class MojRenderer1
      extends DefaultTableCellRenderer
      implements TableCellRenderer
  {

    public Component getTableCellRendererComponent
        (JTable table, Object value, boolean selected, boolean
         focused, int row, int column)
    {

      Component cell = super.getTableCellRendererComponent
          (table, value, selected, focused, row, column);

      cell.setBackground(Color.red);
      // You can also customize the Font and Foreground this way
      // cell.setForeground();
      // cell.setFont();
      return cell;
    }
  }

...

MojRenderer1 tcr = new MojRenderer1();
TableColumn col = jTable1.getColumnModel().getColumn(1);
col.setCellRenderer(tcr);
jTable1.repaint();

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i can change column background. i don't know how to change row background.