SHA-256

sha256.java

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

public class sha256 {

    public static void main(String[] args) throws Exception{
        Scanner scr = new Scanner(System.in);
        String str = scr.next();
        byte[] bytesOfMessage = str.getBytes();
        MessageDigest md = MessageDigest.getInstance("SHA-256");
        md.update(str.getBytes(),0,str.length());
        System.out.println(toHex(md.digest()));
    }
    
    private static final char[] HEX_DIGITS = "0123456789abcdef".toCharArray();
    public static String toHex(byte[] data) {
        char[] chars = new char[data.length * 2];
        for (int i = 0; i < data.length; i++) {
            chars[i * 2] = HEX_DIGITS[(data[i] >> 4) & 0xf];
            chars[i * 2 + 1] = HEX_DIGITS[data[i] & 0xf];
        }
        return new String(chars);
    }
}