“赋值的左边必须是一个变量"charAt 的问题 [英] "The left-hand side of an assignment must be a variable" problem with charAt

问题描述

private String kNow(String state, String guess) {
        for (int i = 0; i < word.length(); i++) {
            if (guess.equals(word.charAt(i))) {
                state.charAt(i) = word.charAt(i);
            }
        }
        return state;
    }

state.charAt(i) 部分指出了标题中的问题.如果我的方法不是完全错误，我该如何解决问题.

state.charAt(i) part points the problem in the title. How can I solve the problem, if my approach is not completely wrong.

推荐答案

这个不行的原因是因为charAt(int x)是String class - 即它是一个函数，您不能在 Java 中为函数赋值.

The reason this doesn't work is because charAt(int x) is a method of the String class - namely it is a function, and you can't assign a function a value in Java.

如果你想逐个字符地遍历一个字符串，我可能会想这样做:

If you want to loop through a string character by character, I might be tempted to do this:

Char[] GuessAsChar = guess.toCharArray();

然后对 GuessAsChar 进行操作.根据您的需要，有可能更好(如更简洁)的方法来搜索字符串中的字符等效性.

Then operate on GuessAsChar instead. There are, depending on your needs, possibly better (as in neater) ways to approach searching for character equivalence in strings.

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