Problem Name: Java MD5

Problem Link:

In this HackerRank Functions in Java programming problem solution,

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.

MD5 is one in a series of message digest algorithms designed by Professor Ronald Rivest of MIT (Rivest, 1994 ); however, the security of MD5 has been severely compromised, most infamously by the Flame malware in 2012 . The CMU Software Engineering Institute essentially considers MD5 to be "cryptographically broken and unsuitable for further use". Given an alphanumeric string, s , denoting a password, compute and print its MD5 encryption value.

Input Format

A single alphanumeric string denoting s.


  • 6 <= |s| <= 20
  • String s consists of English alphabetic letters (i.e., [a - zA - Z] and/or decimal digits (i.e., 0 through 9) only.

Output Format

Print the MD5 encryption value of

on a new line.

Sample Input 0


Sample Output 0


Sample Input 1


Sample Output 1





Code Examples

#1 Code Example with Java Programming

Code - Java Programming

import java.util.Scanner;

public class Solution {
    public static void main(String[] args) throws NoSuchAlgorithmException {
        /* Read and save the input String */
        Scanner scan = new Scanner(;
        String str =;
        /* Encode the String using MD5 */
        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] digest = md.digest();
        /* Print the encoded value in hexadecimal */
        for (byte b : digest) {
            System.out.format("%02x", b);
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