public void addAnnotation(final Annotation annotation){
  annotationList.add(annotation);
  annotation.setxyGraph(xyGraph);
  add(annotation);
  revalidate();
  changeSupport.firePropertyChange("annotationList",null,annotation);
}

public void addAnnotation ( final Annotation annotation ) { annotationList . add ( annotation ) ; annotation . setxyGraph ( xyGraph ) ; add ( annotation ) ; revalidate ( ) ; changeSupport . firePropertyChange ( "annotationList" , null , annotation ) ; }
add an annotation to the plot area .
