Java判斷迴文字符串

public class Palindrome {
    public static boolean isPalindrome(String s) {
        int len = s.length();
        for (int i = 0; i < len / 2; i++)
            if (s.charAt(i) != s.charAt(len - i - 1))
                return false;
        return true;
    }

    public static void main(String[] args) {
        System.out.println(isPalindrome("helleh"));
        System.out.println(isPalindrome(""));
        System.out.println(isPalindrome("ababa"));
    }
}