convert byte[] to AES key
<p>i have a AESkey which encrypted by a public key, and later decrypted by a private key</p>

<pre><code>    Cipher cipher = Cipher.getInstance("RSA");
    PrivateKey privateKey = keyPair.getPrivate();
    // decrypt the ciphertext using the private key 
    cipher.init(Cipher.DECRYPT_MODE, privateKey); 
    byte[] decryptedText = cipher.doFinal(theBytes); 
</code></pre>

<p>theBytes is a byte[] containing a encrypted AESkey, the question is how to convert the decryptedText back to the AESkey?</p>
