public void removeAllTrackingIcons(){
  if (trackingIcons != null && trackingIcons.size() > 0) {
    trackingIcons.clear();
    repaint();
  }
}

public void removeAllTrackingIcons ( ) { if ( trackingIcons != null && trackingIcons . size ( ) > 0 ) { trackingIcons . clear ( ) ; repaint ( ) ; } }
removes all tracking icons .
