javaSHA-256.java

import java.io.*;
import java.util.*;
import java.math.BigInteger;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Scanner;


public class Solution {
    
     public static byte[] getSHA(String input) throws NoSuchAlgorithmException
    {
        MessageDigest md = MessageDigest.getInstance("SHA-256");
        return md.digest(input.getBytes(StandardCharsets.UTF_8));
    }
    
    public static String toHexString(byte[] hash)
    {
        // Convert byte array into signum representation
        BigInteger number = new BigInteger(1, hash);
 
        // Convert message digest into hex value
        StringBuilder hexString = new StringBuilder(number.toString(16));
 
        // Pad with leading zeros
        while (hexString.length() < 64)
        {
            hexString.insert(0, '0');
        }
 
        return hexString.toString();
    }
    
    
    public static void main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
        
        try
        {
            Scanner sc = new Scanner(System.in);
            String s2= sc.nextLine();
            System.out.println(toHexString(getSHA(s2)));
        }
        catch (NoSuchAlgorithmException e) {
            System.out.println("Exception thrown for incorrect algorithm: " + e);
        }
        
    }
}