private String withdrawSavings(Scanner in) throws FileNotFoundException
   {
      System.out.println("Current balance: " + 
      supportedBank.getSavingsBalance(currentCustomer));
      boolean successWithdraw = false;
      while(!successWithdraw)
      {
         System.out.println(
                "Please enter an ammount you like to withdraw: ");
         double withdrawAmount = in.nextDouble();
         if(withdrawAmount > withdrawLimit || withdrawAmount > transactionLimit
               || withdrawAmount < minimumCash)
         {
            System.out.println("Please enter an ammount smaller than "
                  + withdrawLimit + " or greater than " + minimumCash);
         }
         else if(withdrawAmount > cashOnATM || cashOnATM == 0)
         {
             System.out.println("Sorry, the ATM only has " + cashOnATM);
         }
         else if(withdrawAmount > 
                  supportedBank.getSavingsBalance(currentCustomer))
         {
             System.out.println("Isufficient funds, please try a different"
                           + " a different ammount.");
         }
         else
         {
             supportedBank.withdrawSavings(withdrawAmount, currentCustomer);
             System.out.println("Transaction successful, "
                   + "your account balance is: $"
                   + supportedBank.getSavingsBalance(currentCustomer));
             
             successWithdraw = true;
         }          
      }
      return "quit";      
      
   }