RecursivePalindrome.java 1

public class RecursivePalindrome {
    public static boolean isPalindrome(String s) {
        return isPalindrome(s, 0, s.length() - 1);
    }

    private static boolean isPalindrome(String s, int low, int high) {
        if (high <= low)
            return true;
        else if (!(s.substring(low, low + 1).equals(s.substring(high, high + 1))))
            return false;
        else
            return isPalindrome(s, low + 1, high - 1);
    }

    public static void main(String[] args) {
        System.out.println("Is moon a palindrome? " + isPalindrome("moon"));
        System.out.println("Is noon a palindrome? " + isPalindrome("noon"));
        System.out.println("Is a a palindrome? " + isPalindrome("a"));
        System.out.println("Is aba a palindrome? " + isPalindrome("aba"));
        System.out.println("Is ab a palindrome? " + isPalindrome("ab"));
    }
}