Merge pull request #42386 from dominicbetts/issue-fix-filename

Fix issue 9302

Author: PRMerger17

articles/iot-hub/quickstart-control-device-java.md

@@ -126,7 +126,7 @@ The back-end application connects to a service-side endpoint on your IoT Hub. Th
 
 1. In another terminal window, navigate to the root folder of the sample Java project. Then navigate to the **iot-hub\Quickstarts\back-end-application** folder.
 
-1. Open the **src/main/java/com/microsoft/docs/iothub/samples/ReadDeviceToCloudMessages.java** file in a text editor of your choice.
+1. Open the **src/main/java/com/microsoft/docs/iothub/samples/BackEndApplication.java** file in a text editor of your choice.
 
     Replace the value of the `iotHubConnectionString` variable with the service connection string you made a note of previously. Then save your changes to the **BackEndApplication.java** file.