JScrollPane - Graphics - Headers

Question

Hi !
I am using a JPanel with a JScrollPane. I have define 2 JPanel to set the columnheader and the rowheader. I paint in this 3 panels with Graphics. My problem is the following :
When I use the scroll bar (moving up and then coming back) there is tracks of the principal Panel in the header...
I don't know if it is a conceptual or a programming problem....
Some one have ever had this problem ?
Thanks and excuse me for my bad english...

Answer 1

Try this sample:
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class PrinC extends JFrame 
public PrinC()
     addWindowListener(new WindowAdapter()
    {     public void windowClosing(WindowEvent ev)
          {     dispose();
               System.exit(0);}});
     JScrollPane jsp = new JScrollPane(new BPanel());
     jsp.setColumnHeaderView(new CPanel());
     jsp.setRowHeaderView(new RPanel());
     setContentPane(jsp);
       setBounds(1,1,700,500);
     setVisible(true);
public class BPanel extends JPanel
public BPanel()
     setBackground(Color.pink);
     setPreferredSize(new Dimension(1000,1000));
public void paintComponent(Graphics g)
     super.paintComponent(g);
     g.setColor(Color.black);
     g.drawRect(10,10,600,600);
public class CPanel extends JPanel
public CPanel()
     setBackground(Color.orange);
     setPreferredSize(new Dimension(1000,19));
public void paintComponent(Graphics g)
     super.paintComponent(g);
     g.setColor(Color.black);
     g.drawRect(3,3,getWidth()-7,getHeight()-7);
public class RPanel extends JPanel
public RPanel()
     setBackground(Color.green);
     setPreferredSize(new Dimension(19,1000));
public void paintComponent(Graphics g)
     super.paintComponent(g);
     g.setColor(Color.black);
     g.drawRect(3,3,getWidth()-7,getHeight()-7);
public static void main (String[] args) 
     new PrinC();
}Noah