JPanel image rotating function

[anoorally]

In a generic class i created the following function:

        public static void createPicture(JFrame f) throws Exception {
    	    final BufferedImage bi = ImageIO.read(new File("picture.png"));
    	    JPanel newPanel = new JPanel() {

                @Override
                public Dimension getPreferredSize() {
                    return new Dimension(bi.getWidth(), bi.getHeight());
                }

                @Override
                protected void paintComponent(Graphics g) {
                    super.paintComponent(g);
                    Graphics2D g2 = (Graphics2D) g;
                    g2.rotate(Math.toRadians(90), bi.getWidth() / 2, bi.getHeight() / 2);
                    //g2.rotate(Math.toRadians(0),bi.getWidth(), bi.getHeight()-bi.getWidth());
                    g2.drawImage(bi, 0, 0, null);
                }
            };
    	f.add(newPanel);
        f.setSize(f.getPreferredSize().height, f.getPreferredSize().width);
        f.repaint();
    }

and then called the function in another class called GUI which has a the actual user interface through the following code, at the click of a jbutton:

PictureRotation.createPicture(this);

Nothing is displayed on the JFrame, anything wrong with the codes?

[Fubarable]

For one, your center of rotation will be off if the image has any eccentricity (if it's not close to being a square).