cellRenderer = cr; firePropertyChange(CELL_RENDERER_PROPERTY_CHANGED, old, cr);
cellRenderer = renderer; firePropertyChange(CELL_RENDERER_PROPERTY_CHANGED, old, renderer);
  public void setCellRenderer(ListCellRenderer cr)  {    ListCellRenderer old = cellRenderer;    cellRenderer = cr;    firePropertyChange(CELL_RENDERER_PROPERTY_CHANGED, old, cr);    revalidate();    repaint();  }