Java Swing problem?

Hi

i have a simple code that make you choose an image and display its thumbnail to you

Code Java:

---

 //GUI
        final JFrame ff=new JFrame();
 
        final JButton b1=new JButton("Choose file");
        final JLabel l1=new JLabel("Choosen file: ");
 
 
 
 
 
 
 
        ff.setVisible(true);
        ff.setSize(700, 500);
        ff.getContentPane().setLayout(null);
 
 
 
 
        b1.setBounds(300, 20, 100, 30);
        l1.setBounds(300, 60, 80, 30);
        ff.getContentPane().add(b1);
        ff.getContentPane().add(l1);
 
 
 
 
 
 
 
 
 
        b1.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e)
			{
			try{
 
                        JFileChooser chooser = new JFileChooser();
                        int returnVal = chooser.showOpenDialog(null);
                        if(returnVal == JFileChooser.APPROVE_OPTION)
                        {
                            //Convert the data into an image
 
                           Image i=ImageIO.read(new File((chooser.getSelectedFile().getPath())));
                           i=i.getScaledInstance(100, 100,i.SCALE_DEFAULT);
                           JLabel img= new JLabel(new ImageIcon(i));
                           img.setBounds(320, 90, 100, 100);
                           ff.getContentPane().add(img);
 
 
 
                        }
                        }catch(IOException IO){System.out.print("File not found");}
                        }});

---

it works fine except when the image shows it doesn't show unless i re-size the size of the frame..
it got nothing to do with the original size of the frame because i tried bigger frames.
what i noticed is that if i add a component to the frame inside an action listener this happens.

thx
Nasser

Short version:
repaint yo.

Long version:
"To enable app-triggered painting, the AWT provides the following java.awt.Component methods to allow programs to asynchronously request a paint operation:

public void repaint()
public void repaint(long tm)
public void repaint(int x, int y, int width, int height)
public void repaint(long tm, int x, int y,
int width, int height)
"

Painting in AWT and Swing

thanks a lot!!!
it worked