Duvida cellrender e celleditor

modelo = new DefaultTableModel( dado , colu );   
	    jTable1 = new JTable( modelo );  // linha e coluna
  	    jTable1.setVisible(true);
	    jTable1.getTableHeader().setReorderingAllowed(false);
	    jTable1.getTableHeader().setResizingAllowed(false);
	    jTable1.getTableHeader().setBackground( Color.lightGray ) ;
	    jTable1.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
	    jTable1.setGridColor( Color.black );
	    jTable1.setShowHorizontalLines(true) ;
	    jTable1.setShowVerticalLines(true) ;
	    jTable1.setEnabled(true);
	    jTable1.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
	    jTable1.getColumnModel().getColumn(0).setPreferredWidth( 100 );
	    jTable1.getColumnModel().getColumn(1).setCellEditor(new MoedaCellEditor());
	    jTable1.getColumnModel().getColumn(1).setCellRenderer(new MoedaCellRender());
	    modelo.setRowCount(10);

public class MoedaCellRender extends JLabel implements TableCellRenderer {

	/**
	 * classe para mostrar a celula com formato de moeda
	 */
	private static final long serialVersionUID = 1L;
	private JLabel cell = null;
	private NumberFormat formatter = NumberFormat.getCurrencyInstance( new Locale("pt","BR") ); // Locale.getDefault()
	
	private JLabel getCell() {
		if (cell == null)
			cell = new JLabel();
		return cell;
	}

	public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
		if (value != null) {
			getCell().setText( formatter.format(value) );
			getCell().setHorizontalAlignment(SwingConstants.RIGHT);
		} else getCell().setText("");
		return getCell();
	}
}

public class MoedaCellEditor extends AbstractCellEditor implements TableCellEditor {
	
	/**
	 * classe para editar a celula com formato de moeda
	 */
	private static final long serialVersionUID = 1L;
	private JFormattedTextField moeda = null;
	private NumberFormat formatter = NumberFormat.getCurrencyInstance(new Locale("pt","BR"));
	
	private JFormattedTextField getCell() {
		if (moeda == null)
			moeda = new JFormattedTextField(formatter);
		return moeda;
	}

	public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
		getCell().setValue(value);
		return getCell();
	}

	public Object getCellEditorValue() {
		return getCell().getValue();
	}

}