create-image

private void createImage(OutputStream out) {
	int width = 100;
	int height = 100;

	BufferedImage buffer = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);
	Graphics2D g = buffer.createGraphics();
	// set background:
	g.setBackground(Color.BLUE);
	g.clearRect(0, 0, width, height);
	// set fore color:
	g.setColor(Color.RED);
	// start draw:
	g.drawLine(0, 0, 99, 199);
	// end draw:
	g.dispose();
	buffer.flush();
		
	// encode:
	JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
	JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(buffer);
	param.setQuality(1.0f, false);
	encoder.setJPEGEncodeParam(param);
	try {
		encoder.encode(buffer);
	} catch (IOException ioe) {
		ioe.printStackTrace();
	}