java - 如何将 "****"字符串中的某个字符替换为作为输入的字符？ java

Question

以下是该方法的说明:

// Given a character, a String containing a word, and a String containing a 'guess'
// for that word, return a new String that is a modified version of the 'guess' 
// string where characters equal to the character inChar are uncovered.
// For example, given the following call:
//   modfiyGuess('G',"GEOLOGY", "**O*O*Y")
// This functions should return the String "G*O*OGY".

这是我的代码:

private static String modifyGuess(char inChar, String word, String currentGuess) {
    int count= 0;
    int occur= 0;
    while (count < word.length()-1)
    {
        if(!(word.charAt(count)== inChar)){

            count++;
        }
        else if(word.charAt(count)==inChar)
        {
            currentGuess= currentGuess.replace(currentGuess.charAt(count), inChar);
            occur++;
            count++;
        }
    }
    System.out.println("The character " +inChar +" occurs in " +occur +" positions");
    System.out.println(" ");
    return currentGuess;
}

由于某种原因，如果在字符串 word 中找到了字符 inChar，则 currentGuess 将作为类似“GGGGGG”的字符串返回，用 inChar 替换字符串中的所有字符，而不是返回类似“G*** G”感谢您提供的任何答案!

Answer 1

如果是我，我会选择使用 for 循环而不是 while，这确实是个人喜好，但因为您需要迭代整个字符串，所以对于使用 for 时的 reader。

似乎你的 if 条件是彼此相反的。您检查它是否不等于该字符，然后检查它是否等于。为什么不直接检查一下是否是这样，然后您就知道它不是了。这里字符串生成器用于构建字符串。如果要替换，则替换，如果不替换，我们会附加结果(名称已调整，因此您必须执行一些操作才能使用它。)

public static String modifyGuess(char letter, String word, String result) {
    int occurrences = 0;
    StringBuilder builder = new StringBuilder();
    for(int i = 0; i < word.length(); ++i) {
        if(word.charAt(i) == letter) {
            builder.append(letter);
            occurrences++;
        } else {
            builder.append(result.charAt(i));
        }
    }
    System.out.println("\nThe character " + letter +" occurs in " + occurrences +" positions\n");
    return builder.toString();
}

public static void main(String[] args){
    String word = "GEOLOGY";
    String result = "**OLO**";

    result = modifyGuess('G', word, result);
    System.out.println(result);
    result = modifyGuess('E', word, result);
    System.out.println(result);
    result = modifyGuess('Y', word, result);
    System.out.println(result);
}//SSCCE1

输出:

The character G occurs in 2 positions

G*OLOG*

The character E occurs in 1 positions

GEOLOG*

The character Y occurs in 1 positions

GEOLOGY