Having trouble with scrolling my JPanel

hello there,
I'm building a simple GUI that consists of a JPanel containing JLabel objects that are added dynamically, during the execution of the program. I want the panel to be scrollable (if needed) and that's the instruction I've written for it :
public class GUI extends JPanel
JPanel jpanel = new JPanel( );
JScrollPane sp = new JScrollPane( );
sp.setViewportView( jpanel );
add( sp , BorderLayout.CENTER );
This code isn't complicated and should not be... so why isn't my panel scrollable when I'm adding JLabels to it???
regars
Peter

You have to explicitly set the size of the panel. You are adding the labels on Panel but set the PreferredSize and SetSize explicitly.
Cheers

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