How to set the color of ticks in JSlider

Question

Hi,
Question about JSlider.
I am trying to set various colors between the ticks. However, I have gone thro' the javadoc of JSlider but find no such API.
How could I go this?
Thanks in advance for any inputs and ideas.
Wing

Answer 1

Here is quick demo about customize thumb.
It is similar for customize other part of JSlider.
You can use setUI to force use your own UI.
Create your UI, the better way is extend from existing UI,
for example: BasicSliderUI or MetalSliderUI (or... depend on L&F you want).
Check the BasicSliderUI and MetalSliderUI API
customize the paintXXXX method, that's it.
Good Luck.
import javax.swing.*;
import java.awt.*;
import javax.swing.plaf.metal.MetalSliderUI;
public class Test {
  public static void main(String[] args) {
    JFrame f = new JFrame();
    JSlider slider = new JSlider();
    slider.setPaintTicks(false);
    slider.setUI ( new MetalSliderUI() {
      public void paintThumb(Graphics g)  {
          Rectangle knobBounds = thumbRect;
          Color color = g.getColor();
          g.setColor(Color.red);
          g.fillOval(knobBounds.x, knobBounds.y, 15,15);
          g.setColor(color);
    f.getContentPane().add (slider);
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.pack();
    f.setVisible(true);
}