Problem changing scroll bar color using UIManager

Question

I am using the following code to change the color of a JScrollBar just before instantiating a JScrollPane:
[ code ]
//set colors
UIManager.put("ScrollBar.thumbLightShadow", ltGrn );
UIManager.put("ScrollBar.thumb", grn );
UIManager.put("ToolBar.thumb", ltGrn );
UIManager.put("ScrollBar.thumbDarkShadow", darkGrn );
UIManager.put("ScrollBar.thumbShadow", darkGrn );
UIManager.put("ScrollBar.thumbHighlight", ltGrn );
//instantiate
JScrollPane scrollPane = new JScrollPane( table );
//reset UIManager
UIManager.put("ScrollBar.thumbLightShadow", null );
UIManager.put("ScrollBar.thumb",null );
UIManager.put("ToolBar.thumb", null );
UIManager.put("ScrollBar.thumbDarkShadow", null );
UIManager.put("ScrollBar.thumbShadow", null );
UIManager.put("ScrollBar.thumbHighlight", null );
[ /code ]
where ltGrn, darkGrn, and grn are various shades of green.
Everything works fine, UNTIL I open another JFrame that is part of the same program. After doing this, the original scroll bar above is still green, EXCEPT the border of it has changed to Metal Theme puple from green. In addition, if that second JFrame has any JScrollBars of it's own, they are Metal Theme purple with a green border! It seems to be a bug since only one part of the JScrollBar changes. If anyone has any suggestions on this I thank you in advance.
AC

Answer 1

When I execute the following I see identical modified scrollbars on the two frames that are created within this little app. I am relatively new to Java, so the design might not be great here, but the code will compile and run as is. You can use this to see if you still see the effect you have described. I am using version 1.4.1_03 on Red Hat Linux 8.0.
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.plaf.*;
public class Frame extends JFrame implements ActionListener
     JButton btnOne = new JButton("First Frame");
     JButton btnTwo = new JButton("Second Frame");
     public static void main(String[] args)
          Frame f = new Frame();
          f.setSize(300, 300);
          f.show();
     public Frame()
          setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          redesignScroll();
          // This method resets the default colors for the scrollbars..
          btnOne.addActionListener(this);
          btnTwo.addActionListener(this);
          Container contentPane = getContentPane();
          contentPane.setLayout(new GridLayout(2, 1, 5, 5));
          contentPane.add(btnOne);
          contentPane.add(btnTwo);          
     public void actionPerformed(ActionEvent e)
          if (e.getSource() == btnOne)
               new FirstPopUp();
          else new SecondPopUp();
     private void redesignScroll()
          final Color cBkd = new Color(97, 115, 87);
          UIDefaults defaults = UIManager.getDefaults();
          defaults.put("ScrollBar.thumbHighlight",
                    new ColorUIResource(Color.darkGray));
          defaults.put("ScrollBar.thumbShadow",
                    new ColorUIResource(Color.black));
          defaults.put("ScrollBar.shadow",
                    new ColorUIResource(Color.black));
          defaults.put("ScrollBar.background",
                    new ColorUIResource(cBkd));
          defaults.put("ScrollBar.darkShadow",
                    new ColorUIResource(Color.black));
          defaults.put("ScrollBar.thumb",
                    new ColorUIResource(cBkd));
          defaults.put("ScrollBar.highlight",
                    new ColorUIResource(Color.black));     
     private class FirstPopUp extends JFrame
          private JScrollPane sp;
          private String text = "Hello World!  First Pop Up!\n ";
          private JTextArea area;
          FirstPopUp()
               area = new JTextArea();
               int i = 0;
               while (i < 20)
                    area.append(text);
                    i++;
               sp = new JScrollPane(area);
               getContentPane().add(sp);
               setSize(200, 200);
               show();
     private class SecondPopUp extends JFrame
          private JScrollPane sp;
          private String text = "Hello World!  Second Pop Up!\n ";
          private JTextArea area;
          SecondPopUp()
               area = new JTextArea();
               int i = 0;
               while (i < 20)
                    area.append(text);
                    i++;
               sp = new JScrollPane(area);
               getContentPane().add(sp);
               setSize(200, 200);
               show();
}