虽然条件得到满足，但循环不循环

Question

Here's my code so far (well, the while loop):

public class Lab10d
{
public static void main(String args[])
{
    Scanner keyboard = new Scanner(System.in);
    char response = 0;


    //add in a do while loop after you get the basics up and running

        String player = "";

        out.print("Rock-Paper-Scissors - pick your weapon [R,P,S] :: ");

        //read in the player value
        player = keyboard.next();

        RockPaperScissors game = new RockPaperScissors(player);
        game.setPlayers(player);
        out.println(game);
    while(response == ('y'))
    {
        out.print("Rock-Paper-Scissors - pick your weapon [R,P,S] :: ");
        player = keyboard.next();
        game.setPlayers(player);
        //game.determineWinner();
        out.println(game);
        out.println();

        //



    }
    out.println("would you like to play again? (y/n):: ");
        String resp =  keyboard.next();
        response = resp.charAt(0);
}
}

it's supposed to run the code additional times until an n is inputted

When I input ay, it is supposed to re-run the code but doesn't

Answer 1

Your while loop ends before you ask if they want to play again.

Change the loop to:

while(response == ('y'))
    {
        out.print("Rock-Paper-Scissors - pick your weapon [R,P,S] :: ");
        player = keyboard.next();
        game.setPlayers(player);
        //game.determineWinner();
        out.println(game);
        out.println();
        out.println("would you like to play again? (y/n):: ");
        String resp =  keyboard.next();
        response = resp.charAt(0);
    }

There is another problem: response is not set to 'y' before the loop is started. It will not do anything in the loop at all. Use a do { ... } while (response == 'y') loop instead.

    do
    {
        out.print("Rock-Paper-Scissors - pick your weapon [R,P,S] :: ");
        player = keyboard.next();
        game.setPlayers(player);
        //game.determineWinner();
        out.println(game);
        out.println();
        out.println("would you like to play again? (y/n):: ");
        String resp =  keyboard.next();
        response = resp.charAt(0);
    } while (response == 'y');

A do-while will execute the code once , then check the condition and keep executing if it is true . A while loop will just check the condition, and keep executing while it's true .

EDIT: I put together some code for you:

import java.util.Scanner;

public class Troubleshoot {

    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        char response = ' ';
        do {
            System.out.println("Stuff");
            System.out.print("Again? (y/n): ");
            response = s.next().charAt(0);
        } while (response == 'y');
    }

}

Output:

Stuff
Again? (y/n): y
Stuff
Again? (y/n): y
Stuff
Again? (y/n): n