A Simple DES Encrypting/Decrypting Sample

public class TestCrypto {

    public static void main(String [] args) throws Exception{
        SecureRandom sr = new SecureRandom();
        KeyGenerator kg = KeyGenerator.getInstance("DES");
        kg.init(sr);

        SecretKey key = kg.generateKey();
        byte rawKeyData[] = key.getEncoded();

        System.out.println("Secret Key => " + Arrays.toString(rawKeyData));

        String str = "hello world";

        DESKeySpec dks = new DESKeySpec(rawKeyData);
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey key2 = keyFactory.generateSecret(dks);

        Cipher ci = Cipher.getInstance("DES");
        ci.init(Cipher.ENCRYPT_MODE, key, sr);
        byte data[] = str.getBytes();
        byte[] encryptedData = ci.doFinal(data);

        ci = Cipher.getInstance("DES");
        ci.init(Cipher.DECRYPT_MODE, key, sr);
        byte[] decryptedData = ci.doFinal(encryptedData);
        System.out.println("Decrypted => " + new String(decryptedData));

    }

}