就以下代碼而言，我遇到了一個(gè)問(wèn)題，即一切都運(yùn)行良好，但我沒(méi)有得到所需的輸出。代碼應(yīng)該接受用戶輸入并打印它，但所有字母的大小寫(xiě)都顛倒了。然而，即使在將輸入返回到 toggleStringCase 后，toggleCase 正常工作，它也會(huì)恢復(fù)到它被發(fā)送到 toggleCase 之前的狀態(tài)。我無(wú)法理解為什么會(huì)發(fā)生這種情況。有人可以指出我正確的方向。理想情況下，我不希望你告訴我答案，而只是幫助我以正確的方式解決這個(gè)問(wèn)題。package loopy;import java.io.*;public class loopy {    public static void main (String[] args) throws IOException {        // TODO: Use a loop to print every upper case letter        for (int i = 65; i < 91; i++) {            System.out.println((char)i);        }        // TODO: Get input from user. Print the same input back but with cases swapped. Use the helper functions below.         BufferedReader in = new BufferedReader(new InputStreamReader(System.in));        String input = in.readLine();        in.close();             toggleStringCase(input);        BufferedWriter out = new BufferedWriter(new OutputStreamWriter(System.out));        out.write(input);        out.close();    }    //Takes a single Character and reverse the case if it is a letter    private static char toggleCase(char c) {        int asciiValue = (int) c;        if (asciiValue > 96 && asciiValue < 123){            asciiValue = asciiValue - 32;        }        else if (asciiValue > 64 && asciiValue < 91){            asciiValue = asciiValue + 32;        }        else {        }        c = (char) asciiValue;        return c;    }    // Splits a string into individual characters that are sent to toggleCase to have their case changed    private static String toggleStringCase(String str) {        String reversedCase = new String();        for (int i = 0; i < str.length(); i++) {            char letter = str.charAt(i);            toggleCase(letter);            reversedCase = reversedCase + letter;        }        str = reversedCase;        return str;    }}