Java SHA-256

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;
import java.security.MessageDigest;

public class Solution {

    public static void main(String[] args) {
        Scanner sn = new Scanner(System.in);
        String data = sn.nextLine();
        Solution sj = new Solution();
        sj.getSHA256Hash(data);
        
    }

    /**
     * Returns a hexadecimal encoded SHA-256 hash for the input String.
     * @param data
     * @return String
     */
    private void getSHA256Hash(String data) {
        String result = null;
        try {
            MessageDigest digest = MessageDigest.getInstance("SHA-256");
            byte[] hash = digest.digest(data.getBytes("UTF-8"));
            bytesToHex(hash);
            
        }catch(Exception ex) {
            ex.printStackTrace();
        }
       
    }
    
    /**
     * Use javax.xml.bind.DatatypeConverter class in JDK to convert byte array
     * to a hexadecimal string. Note that this generates hexadecimal in upper case.
     * @param hash
     * @return 
     */
    private void  bytesToHex(byte[] hash) {
        //convert the byte to hex format method 2
        StringBuffer hexString = new StringBuffer();
    	for (int i=0;i<hash.length;i++) {
    		String hex=Integer.toHexString(0xff & hash[i]);
   	     	if(hex.length()==1) hexString.append('0');
   	     	hexString.append(hex);
    	}
        System.out.println(hexString);
        
    }
}