protected JComponent createContent(){
  JLabel lb=new JLabel("");
  lb.setForeground(new Color(230,230,230));
  return lb;
}

protected JComponent createContent ( ) { JLabel lb = new JLabel ( "" ) ; lb . setForeground ( new Color ( 230 , 230 , 230 ) ) ; return lb ; }
subclass may be override to implement itself logic .
