Slider.verticalThumIcon ? How to set a custom icon for JSlider

Question

Hi Guys,
Can anyone please tell me where I am going wrong in the code below.
I am trying to change the thum icon for JSlider to a custom one, but for some reason the new thum icon is not getting displayed.....
UIDefaults defaults = UIManager.getDefaults();
defaults.put("Slider.verticalThumbIcon", new ImageIcon(Slider.class.getResource("./cursor.jpg")));
defaults.put("Slider.background", Color.BLUE);
final JSlider slider = new JSlider();
slider.setPreferredSize(new Dimension(250,20));
getContentPane().add(slider, BorderLayout.NORTH);
I can see the blue background, BUT I still see the default thumb icon.
I also tried using
defaults.put("Slider.verticalThumbIcon", new ImageIcon("./cursor.jpg"));
Thanks a ton...

Answer 1

this works OK
import java.awt.*;
import javax.swing.*;
import javax.swing.plaf.basic.BasicSliderUI;
import java.net.URL;
import javax.imageio.ImageIO;
class Testing extends JFrame
  public Testing()
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    setLocation(200,100);
    JSlider slider = new JSlider(0,100,0);
    slider.setUI(new MyBasicSliderUI(slider));
    slider.setMajorTickSpacing(10);
    slider.setMinorTickSpacing(5);
    slider.setPaintTicks(true);
    slider.setPaintLabels(true);
    JPanel jp = new JPanel();
    jp.add(slider);
    getContentPane().add(slider);
    pack();
  class MyBasicSliderUI extends BasicSliderUI
    Image im;
    public MyBasicSliderUI(JSlider js)
      super(js);
    public void paintThumb(Graphics g)
      try
        URL url = new URL(getClass().getResource("Save.gif"), "Save.gif");
        im = ImageIO.read(url);
      catch(Exception e){e.printStackTrace();}
      Rectangle thumb = thumbRect;
      g.drawImage(im,thumb.x,thumb.y,null);
  public static void main(String[] args){new Testing().setVisible(true);}
}