How to end loop for game?

[javaboy2]

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 :(

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();
            
        } 
     }    
}

[DiamondSoul]

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

[javaboy2]

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.

[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.

[DiamondSoul]

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());

[javaboy2]

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.

This did the trick! Thanks guys