import javax.crypto.Cipher;

import javax.crypto.KeyGenerator;

import java.security.Key;

import java.security.SecureRandom;

public class KeyGeneratorExample {

public static void main(String args[]) throws Exception{

//Creating a KeyGenerator object

KeyGenerator keyGen = KeyGenerator.getInstance("DES");

//Creating a SecureRandom object

SecureRandom secRandom = new SecureRandom();

//Initializing the KeyGenerator

keyGen.init(secRandom);

//Creating/Generating a key

Key key = keyGen.generateKey();

System.out.println(key);

Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");

cipher.init(cipher.ENCRYPT_MODE, key);

String msg = new String("Hi how are you");

byte[] bytes = cipher.doFinal(msg.getBytes());

System.out.println(bytes);

}

}