How to add scroll bars to a panel

Hi
Can anyone plz tell me how to add a scroll bar to a panel created within a JFrame
Regards
ats

import javax.swing.*;
import java.awt.*;
class Testing extends JFrame
public Testing()
    setLocation(300,200);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    JPanel jp = new JPanel();
    jp.add(new JLabel("Label on a panel"));
    jp.setPreferredSize(new Dimension(200,300));
    JScrollPane sp = new JScrollPane(jp);
    sp.setPreferredSize(new Dimension(200,200));
    getContentPane().add(sp);
    pack();
public static void main(String args[]){new Testing().setVisible(true);}
}

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Click
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