java - 添加 while 循环，使用户输入的石头剪刀布游戏重复进行，直到用户结束游戏

Question

好的，我已经编写了一个简单的石头剪刀布游戏，使用用户输入来玩。用户输入他们的选择，随机函数选择计算机运行，然后生成结果。此后程序将终止，因为它已完成。我想使用 while 循环，这样当游戏结束时，它会再次开始，然后如果用户输入 exit 或 quit ，程序就会停止，这可以只需说一些类似 while playerGo != exit, play the game blah blah 的内容即可轻松完成。但是，我无法让它工作，有人可以帮助我吗，我是一个 Java 菜鸟:)

import java.util.Scanner;   

public class RockPaperScissors{   
  public static void main(String[] args){  

    Scanner input = new Scanner(System.in);

    int compGoInt;
    String compGo;
    String playerGo;

    System.out.println("You can type 'Exit' to quit the game at any time.");
    System.out.print("Please enter your choice. Rock, Paper or Scissors: ");
    playerGo = input.nextLine();

    compGoInt = (int) (Math.random() * 3);

    switch (compGoInt){
    case 0:
        compGo = "Rock";
        break;
    case 1:
        compGo = "Paper";
        break;
    case 2:
        compGo = "Scissors";
        break;
    default:
        compGo = "Error";
        System.out.println("Error.");
        break;
    }

    if (playerGo.equals(compGo)){
        System.out.println("Computer chooses "+compGo);
        System.out.println("It's a draw!");
    }

    else if ((playerGo.equalsIgnoreCase("Rock") && compGo.equalsIgnoreCase("Scissors")) ||
            (playerGo.equalsIgnoreCase("Paper") && compGo.equalsIgnoreCase("Rock")) ||
            (playerGo.equalsIgnoreCase("Scissors") && compGo.equalsIgnoreCase("Paper"))){
        System.out.println("Computer chooses "+compGo);
        System.out.println("Player Wins!");
    }

    else if ((compGo.equalsIgnoreCase("Rock") && playerGo.equalsIgnoreCase("Scissors")) ||
            (compGo.equalsIgnoreCase("Paper") && playerGo.equalsIgnoreCase("Rock")) ||
            (compGo.equalsIgnoreCase("Scissors") && playerGo.equalsIgnoreCase("Paper"))){
        System.out.println("Computer chooses "+compGo);
        System.out.println("Computer Wins!");
    }

    else{
        System.out.println("Something has gone wrong!");
        System.out.println("Player chose "+playerGo);
        System.out.println("Computer chose "+compGo);
    }


}

}

Answer 1

简单地说:

while(true) {
     if(playerGo.equalsIgnoreCase("Exit")) break;
     else //GameLogic
}

不过，如果我可以这么说，您应该让用户选择一个数字，因为任何字母输入都容易出错。

出于澄清目的:

import java.util.Scanner;   

public class RockPaperScissors{   
    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        int compGoInt;
        String compGo;
        String playerGo;

        while(true) {
            System.out.println("You can type 'Exit' to quit the game at any time.");
            System.out.print("Please enter your choice. Rock, Paper or Scissors: ");
            playerGo = input.nextLine();

            if(playerGo.equalsIgnoreCase("Exit")) break;    //Checks for exit condition.
            else { //GameLogic

                compGoInt = (int) (Math.random() * 3);

                switch (compGoInt){
                case 0:
                    compGo = "Rock";
                    break;
                case 1:
                    compGo = "Paper";
                    break;
                case 2:
                    compGo = "Scissors";
                    break;
                default:
                    compGo = "Error";
                    System.out.println("Error.");
                    break;
                }

                if (playerGo.equals(compGo)){
                    System.out.println("Computer chooses "+compGo);
                    System.out.println("It's a draw!");
                }

                else if ((playerGo.equalsIgnoreCase("Rock") && compGo.equalsIgnoreCase("Scissors")) ||
                        (playerGo.equalsIgnoreCase("Paper") && compGo.equalsIgnoreCase("Rock")) ||
                        (playerGo.equalsIgnoreCase("Scissors") && compGo.equalsIgnoreCase("Paper"))){
                    System.out.println("Computer chooses "+compGo);
                    System.out.println("Player Wins!");
                }

                else if ((compGo.equalsIgnoreCase("Rock") && playerGo.equalsIgnoreCase("Scissors")) ||
                        (compGo.equalsIgnoreCase("Paper") && playerGo.equalsIgnoreCase("Rock")) ||
                        (compGo.equalsIgnoreCase("Scissors") && playerGo.equalsIgnoreCase("Paper"))){
                    System.out.println("Computer chooses "+compGo);
                    System.out.println("Computer Wins!");
                }

                else{
                    System.out.println("Something has gone wrong!");
                    System.out.println("Player chose "+playerGo);
                    System.out.println("Computer chose "+compGo);
                }
            }
        }
    }
}