@Override
      public Component getTableCellRendererComponent(JTable table, Object value, boolean selected, boolean focus, int row, int column) {
        super.getTableCellRendererComponent(table, value, selected, focus, row, column);
        setText("");
        return this;
      }
@Override
      public Component getTableCellRendererComponent(JTable table, Object value, boolean selected, boolean focus, int row, int column)