import java.io.FileInputStream;
import java.security.MessageDigest;

class Program {
	public static void main(String[] args)throws Exception {
		MessageDigest md = MessageDigest.getInstance("MD5");
		FileInputStream fis = new FileInputStream("fajlom.txt");

		byte[] dataBytes = new byte[1024];

		int nread = 0;
		while ((nread = fis.read(dataBytes)) != -1) {
			md.update(dataBytes, 0, nread);
		};
		byte[] mdbytes = md.digest();

		//byte to hex format
		StringBuffer hexString = new StringBuffer();
		for (int i=0; i<mdbytes.length; i++) {
			String hex=Integer.toHexString(0xff & mdbytes[i]);
			if(hex.length()==1) hexString.append('0');
			hexString.append(hex);
		}
		System.out.println("Kivonat hex formaban: " + hexString.toString());
	}
}