JAVA Hangman程序在某个索引处显示字母，处理word中字符的多个实例

Question

if (posOfGuessLetter == -1)
    {
        System.out.print("Your letter was not found in the 
        spaces provided");
    } //if
if (posOfGuessLetter == 0)
    {
        displayWordAsDashes = (guessLetter + 
        displayWordAsDashes.substring(posOfGuessLetter + 1));
        displayWord = 
        displayWordAsDashes.substring(posOfGuessLetter + 1);
    } //if
if (posOfGuessLetter == 9)
    {
    displayWordAsDashes = (displayWordAsDashes.substring(0, 
    posOfGuessLetter) + guessLetter);
    displayWord = (displayWordAsDashes.substring(0, 
    posOfGuessLetter));
    } //if
else
    {
        displayWordAsDashes = (displayWordAsDashes.substring(0, 
        posOfGuessLetter) + guessLetter + 
        displayWordAsDashes.substring(posOfGuessLetter + 1));
        displayWord = (displayWordAsDashes.substring(0, 
        posOfGuessLetter) + 
        (displayWordAsDashes.substring(posOfGuessLetter + 1)));
    }

while (displayWord.contains(guessLetter))
    {
        displayWordAsDashes = (displayWordAsDashes.substring(0, 
        posOfGuessLetter) + guessLetter + 
        displayWordAsDashes.substring(posOfGuessLetter + 1));
        displayWord = (displayWordAsDashes.substring(0, 
        posOfGuessLetter) + 
        (displayWordAsDashes.substring(posOfGuessLetter + 1)));
    } //while
    } //else
System.out.print("The updated word is: " + 
displayWordAsDashes);

我正在尝试创建一个hangman程序，在这一部分中，它检查用户输入的索引位置，查找他们想在单词中找到的字符，然后删除该索引上的破折号，并显示他们刚刚猜到的字母。但是，如果单词有两个相同的字母（即缩小，循环），我的程序不会同时显示两个字母，这就是我试图在末尾编写while循环的目的。谁能告诉我我把什么搞砸了吗？？

Answer 1

我没有看到您出现了什么错误，但是由于以下原因，pos==0和pos==9都是多余的

aString.substring(aString.length());

和

aString.substring(0, 0);

两者都返回空字符串。

如果你不需要跟踪这封信在哪里，你可以这样做：

private String wordToGuess = "hangman";
private String guessedSoFar = wordToGuess.replaceAll(".", "-");
private String leftToGuess = wordToGuess;

public String guess(char c) {
    for(int i = 0 ; i < leftToGuess.length() ; i++) {
        if(leftToGuess.charAt(i) == c) {
            guessedSoFar = guessedSoFar.substring(0, i) + c + guessedSoFar.substring(i + 1);
        }
    }
    leftToGuess = leftToGuess.replace(c, '-');
    return guessedSoFar;
}