如何在字符串java中互换两个字符(L和R

char[] charArray = str.toCharArray();

char temp = charArray[index1];
charArray[index1] = charArray[index2];
charArray[index2] = temp;

String swappedStr = new String(charArray);

public class StringSwapExample {
    public static void main(String[] args) {
        String str = "java";
        char[] charArray = str.toCharArray();

        // 互换字符
        int index1 = str.indexOf('L');
        int index2 = str.indexOf('R');
        char temp = charArray[index1];
        charArray[index1] = charArray[index2];
        charArray[index2] = temp;

        // 转换回字符串
        String swappedStr = new String(charArray);
        System.out.println("互换后的字符串：" + swappedStr);
    }
}