[...]
try (KafkaProducerString,<Payment> producer = new KafkaProducer<String, Payment>(props)) {

  for (long i =**0; i <**10; i++) {
    final String orderId = "id" + Long.toString(i);
    final Payment payment = new Payment(orderId,**1000.00d);
    final ProducerRecord<String, Payment> record =
      new ProducerRecord<String, Payment>("transactions",
                              payment.getId().toString(),
                                                payment);
    producer.send(record);
  }
} catch (final InterruptedException e) {
    e.printStackTrace();
}
[...]