get secret and privatekey

[bigdogyea]

hi.i want use thiis lib to create a wallet,in example
SecureRandom random = new SecureRandom(); byte[] seedBytes = new byte[16]; random.nextBytes(seedBytes); Seed seed = new Seed(seedBytes); IKeyPair iKeyPair = seed.keyPair(); byte[] pub160Hash = iKeyPair.pub160Hash(); AccountID accountID = AccountID.fromBytes(pub160Hash);
then,how can get secret and privatekey?