java - 石头、剪刀、布-BlueJ 疯狂循环

Question

以下是我在 BlueJ 中编写的石头剪刀布游戏的代码。当我编译并且用户输入输入时，计算机立即从playerWins()打印大量输出。当用户输入“退出”时游戏结束。有人可以帮助我，这样我的屏幕就不会被淹没吗？ (如果有任何方法可以压缩我的代码，那就太好了)。

import java.util.Random;
import java.util.Scanner;

public class RockPaperScissors
{

    public static void main(String[] args)
    {
        int wins = 0, losses = 0, ties = 0;
        boolean output;
        Scanner scan = new Scanner(System.in);
        System.out.print("(R)ock, (P)aper, (S)cissors, or quit: ");
        String playerChoice = scan.nextLine();
        while (playerChoice.equals("quit") == false)
        {      
            playerChoice = playerChoice.toUpperCase();
            String computerChoice = getComputerChoice();
            if(playerChoice.equals(computerChoice) != true)
            {
                output = playerWins(playerChoice, computerChoice);
                if (output == true)
                {
                    wins++;
                }
                else if (output == false)
                {
                    losses++;
                }
            }
            else
            {
                ties++;
                System.out.println("Tie!");
            }
        }
        System.out.println("QUIT");
        System.out.println("Wins: " + wins);
        System.out.println("Losses: " + losses);            
        System.out.println("Ties: " + ties); 
        scan.close();
    }
    public static String getComputerChoice()
    {
        Random gen = new Random();
        int num = gen.nextInt(30) + 1;
        if (num % 3 == 2)
        {
            return "R";
        }
        else if (num % 3 == 1)
        {
            return "P";
        }
        else
        {
            return "S";
        }
    }
    public static boolean playerWins(String playerChoice, String computerChoice)
    {
        if (playerChoice.equals("R") == true)
        {
            if (computerChoice.equals("P") == true)
            {
                System.out.println("My Point! \nP beats R"); // Rock is beaten by paper
                return false;
            }
            else if (computerChoice.equals("S") == true)
            {
                System.out.println("Your Point! \nR beats S"); // Rock beats scissors
                return true;
            }
        }
        else if (playerChoice.equals("P") == true)
        {
            if (computerChoice.equals("R") == true)
            {
                System.out.println("Your Point! \nP beats R"); //Paper beats rock
                return true;
            }
            else if (computerChoice.equals("S") == true)
            {
                System.out.println("My Point! \nS beats P"); //Paper is beaten by scissors
                return false;
            }
        }
        else if (playerChoice.equals("S") == true)
        {
            if (computerChoice.equals("P") == true)
            {
                System.out.println("Your Point! \nS beats P"); //Scissor beats paper
                return true;
            }
            else if (computerChoice.equals("R") == true)
            {
                System.out.println("My Point! \nR beats S"); //Scissors is beaten by rock
                return false;
            }
        }
        return false;
    }
}

Answer 1

这两行是问题所在:

String playerChoice = scan.nextLine();
while (playerChoice.equals("quit") == false) {

您正在阅读一行，然后一遍又一遍地检查该行。您需要在循环内读取新行。按照你现在的方式，它只是试图无数次地重复相同的 Action 。

尝试:

String playerChoice = scan.nextLine();
while (playerChoice.equals("quit") == false) {

    //do all of the stuff that is already inside your loop

    playerChoice = scan.nextLine();
}

每次处理最后一个输入后，这都会再次获取用户输入。