Removed byte array initialization from constructor.

aes-encryptor-with-parameters.java

    public AESEncryptor(byte[] sessionKey, byte[] iv) {
        try {
            encryptor = Cipher.getInstance("AES/CBC/PKCS5Padding");
            encryptor.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(sessionKey, "AES"), new IvParameterSpec(iv));
            decryptor = Cipher.getInstance("AES/CBC/PKCS5Padding");
            decryptor.init(Cipher.DECRYPT_MODE, new SecretKeySpec(sessionKey, "AES"), encryptor.getParameters());
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (InvalidAlgorithmParameterException e) {
            e.printStackTrace();
        }
    }