ScrollBars not showing up properly

Question

I am displaying a JTree in a JScrollPane with default settings ie. both horizontal and vertical scroll bars will show up when the contents can not fit in to the scroll pane.In this case when i expand the tree nodes the scroll bars are not showing up properly.It looks like the foreground is not painted properly.The background color is white here.We are using custom look and feel, not the standard one. Any idea why it is so?
Thanx in advance
Ashok

Answer 1

This is the MetalTheme i am using.
public class SSBCMetalTheme extends javax.swing.plaf.metal.MetalTheme
//     private final ColorUIResource primary1 = new ColorUIResource(102,102,153);
     private final ColorUIResource primary1 = new ColorUIResource(0,0,0);
//     private final ColorUIResource primary2 = new ColorUIResource(153,153,204);
     private final ColorUIResource primary2 = new ColorUIResource(153,153,153);
//     private final ColorUIResource primary3 = new ColorUIResource(204,204,255);
     private final ColorUIResource primary3 = new ColorUIResource(204,204,204);
private final ColorUIResource windowBackground = new ColorUIResource(Color.white);
private final ColorUIResource textHighlight = new ColorUIResource(Color.blue);
     private final ColorUIResource secondary1 = new ColorUIResource(102,102,102);
     private final ColorUIResource secondary2 = new ColorUIResource(153,153,153);
     private final ColorUIResource secondary3 = new ColorUIResource(204,204,204);
//     private FontUIResource controlFont = new FontUIResource("Dialog",Font.BOLD,12);
     private FontUIResource controlFont = new FontUIResource("Dialog",Font.BOLD,11);
//     private FontUIResource systemFont = new FontUIResource("Dialog",Font.PLAIN,12);
     private FontUIResource systemFont = new FontUIResource("Dialog",Font.PLAIN,11);
//     private FontUIResource userFont = new FontUIResource("Dialog",Font.PLAIN,12);
     private FontUIResource userFont = new FontUIResource("Dialog",Font.PLAIN,11);
     private FontUIResource smallFont = new FontUIResource("Dialog",Font.PLAIN,10);
     public String getName() { return "SSBC"; }
     protected ColorUIResource getPrimary1() { return primary1; }
     protected ColorUIResource getPrimary2() { return primary2; }
     protected ColorUIResource getPrimary3() { return primary3; }
     protected ColorUIResource getSecondary1() { return secondary1; }
     protected ColorUIResource getSecondary2() { return secondary2; }
     protected ColorUIResource getSecondary3() { return secondary3; }
     //public ColorUIResource getWindowBackground() { return (primary3); };
     public ColorUIResource getWindowBackground() { return windowBackground; };
     public ColorUIResource getDesktopColor() { return (primary3); };
     public ColorUIResource getTextHighlightColor(){ return primary3;}
//public ColorUIResource getControlDisabled(){ return primary3;}
//public ColorUIResource getControlHighlight(){ return windowBackground;}
     public FontUIResource getControlTextFont() { return controlFont;}
     public FontUIResource getSystemTextFont() { return systemFont;}
     public FontUIResource getUserTextFont() { return userFont;}
     public FontUIResource getMenuTextFont() { return controlFont;}
     public FontUIResource getWindowTitleFont() { return controlFont;}
     public FontUIResource getSubTextFont() { return smallFont;}
I can't use windows look and feel as i am using the above look and feel.Any idea what is the problem?
Thanx
Ashok