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Page Summary

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Get started with the Google API Client Library for Java by exploring Google Cloud-specific samples.
Detailed setup instructions, including guidance for Maven users, explain the library's structure and components.
The library supports OAuth 2.0 for authentication and provides features for batching HTTP requests/responses and media upload/download.
Supported Java environments include Java 7+, Android 4.0+, and Google App Engine.
These open-source libraries welcome contributions.

Getting started

To get started with the Google API Client Library for Java, take a look at the Google Cloud-specific samples.

For information about the structure of the library and its multiple components, see the detailed setup instructions, which include instructions for Maven users.

To ask questions, report bugs, discuss the library, and read the announcements, see the Support page.

Authentication

The library supports the following authentication method:

OAuth 2.0

Batching

The library makes it easier to batch multiple HTTP requests/responses. For details, see the batch documentation.

Media upload/download

The library has convenient classes that help with media upload and media download.

Supported Java environments

The library supports the following Java environments:

Java 7 (or higher)
Android 4.0 (Ice Cream Sandwich) (or higher) (Note that this library's support for Android is @Beta.)
Google App Engine

Contribute

These are open-source libraries, and contributions are welcome.

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2026-07-16 UTC.

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