You can use this method to create the wallet faster:
try {
ECKeyPair ecKeyPair = Keys.createEcKeyPair();
BigInteger privateKeyInDec = ecKeyPair.getPrivateKey();
String sPrivatekeyInHex = privateKeyInDec.toString(16);
WalletFile aWallet = Wallet.createLight(UUID.randomUUID().toString(), ecKeyPair);
String sAddress = aWallet.getAddress();
} catch (CipherException e | InvalidAlgorithmParameterException e | NoSuchAlgorithmException e | NoSuchProviderException e) {
//
}