How to dynamicly add a component to a panel

when I click a button, I want to add a component to a panel, how can I do ?
I try to do this:
public void actionPerformed(ActionEvent e)
contentPane.add(label,"north");
contentPane.repaint;
but there is no effect. Could u help me?

Could you tell me why the repaint method doesn't work?repaint() does some low level validation and its more often suits for refreshing JList,TextFields etc etc...
JPanel is somehow a more weighted component compared to JLabel,JTextFields etc,etc and hence it needs some heavy refreshing and these heavy refreshing can be obtained by doLayout() and validate() and some times both.
when I add a component into another component, how can I get the new performace of the updated component?Is there a universal way? Pls put ur question more clearly.

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Edited by: rahul_ram on Sep 30, 2009 10:59 PM
Edited by: rahul_ram on Sep 30, 2009 11:02 PM

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