revalidate(); repaint();
  public void setSelectionModel(ListSelectionModel l)  {    ListSelectionModel old = selectionModel;    if (old != null)      old.removeListSelectionListener(listListener);    selectionModel = l;    if (selectionModel != null)      selectionModel.addListSelectionListener(listListener);    firePropertyChange(SELECTION_MODEL_PROPERTY_CHANGED, old, l);  }