HackerRank Java MD5 problem solution

In this HackerRank Java MD5 problem in java programming MD5 (Message-Digest algorithm 5) is a widely-used cryptographic hash function with a 128-bit hash value. Here are some common uses for MD5:

• To store a one-way hash of a password.
• To provide some assurance that a transferred file has arrived intact.

HackerRank Java8 MD5 problem solution.

import java.io.*;
import java.util.*;
import java.security.MessageDigest;
import java.util.Scanner;

public class Solution {

    public static void main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
        Scanner sc = new Scanner(System.in);
        String str = sc.next();
        sc.close();
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(str.getBytes());
            // return bytesToHex(md.digest
            byte[] digest = md.digest();
            for (byte b : digest) {
                System.out.printf("%02x", b);
            }
        } catch (Exception ex) {
            throw new RuntimeException(ex);
        }
    }
}

Second solution in java 7 programming.

import java.security.MessageDigest;
import java.nio.charset.Charset;
import java.util.Scanner;

public class Solution {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String message = in.nextLine();
        in.close();

        try {
            MessageDigest messageDigest 
                = MessageDigest.getInstance("MD5");
            messageDigest.update(message.getBytes());
            byte[] hash = messageDigest.digest();

            for (byte b : hash) {
                System.out.printf("%02x", b);
            }
        } catch (Exception e) {}
    }

}