disabeldIcon = new ImageIcon(grayImage);
disabledIcon = new ImageIcon(grayImage);
  public Icon getDisabledIcon()  {    if (disabeldIcon == null && default_icon instanceof ImageIcon)      {        Image iconImage = ((ImageIcon) default_icon).getImage();        Image grayImage = GrayFilter.createDisabledImage(iconImage);        disabeldIcon = new ImageIcon(grayImage);      }          return disabeldIcon;  }