You can add below code to get the correct TOTP

GoogleAuthenticator gAuth = new GoogleAuthenticator();
int totp = gAuth.getTotpPassword(secretKey);

and below dependency from https://github.com/wstrange/GoogleAuth

<dependency>
	<groupId>com.warrenstrange</groupId>
	<artifactId>googleauth</artifactId>
	<version>1.4.0</version>
</dependency>