Java SHA-256 HackerRank Solution

Java SHA-256 HackerRank Solution

Hello Friends, How are you? Today I am going to solve the HackerRank Java SHA-256 Problem with a very easy explanation. In this article, you will get more than one approach to solve this problem. So let's start-

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Java SHA-256 HackerRank Solution

HackerRank Java SHA-256 Solution - Problem Statement

Cryptographic hash functions are mathematical operations run on digital data; by comparing the computed hash (i.e., the output produced by executing a hashing algorithm) to a known and expected hash value, a person can determine the data's integrity. For example, computing the hash of a downloaded file and comparing the result to a previously published hash result can show whether the download has been modified or tampered with. In addition, cryptographic hash functions are extremely collision-resistant; in other words, it should be extremely difficult to produce the same hash output from two different input values using a cryptographic hash function.

Secure Hash Algorithm 2 (SHA-2) is a set of cryptographic hash functions designed by the National Security Agency (NSA). It consists of six identical hashing algorithms (i.e., SHA-256, SHA-512, SHA-224, SHA-384, SHA-512/224, SHA-512/256) with a variable digest size. SHA-256 is a 256-bit (32 bytes) hashing algorithm which can calculate a hash code for the input of up to 264 - 1 bits. It undergoes 64 rounds of hashing and calculates a hash code that is a 64-digit hexadecimal number.

Given a string, s, print its SHA-256 hash 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 SHA-256 encryption value of s on a new line.

Sample Input 0

HelloWorld {codeBox}

Sample Output 0


Sample Input 1


Sample Output 1


Java SHA-256 Hacker Rank Solution

Approach I: Java SHA-256 HackerRank Java Solution

// ========================
//       Information
// ========================

// Name: Java SHA-256 HackerRank Problem
// Direct Link:
// Difficulty: Medium
// Max Score: 30
// Language: Java 8

// ========================
//         Solution Start
// ========================

// Java SHA-256 - Hacker Rank Solution Start

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 SHA-256 */
        MessageDigest md = MessageDigest.getInstance("SHA-256");
        byte[] digest = md.digest();
        /* Print the encoded value in hexadecimal */
        for (byte b : digest) {
            System.out.format("%02x", b);

// Java SHA-256 Hacker Rank Solution END
// MyEduWaves

Disclaimer: The above Problem ( Java SHA-256 ) is generated by Hackerrank but the Solution is Provided by MyEduWaves. This tutorial is only for Educational and Learning purposes. Authority if any of the queries regarding this post or website fill the contact form.

I hope you have understood the solution to this HackerRank Problem. All these three solutions will pass all the test cases. Now visit Java SHA-256 Hackerrank Problem and try to solve it again.

All the Best!

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