UIColorChooserPanelExample.java

someComponent.addPropertyChangeListener(new PropertyChangeListener() {  
   public void propertyChange(PropertyChangeEvent evt) {
    if (evt.getPropertyName().equals("color") && evt.getNewValue() instanceof Color) {
     Color color = (Color) evt.getNewValue();
     someComponent.setColor(color);
     someComponent.repaint();
    }  
   }
  });