bufimg,0,0,null);
