JTable CellRenderer and NULL cells

Question

Hi,
I have a table where several cells have "nulls" in them. I want to set the backgound color of my cells. I use:
  myTable.setsetDefaultRenderer(Object.class, new MyCellRenderer());where MyCellRenderer extendsDefaultTableCellRenderer
This works fine for all cells except when a cell has a null value in it. Than the renderer is never called. Is there a solution?
Here is the code for MyCellRenderer:
class MyCellRenderer extends DefaultTableCellRenderer {
  public Component getTableCellRendererComponent
          (JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
    // Obtains default cell settings
    Component cell = super.getTableCellRendererComponent ( table, value,isSelected, hasFocus, row, column);
    if (row % 2 == 0)
      cell.setBackground(Color.blue);
    else
       cell.setBackground(Color.gray);
    if (column % 2 == 0) cell.setBackground(Color.green);
    return cell;
}Thanks
SUP

Answer 1

Register your renderer with the TableColumn or register the class related to your renderer with the TableColumn.
Basically, JTable retrieves its editors and renderer from a hashtable, and nulls cause a problem.
Consider some type of intelligent data wrapper that contains a null data value, but it itself is not null. Or maybe a null token class.
-jonathan