Swing/VolumeSlider のバックアップ(No.16)

class TriangleSliderUI extends javax.swing.plaf.metal.MetalSliderUI {
  @Override public void paintThumb(Graphics g) {
    Graphics2D g2 = (Graphics2D)g;
    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    g2.fillOval(thumbRect.x,thumbRect.y,thumbRect.width,thumbRect.height);
  }
  @Override public void paintTrack(Graphics g) {
    int cx, cy, cw, ch;
    int pad;
    Rectangle trackBounds = trackRect;
    if(slider.getOrientation() == JSlider.HORIZONTAL ) {
      Graphics2D g2 = (Graphics2D)g;

//......

slider2.setUI(new javax.swing.plaf.metal.MetalSliderUI() {
  @Override protected void paintHorizontalLabel(Graphics g, int v, Component l) {
    JLabel lbl = (JLabel)l;
    lbl.setForeground(Color.GREEN);
    super.paintHorizontalLabel(g,v,lbl);
  }
});
slider2.setForeground(Color.BLUE);