Java猜測游戲（特別是JOptionPane）

Question

所以我最近自學了一些JOptionPane。 我正在嘗試制作一個使用JOptionPane的Guessing游戲。 目前，這是我的代碼：

import javax.swing.JOptionPane;
import java.util.Scanner;
import java.util.Random;

public class GuessingGameJOptionPane {

public static void main(String[] args) {

    int guess, numberToGuess, numberOfTries = 0;
    String input;
    boolean win;

    Scanner scan = new Scanner(System.in);

    Random rand = new Random();

    numberToGuess = rand.nextInt(100);

    JOptionPane.showInputDialog(null, null,"Please enter your name.", JOptionPane.QUESTION_MESSAGE);

    win = false;



    int guess1 = Integer.parseInt(JOptionPane.showInputDialog(null,null,"Guess a number between 1 and 1000", JOptionPane.QUESTION_MESSAGE));

    while(win == false){


        numberOfTries++;

       if(numberToGuess < guess1)
        {
            JOptionPane.showMessageDialog(null,"The number you guessed was to low. Please try again" ,null , JOptionPane.INFORMATION_MESSAGE);

        }
        else if(numberToGuess > guess1){
            JOptionPane.showMessageDialog(null,"The number you guessed was to high. Please try again" ,null , JOptionPane.INFORMATION_MESSAGE);
        }
        else{
            JOptionPane.showMessageDialog(null, "Congratulations you won. The number was " + numberToGuess + ". It took you " + numberOfTries, null, JOptionPane.INFORMATION_MESSAGE);
            win = true;
        }


    }//Win == False






}//Main Method

}//類

輸入數字后，它會連續說出您的數字是低還是高，並繼續創建新的窗格。 任何幫助將不勝感激謝謝。

Answer 1

您的問題特別存在於這里：

int guess1 = Integer.parseInt(JOptionPane.showInputDialog(null,null,"Guess a number between 1 and 1000", JOptionPane.QUESTION_MESSAGE));
while(win == false){ //Potential infinite loop begins here...
    numberOfTries++;
   if(numberToGuess < guess1)
    {
        JOptionPane.showMessageDialog(null,"The number you guessed was to low. Please try again" ,null , JOptionPane.INFORMATION_MESSAGE);
    }
    else if(numberToGuess > guess1){
        JOptionPane.showMessageDialog(null,"The number you guessed was to high. Please try again" ,null , JOptionPane.INFORMATION_MESSAGE);
    }
    else{
        JOptionPane.showMessageDialog(null, "Congratulations you won. The number was " + numberToGuess + ". It took you " + numberOfTries, null, JOptionPane.INFORMATION_MESSAGE);
        win = true;
    }


}//Win == False

僅當win = true時，此循環才會退出。 但是，只有在猜出正確的數字后才能發生這種情況。 錯誤的數字輸入將導致循環無限繼續，因為用戶實際輸入數字的唯一時間是在循環輸入之前 。 您可以通過在消息對話框中顯示嘗試次數來證明這一點：您將看到隨后的每個對話框都會將嘗試次數增加一倍。

幸運的是，修復很容易：

while(win == false){ 
    int guess1 = Integer.parseInt(JOptionPane.showInputDialog(null,null,"Guess a number between 1 and 1000", JOptionPane.QUESTION_MESSAGE)); //Moved this inside the loop
// ...rest is unchanged