BufferedImage Scaling

Hello all,
i am trying to wright a simple program where i have an image in a
file. I load it in to a BufferedImage and scale it, and then i want to
be able to set the position from the source code.

it works like this. i have 2 BufferedImages i load an image in to them
in the constructor. in the paint method i want to scale img and save
the scaled img to offimg, and the set the position of offimg and draw
it.

here is the source:

BufferedImage img = null; // colored Square
BufferedImage offimg = null; // black Square

    Test1Cont(){
        try {
            img = ImageIO.read(new File("wSquare.bmp"));
            offimg = ImageIO.read(new File("bSquare.bmp"));
        } catch (IOException e) {}
    }

    public void paint(Graphics g) {
        Graphics2D g2d = (Graphics2D) g;
        g2d.fillRect(0, 0, getWidth(), getHeight());
        AffineTransform tx = new AffineTransform();
        tx.scale(5, 5);

        offimg.createGraphics().drawImage(img, tx, null);
        g2d.drawImage(offimg,x,y,null); //set the size with x and y
    }

thanks all