@Scheduled(cron = "30 * * * * *")
public void runnable() {
  CronSequenceGenerator generator = new CronSequenceGenerator("* */1 * * * *");

  Date currentTime = new Date();
  final Date nextExecution = generator.next(currentTime);

  System.out.println("CurrentTime: " + currentTime + ". NextExecution:" + nextExecution.toString());
}

CurrentTime: Thu Mar 30 20:21:30 CEST 2017. NextExecution:Thu Mar 30 20:21:31 CEST 2017
CurrentTime: Thu Mar 30 20:22:30 CEST 2017. NextExecution:Thu Mar 30 20:22:31 CEST 2017
CurrentTime: Thu Mar 30 20:23:30 CEST 2017. NextExecution:Thu Mar 30 20:23:31 CEST 2017