Google OAuth Client Library for Java

Written by Google, this library is a powerful and easy to use Java client library for the OAuth 2 and OAuth 1.0a standards for authorization. It is built on the Google HTTP Client Library for Java.

Supports these Java environments:

• Java 5 (or higher) standard (SE) and enterprise (EE)
• Android 2.1 (or higher)
• Google App Engine

For access to Google APIs, please take a look at the Google API Client Library for Java.