java - 如何更改 char 数组中的 2 个以上值？

Question

我将字符串转换为字符数组，我想知道是否有办法替换数组中的 2 个或更多值？

我正在开发一个字符串猜测游戏，这是一项家庭作业，用户输入一个句子或单词，然后用户输入一个字母，如果该字母是输入的一部分，则猜测字符串会更新并替换其“？与用户猜测的字母。

例如:

User enters: racer

Original String: racer
Guess String:?????
Please guess a character

User enters: a

Original String: racer
Guess String:?a???

String input = "This is a string";
input = input.toLowerCase();
int inputLength = input.length();
System.out.println("You entered: " + input
            + "\n" + "The string length is: " + inputLength);
String answerString = "?".repeat(inputLength);
int answerStringLength = answerString.length();
System.out.println(answerString);
System.out.println(answerStringLength);

System.out.println("Guess a letter");
String guess = scan.nextLine();
System.out.println(guess);
int guessLength = guess.length();
System.out.println(guessLength);
while (guessLength != 1) {
    guess = scan.nextLine();
    guessLength = guess.length();
    System.out.println(guessLength);
}
System.out.println(guess);
String guessRepeat = guess.repeat(3);
char guessChar=guessRepeat.charAt(2);
System.out.println(guessChar);

int checkGuess = input.indexOf(guess);

char[] answerStringChars = answerString.toCharArray();
answerStringChars[checkGuess]=guessChar;
String newAnswerString = String.valueOf(answerStringChars);
System.out.println(newAnswerString);

If the guessed letter is 'i'
Actual Results:
??i?????????????
Expected Results:
??i??i??????i???

Answer 1

尝试使用此循环替换所有值，而不是仅替换第一个值:

char[] answerStringChars = answerString.toCharArray();
for (int i = 0; i < answerString.length(); i++) {
    if (input.charAt(i) == guessChar) {
        answerStringChars[i] = guessChar;
    }
}
String newAnswerString = String.valueOf(answerStringChars);

这应该可以完成工作。