is palindrome implementations

IsPalindrome.java

// using StringBuffer
boolean isPalindrome(String s) {
    StringBuffer stringBuffer = new StringBuffer(s);
    StringBuffer reverse = new StringBuffer(s);
    reverse.reverse();
    return stringBuffer.toString().equals(reverse.toString());
}

// in place 
boolean isPalindrome(String input) {
	for(int head = 0, tail = input.length() - 1; head <= tail; head++, tail--) {
		if(input.charAt(head) != (input.charAt(tail)) {
			return false; 
		}
	}
	return true; 
}