java - 重新启动简单的java游戏

Question

这是一个简单的java猜数字游戏。

游戏结束后，我想询问用户是否想再玩一次，例如:你想再玩一次吗？ (回答 Y/N)如果用户输入 Y，游戏将重新开始并随机一个新数字，如果用户回答“N”，游戏将结束。这是我的代码:

import static java.lang.Math.*;
import java.util.Scanner;


public class HomeWorkLoopGame1 {
    public static void main(String[] args) {
        System.out.print("Welcome to number guessing game !\n");
        System.out.println("Guess a number range from 1 to 100, You have 5 guess to win this game");
        int answer = (int) (random()*100);
        Scanner guess1 = new Scanner (System.in);
        System.out.println("To begin please input your number");
        int num1 = guess1.nextInt();
        if (num1<answer) {
            System.out.print(num1);
            System.out.print(" Your answer is too small\n");
            System.out.println("Try again! Please input your second guess");            
        }
        else if (num1>answer){
            System.out.println(num1);
            System.out.print("Your answer is too big\n");
            System.out.println("Try again! Please input your second guess");
        }
        else {
            System.out.println("Congratulation! Your answer is correct! You win !");
        }

        int num2 = guess1.nextInt();
        if (num2<answer) {
            System.out.print(num2);
            System.out.print(" Your answer is too small\n");
            System.out.println("Try again! Please input your third guess");
        }
        else if (num2>answer){
            System.out.println(num2);
            System.out.print("Your answer is too big\n");
            System.out.println("Try again! Please input your third guess");
        }
        else {
            System.out.println("Congratulation! Your answer is correct! You win !");
        }

        int num3 = guess1.nextInt();
        if (num3<answer) {
            System.out.print(num3);
            System.out.print(" Your answer is too small\n");
            System.out.println("Try again! Please input your fourth guess");
        }
        else if (num3>answer){
            System.out.println(num3);
            System.out.print("Your answer is too big\n");
            System.out.println("Try again! Please input your fourth guess");
        }
        else {
            System.out.println("Congratulation! Your answer is correct! You win !");
        }

        int num4 = guess1.nextInt();
        if (num4<answer) {
            System.out.print(num4);
            System.out.print(" Your answer is too small\n");
            System.out.println("Try again! Please input your final guess");
        }
        else if (num4>answer){
            System.out.println(num4);
            System.out.print("Your answer is too big\n");
            System.out.println("Try again! Please input your final guess");
        }
        else {
            System.out.println("Congratulation! Your answer is correct! You win !");
        }

        int num5= guess1.nextInt();
        if (num5<answer) {
            System.out.print(num5);
            System.out.print(" Your answer is too small\n");
            System.out.println("Game Over");
        }
        else if (num5>answer){
            System.out.println(num5);
            System.out.print("Your answer is too big\n");
            System.out.println("Game Over");
        }
        else {
            System.out.println("Congratulation! Your answer is correct! You win !");
        }

        System.out.println("Correct Answer is "+ answer);
        Scanner userReply = new Scanner (System.in);
        char reply;
        System.out.println("Do you want to play again? Answer with Y/N)");
    }
}

Answer 1

你可以尝试这样的事情。顺便说一句，这不是一个好方法。

Scanner userReply = new Scanner(System.in);
System.out.println("Do you want to play again? Answer with Y/N)");
String answer= userReply.nextLine().toLowerCase();
  if("y".equals(answer)){
      main(args); // recursively call
   }else {
      System.out.println("game exit");
   }

您可以使用do-while以正确的方式执行此操作。

更好的方法

 public static void main(String[] args) {
    boolean isValid;
    do {
        isValid = true;
        runGame();
        Scanner userReply = new Scanner(System.in);
        System.out.println("Do you want to play again? Answer with (Y/N)");
        String answer = userReply.nextLine().toLowerCase();
        if ("y".equals(answer)) {
            isValid =true;
        } else {
            isValid =false;
            System.out.println("game exit");
        }
    } while (isValid);

   }

 public static void runGame() {
    // your game logic
 }