Exception when using Cipher

I have this code

KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");

keyGen.initialize(1024);

KeyPair keyPair = keyGen.genKeyPair();

PrivateKey priv = keyPair.getPrivate();

PublicKey pub = keyPair.getPublic();

SecretKeySpec skeySpecc = new SecretKeySpec(pub.getEncoded(), "AES");

Cipher cipher = Cipher.getInstance("AES");

cipher.init(Cipher.ENCRYPT_MODE, skeySpecc);

byte[] encrypted = cipher.doFinal(plain.getBytes());

When i run it i have this exception

java.security.InvalidKeyException: Invalid AES key length: 1296

Any one have any idea?

Best Regards

[653 byte] By [eng.aymana] at [2007-11-27 4:52:32]