scale

    private BufferedImage scale(BufferedImage src, int w, int h) {
        int type = BufferedImage.TYPE_INT_RGB;  
        BufferedImage dst = new BufferedImage(w, h, type);
        Graphics2D g2 = dst.createGraphics();  
        // Fill background for scale to fit.  
        g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
                RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR);
        g2.setBackground(UIManager.getColor("Panel.background"));  
        g2.clearRect(0,0,w,h);  
        double xScale = (double)w/src.getWidth();  
        double yScale = (double)h/src.getHeight();  
        // Scaling options:  
        // Scale to fit - image just fits in label.  
        double scale = Math.min(xScale, yScale);  
        // Scale to fill - image just fills label.  
        //double scale = Math.max(xScale, yScale);  
        int width  = (int)(scale*src.getWidth());  
        int height = (int)(scale*src.getHeight());  
        int x = (w - width)/2;  
        int y = (h - height)/2;  
        g2.drawImage(src, x, y, width, height, null);  
        g2.dispose();
        g2.finalize();
        return dst;  
    }