// Compare the first and last characters of the string
        if (str.charAt(0) == str.charAt(str.length() - 1)) {
            // If they match, check the substring between the first and last characters
            // by recursively calling isPalindrome on the substring
            return isPalindrome(str.substring(1, str.length() - 1));
        }

        // If the first and last characters don't match, the string is not a palindrome
        return false;
    }

    public static void main(String[] args) {
        String str = "racecar"; // Change this string as needed

        if (isPalindrome(str)) {
            System.out.print("Yes, it's a palindrome.");
        } else {
            System.out.print("No, it's not a palindrome.");
        }
    }