Oct 13
KeyStore keystore = KeyStore.getInstance("JKS");
Key key = keystore.getKey(alias, password);
// Get public key of certificate
Certificate cert = keystore.getCertificate(alias);
// Get public key
PublicKey publicKey = cert.getPublicKey();
// Create key pair
KeyPair keypair = new KeyPair(publicKey, (PrivateKey)key);