A_in.java

public class A {
  public Object getColumnDataCell(int col)
  {
    Object obj = "";
    switch (col)
    {
      case 0 :
        obj = getId();
        break;
       case 1 :
         obj = getDistrict();
         break;
        case 2 :
          obj = getPack();
          break;
         case 3 :
           obj = getDen();
           break;
          case 4 :
            obj = getLastName();
            break;
           case 5 :
             obj = getFirstName();
             break;
            case 6 :
              obj = getVehicleNumber();
              break;
             default :
               break;
    }
    return obj;
  }
}