JLabel ImageIcon not opaque.

Question

Hi I am having a little problem with my program that I am trying to develop.
I have created a JFrame and instead of having the background the usual grey I have used an image.
I then wanted to create some nice big buttons with nice smooth curved edges but was having trouble using the JButton so decicded to use a JLabel and attach a MouseListener to it. This seems to be working fine at the mo.
The only problem is that instead of my nice gradient filled background being displayed I get a big white border around the JLabel. The rest of the background is perfectly displayed having only a problem around the JLabel. I have tried not using a background image and it shows the JLabel correctly and the button looks nice and smooth.
I think it might be something to do with the rendering sequence maybe but I am at a loss. If any one has any ideas on how to fix it or a better way of doing it I would be most grateful.
Many thanks for your help in advance.
Matt
PS now heres my code:
public class GUI extends JFrame implements MouseListener {
     ImageIcon icon;
     JPanel buttonPanel = new JPanel();
     public GUI(){
          super("Property Works - Estate Agent Management System");
          icon = new ImageIcon("images/bg.jpg");
          JPanel panel = new JPanel(){
               protected void paintComponent(Graphics g){
                    //g.drawImage(icon.getImage(), 0, 0, null);
                    Dimension d = getSize();
                    //g.drawImage(icon.getImage(), 0, 0, d.width, d.height, null);                    
                    super.paintComponent(g);                    
          panel.setOpaque(false);
          addButton();
          panel.add(buttonPanel);
          getContentPane().add(panel);
          setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          setExtendedState(JFrame.MAXIMIZED_BOTH);
          setVisible(true);
     public void addButton(){
          ImageIcon icon1 = new ImageIcon("images/buttons/addProperty.gif");
          JLabel addProperty = new JLabel(icon1);
          addProperty.setOpaque(false);
          addProperty.setToolTipText("Add a new property");
          addProperty.addMouseListener(this);
          JLabel tester = new JLabel("Tester");
          tester.setOpaque(false);
          buttonPanel.add(addProperty);
          buttonPanel.add(tester);     
     public void mousePressed(MouseEvent arg0) {
          // TODO Auto-generated method stub
          System.out.println("Button Clicked");
}

Answer 1

Swing related questions should be posted in the Swing forum.
Use the "code" tags when you post code so the formatting is retained.
The code you posted doesn't compile so we can't see the incorrect behaviour.
Using code I already have I do not see any white border around the image. I tested using a "Duke" image which is found in many of the Swing tutorial examples. Maybe your image is the problem.