Java 8 coding challenge: Palindromic String

Problem:

You have been given a String $S$. You need to find and print whether this string is a palindrome or not. If yes, print "YES" (without quotes), else print "NO" (without quotes).

Input Format
The first and only line of input contains the String $S$. The String shall consist of lowercase English alphabets only.

Output Format
Print the required answer on a single line.

Constraints $1\le |S|\le 100$

Note
String $S$ consists of lowercase English Alphabets only.

SAMPLE INPUT

aba

SAMPLE OUTPUT

YES

Code:

/* IMPORTANT: Multiple classes and nested static classes are supported */
 
/*
 * uncomment this if you want to read input.
//imports for BufferedReader
import java.io.BufferedReader;
import java.io.InputStreamReader;
*/
//import for Scanner and other utility classes
import java.util.*;
 
 
class TestClass {
 public static void main(String args[] ) throws Exception {
 /*
 * Read input from stdin and provide input before running
 * Use either of these methods for input
 
 //BufferedReader
 BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
 String line = br.readLine();
 int N = Integer.parseInt(line);
 */
 //Scanner
 Scanner s = new Scanner(System.in);
 String S = s.nextLine();
 String result="";
 
 for (int i = S.length()-1; i >=0; i--) {
 result=result+S.substring(i,i+1);
 }
 if(result.equals(S)){
 System.out.println("YES");
 }
 else{
 System.out.println("NO");
 }
 }
}