How to end loop for game?

I'm trying to end a loop for a ro-sham-bo game, but instead of asking for input, the program just breaks. I'm chobo :(

Code:

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import java.util.Scanner;

public class rps
{
    public static void main (String[] args)
    {
        Scanner scan = new Scanner(System.in);   
        int rock = 1;
        int paper = 2;
        int scissors = 3;
        int input;
        String weapon1 = "a";
        String weapon2 = "a";
        String again = "y";
        while (again.equals("Y") || again.equals ("y"))
        {
            System.out.println ("Rock, paper, scissors! Pick your weapon: Rock = 1, Paper = 2, Scissors = 3");
            input = scan.nextInt();
            while (input < 1 || input > 3)
            {
                System.out.println ("NOPE! Pick your weapon: Rock = 1, Paper = 2, Scissors = 3");
                input = scan.nextInt();
            }
       
            if (input == 1)
                weapon1 = "rock";
            if (input == 2)
                weapon1 = "paper";
            if (input == 3)
                weapon1 = "scissors";
       
            int opponent = (int)(Math.random() * 3 +1);
            if (opponent == 1)
                weapon2 = "rock";
            if (opponent == 2)
                weapon2 = "paper";
            if (opponent == 3)
                weapon2 = "scissors";
       
       
       
            if  (input == opponent)
            {
                System.out.println ("You both picked " + weapon1+ ". DRAW!");
            }
       
       
            else if (input == 1 && opponent == 2)
            {
                System.out.println ("You picked " + weapon1+ ". The computer picked " +weapon2+". You should quit life.");
            }
            else if (input == 1 && opponent == 3)
            {
                System.out.println ("You picked " +weapon1+ ". The computer picked " +weapon2+". You win!");
            }
           
            else if (input == 2 && opponent == 1)
            {
                System.out.println ("You picked " +weapon1+ ". The computer picked " +weapon2+". You win!");
            }
            else if (input == 2 && opponent == 3)
            {
                System.out.println ("You picked " +weapon1+ ". The computer picked " +weapon2+". You win!");
            }
            else if (input == 3 && opponent == 1)
            {
                System.out.println ("You picked " +weapon1+ ". The computer picked " +weapon2+". You lose");
            }
            else if (input == 3 && opponent == 2)
            {
                System.out.println ("You picked " +weapon1+ ". The computer picked " +weapon1+". You win");
            }
            System.out.println ("Play again? (Y/N)");
            again = scan.nextLine();
           
        }
    }   
}

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Is it throwing an exception? If so, telling us exactly what the exception is and on what line it is thrown would be helpful.

It doesn't throw an exception. It just ends the program. It won't ask the user to input anything after printing "Play again" and just ends.

Looks like you have fallen for the pitfall caused by nextInt not consuming an end of line character when a user enters their choice. For a full explanation do a search. Simple solution make a call to nextLine after the call to nextInt.

Hmm, I'm not sure, but I suspect the nextInt() method leaves a superfluous newline in the input buffer. To fix, change both instances of scan.nextInt() to Integer.parseInt(scan.nextLine());

Quote:

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Originally Posted by Junky

Looks like you have fallen for the pitfall caused by nextInt not consuming an end of line character when a user enters their choice. For a full explanation do a search. Simple solution make a call to nextLine after the call to nextInt.

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This did the trick! Thanks guys