Rotate a BufferedImage

RotateImage.java

    public BufferedImage rotateImage (BufferedImage img, int n) {
        int w = img.getWidth();
        int h = img.getHeight();

        BufferedImage bImg = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
        bImg.getGraphics().drawImage(img, 0, 0, null);

        int l = (int) Math.ceil(Math.sqrt(w * w * 1.0 + h * h));

        double rotationRequired = Math.toRadians (n);
        AffineTransform tx = new AffineTransform();
        tx.translate(l, l);
        tx.rotate(rotationRequired, 0, 0);
        AffineTransformOp op = new AffineTransformOp(tx, AffineTransformOp.TYPE_BILINEAR);

        BufferedImage newImage =new BufferedImage(l * 2, l * 2, bImg.getType());
        op.filter(bImg, newImage);

        return(newImage);
    }