# Google Cloud Endpoints & Java with Multiple Versions
This sample demonstrates how to use Google Cloud Endpoints using a Java backend
that supports multiple versions.

For more information, see the Google Cloud Endpoints documentation on
[Running multiple API versions](https://cloud.google.com/endpoints/docs/multiple-api-versions).

## Calling your API

Please refer to the Google Cloud Endpoints
[documentation](https://cloud.google.com/endpoints/docs/app-engine/) for App
Engine Flexible Environment to learn about creating an API Key and calling your
API.

## Viewing the Endpoints graphs

By using Endpoints, you get access to several metrics that are displayed
graphically in the Cloud Console.

To view the Endpoints graphs:

1. Go to the [Endpoints section in Cloud Console](https://console.cloud.google.com/endpoints)
   of the project you deployed your API to.
2. Click on your API to view more detailed information about the metrics
   collected.
