Java input validation. Does anyone know why that doesn't work?

Question

Im on to validate all the inputs. When I run the program it only accepts if there is a "ms" or "Ms" or "Mr" or "mr" what is good. but when I enter "Mr" he sets the last word which I wrote wrong and set it as -title-. Then he skips the First Name input because he set already the right written "Mr" on it. The program works without validation. Why does it not accept the first "Mr" as title?

System.out.println("\nTitle of the student (eg, Mr, Ms): ");
while (!keyboard.hasNext("Mr") && !keyboard.hasNext("Ms") && !keyboard.hasNext("mr") && !keyboard.hasNext("ms")) {
                    {
                        System.out.println("Attention! Title must be Mr or Ms please choose one.");
                       list[i].setTitle(keyboard.next());
                    }

                }

                System.out.println("First name (given name)");
                list[i].setFirstName(keyboard.next());

                System.out.println("A last name (family name/surname)");
                list[i].setFamilyName(keyboard.next());

nhouser9 · Accepted Answer · 2016-04-07 02:47:07Z

1

I suspect it is an error having to do with how you get your inputs. Try this instead and let me know if it works:

System.out.println("\nTitle of the student (eg, Mr, Ms): ");
String title = keyboard.next();

while (!title.equals("Mr") && !title.equals("Ms") && !title.equals("mr") && !title.equals("ms")) {
{
  System.out.println("Attention! Title must be Mr or Ms please choose one.");

  System.out.println("\nTitle of the student (eg, Mr, Ms): ");
  title = keyboard.next();
}

list[i].setTitle(title);

Just a note - nextLine() is probably more robust than next(), because it handles bugs if the user enters something with a space like "My Title"

edited Apr 7, 2016 at 2:47

answered Apr 7, 2016 at 2:39

nhouser9

6,7803 gold badges23 silver badges43 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

OneCricketeer Over a year ago

Using nextLine would be better than next

nhouser9 Over a year ago

almost certainly true, but i was trying to stick to the asker's original functionality as closely as possible.

Stiller77 Over a year ago

Cool!! I love Stackoverflow. Thank you very much @nhouser9

nhouser9 Over a year ago

@Stiller77 Happy to help =)

Collectives™ on Stack Overflow

Java input validation. Does anyone know why that doesn't work?

1 Answer 1

4 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

4 Comments

Your Answer

Sign up or log in

Post as a guest

Related