public void businessAccount()
    {


        int selection;

        System.out.println("nATM main menu:");
        System.out.println("1 - View account balance");
        System.out.println("2 - Withdraw funds");
        System.out.println("3 - Add funds");
        System.out.println("4 - Back to Account Menu");
        System.out.println("5 - Terminate transaction");
        System.out.print("Choice: ");
        selection = input.nextInt();

            if (selection > 5){

            System.out.println("Invalid choice.");
            businessAccount();

        }
            else if (selection < 1){
                System.out.println("Invalid choice.");
                businessAccount();
            }
            else {

        switch(selection)
        {
        case 1:
            viewAccountInfo3();
            break;
        case 2:
            withdraw3();
            break;
        case 3:
            addFunds3();
            break;
        case 4:
            AccountMain.selectAccount();
            break;
        case 5:
            System.out.println("Thank you for using this ATM!!! goodbye");
        }
            }
    }

try{
     selection = input.nextInt();
     switch(selection){
      case 1:
          viewAccountInfo3();
          break;
      case 2:
          withdraw3();
          break;
      case 3:
          addFunds3();
          break;
      case 4:
          AccountMain.selectAccount();
          break;
      case 5:
          System.out.println("Thank you for using this ATM!!! goodbye");
          break;
      default:
          System.out.println("Invalid choice.");
          businessAccount();

      }
}catch(InputMismatchException e){
    //do whatever you wanted to do in case input is not an int
}

InputStreamReader isr = new InputStreamReader(System.in);
BufferedReader br = new BufferedReader(isr);
String s = br.readLine();
int selection = 0;

try{
    selection = Integer.parseInt(s);
    if(selection > 5 || selection < 1){
        System.out.println("Invalid choice.");
        businessAccount();
    }else{
        // your switch code here
    }
    // you can use @Nishant's switch code here. it is obviously better: using switch's default case.
}catch(NumberFormatException ex){
    // throw new Exception("This is invalid input"); // or something like that..
    System.out.println("Invalid choice.");
    businessAccount();
}

if (selection > 5)||(selection < 1){
   System.out.println("Invalid choice.");
   businessAccount();
} else {
//....rest code
}