public Object getValueAt(int row, int col) {
   Dvd theDvd = data.get(row);
   Object theData = null;
   switch (col) {
     case 0:
       theData = theDvd.getTitle();
       break;
     case 1:
       theData = theDvd.getCategory();
       break;
     case 2:
       theData = theDvd.getRunningTime();
       break;
     case 3:
       theData = theDvd.getYearReleased();
       break;
     case 4:
       theData = theDvd.getPrice();
       break;
     default:
       break;
   }
   return theData;
 }