Capturing heavyweight java components?

robot.createScreenCapture(new Rectangle(Toolkit.getDefaultToolkit().getScreenSize()));

Point p = yourAwtComponent.getLocationOnScreen();
int w   = yourAwtComponent.getWidth();
int h   = yourAwtComponent.getHeight();

Rectangle rectangle = new Rectangle( p.x, p.y, w, h );

Image image = robot.createScreenCapture(rectangle);

ImageIO.write( image, "png", file );

int width = frameContainer.getWidth();
    int height = frameContainer.getHeight();

    BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
    Graphics2D g2 = image.createGraphics();

    frameContainer.paint(g2);

    return image;