Question

I am writing a command line program and would like to make the the user to enters a valid age (integer). By using the Scanner class, I have something like this:

int getAge() {
   Scanner = new Scanner(System.in);
   int age;
   boolean isValid = false;

   while(!isValid) {
      System.out.println("Please enter your age");
      if (myScanner.hasNext()) {
        if (myScanner.hasNextInt()) {
           age = myScanner.nextInt();
           isValid = true;
        } else {
           System.out.println("Please enter an integer");
        }
      }
   }

   return age;
} 

The problem being that while in the loop it keeps reading input without waiting for a new value. How can I get around this?

Answer 1

You are not reading any token in your else path thus processing the same input over and over again. Just add the following line

myScanner.next();

inside the else-block.