var bufferedImage = Java.type("java.awt.image.BufferedImage");
function start(source,dest){
bufferedImage = javax.imageio.ImageIO.read(source);
var newBufferedImage = new java.awt.image.BufferedImage(bufferedImage.getWidth(),
bufferedImage.getHeight(), java.awt.image.BufferedImage.TYPE_INT_RGB);
// Color.WHITE is the background colour of the jpg image no transparency in jpg
newBufferedImage.createGraphics().drawImage(bufferedImage, 0, 0, java.awt.Color.WHITE, null);
javax.imageio.ImageIO.write(newBufferedImage, "jpg", new java.io.File(dest));
}