HackerRank Java SHA-256 problem solution

HackerRank Java SHA-256 problem solution – In this HackerRank Java SHA-256 problem in the java programming language 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.

HackerRank Java SHA-256 problem solution.

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

public class Solution {

    public static void main(String[] args) throws NoSuchAlgorithmException {
        Scanner input = new Scanner(System.in);
        MessageDigest m = MessageDigest.getInstance("SHA-256");
        m.reset();
        m.update(input.nextLine().getBytes());
        for (byte i : m.digest()) {
            System.out.print(String.format("%02x", i));
        }
        System.out.println();
    }
}

Second solution

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

public class Solution {

    public static void main(String[] args) throws NoSuchAlgorithmException {
        Scanner input = new Scanner(System.in);
        MessageDigest m = MessageDigest.getInstance("SHA-256");
        m.reset();
        m.update(input.nextLine().getBytes());
        for (byte i : m.digest()) {
            System.out.print(String.format("%02x", i));
        }
        System.out.println();
    }
}