我如何从azure iot hub获取消息并将其保存为String以供以后用于使用java的gui应用程序

Question

我试图将这个类用于GUI应用程序，其中receiveDeviceToCloudMessage返回一个包含消息的字符串值，以便在我的gui代码中实现，我该怎么办呢？ 有没有办法可以将此代码转换为GUI应用程序？ 由于抱怨，我不得不删除catch块

public class AzureIotHub
{
   //The class variables
   static String deviceConnectionString = "connectionString";    
   static String message;
   public static EventHubClient receiveDeviceToCloudMessage(final String partitionId)
   {
      EventHubClient client = null;
      try
      {
         client = EventHubClient.createFromConnectionStringSync(deviceConnectionString);
      }

      try
      {
        client.createReceiver(EventHubClient.DEFAULT_CONSUMER_GROUP_NAME,partitionId, Instant.now()).thenAccept(receiver ->
                {
                    System.out.println("** Created receiver on partition " +partitionId);
                    try
                    {
                        while (true)
                        {   //While loop
                            Iterable<EventData> receivedEvents = receiver.receive(100).get();
                            int batchSize = 0;
                            if (receivedEvents != null)
                            {
                                System.out.println("Got some events");
                                for (EventData receivedEvent : receivedEvents)
                                {
                                    // used a String variable to save the message
                                    message = new String(receivedEvent.getBytes(), Charset.defaultCharset());                                       
                                    batchSize++;

                                }

                            }
                            System.out.println(String.format("Partition:%s,ReceivedBatch Size: %s", partitionId, batchSize));
                        }
                    }

                });
    }

    return client;
    }  
    public static void main(String[] args) throws IOException,NoSuchAlgorithmException
    {
    // Create receivers for partitions 0 and 1.
    EventHubClient client0 = receiveDeviceToCloudMessage("0");
    System.out.println("Press ENTER to exit.");
    try
    {
        System.in.read();
        System.out.println(message);
    }

    try
    {
        client0.closeSync();
        System.exit(0);
    }


    } 
    }