Bonjour
Va voir :
http://www.self-access.com/java/jvImage2.htm
ou essai ca :
public BufferedImage createComposite(BufferedImage im1, BufferedImage im2, float alpha) {
BufferedImage buffer = new BufferedImage(Math.max(im1.getWidth(), im2.getWidth()),
Math.max(im1.getHeight(), im2.getHeight()),BufferedImage.TYPE_INT_ARGB);
Graphics2D g2=buffer.createGraphics();
g2.drawImage(im1, null, null);
Composite newComposite = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha);
g2.setComposite(newComposite);
g2.drawImage(im2, null, null);
g2.dispose();
return buffer;
}
bye