How can I clear the Scanner buffer in Java?

Question

I have something like this:

    Scanner in=new Scanner(System.in);     int rounds = 0;     while (rounds < 1 || rounds > 3) {         System.out.print("How many rounds? ");         if (in.hasNextInt()) {             rounds = in.nextInt();         } else {             System.out.println("Invalid input. Please try again.");             System.out.println();         }         // Clear buffer     }     System.out.print(rounds+" rounds."); 

How can I clear the buffer?

Edit: I tried the following, but it does not work for some reason:

while(in.hasNext())     in.next(); 

Answer 1

Try this:

in.nextLine(); 

This advances the Scanner to the next line.