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Question

我是 Java 編碼的初學者，我的練習是猜數字游戲。

我至少有 90% 的代碼是正確的，但我唯一的問題是我不知道如何讓它保持玩家輸入的答案，而不是 integer，他們輸入一個字母或單詞。

這是我的代碼：

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

public class Practice {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);

        Random number = new Random();
        int numberToGuess = number.nextInt(50);
        int numberOfTries = 0;
        int guess;

        boolean win = false;

        try {
            while (win == false) {

                System.out.println("Guess a number between 1 to 50:");
                guess = s.nextInt();
                numberOfTries++;

                if (guess == numberToGuess) {
                    win = true;
                } else if (guess < 0) {
                    System.out.println("Invalid Number");
                } else if (guess >= 51) {
                    System.out.println("Number Exceeds Limit");
                } else if (guess < numberToGuess) {
                    System.out.println("Too low; Guess again~");
                } else if (guess > numberToGuess) {
                    System.out.println("Too high; Guess again~");
                } else {
                    System.out.println("I think that is incorrect...");
                }
            }

            System.out.println("You Win!");
            System.out.println("The Number was:" + numberToGuess);
            System.out.println("It took you:" + numberOfTries + " tries");

        } catch (InputMismatchException e) {
            System.out.println("I think something is wrong...");

        } finally {
            System.out.println("Please restart the Game if you wish to continue. Sorry for the Inconveniece");
        }
    }
}

Answer 1

這將一直有效，直到用戶輸入 integer；

    boolean flag =true;
    while(flag){
        try {
            Integer.parseInt(new Scanner(System.in).next());
            flag=false;
        } catch(NumberFormatException ne) {
            System.out.print("That's not a whole number.\n");
        }
    }