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Google APIs Client Library for Java

Written by Google, this library is a flexible, efficient, and powerful Java client library for accessing any HTTP-based API's on the web. It features a powerful and easy to use OAuth 2.0 and OAuth 1.0a library with a consistent interface. It's XML and JSON data models are light-weight, efficient, and support any data schema.

This is the recommended library project for accessing Google APIs. When accessing Google APIs based on the new API infrastructure, use the generated jars, which all depend on the core jars. You can use the core jars directly when working with older Google APIs or with non-Google APIs.

Supports these Java environments (details):

• Java 5 (or higher) standard (SE) and enterprise (EE)
• Android 1.5 (or higher) (details)
• Google App Engine (details)

Take a look at short Buzz and YouTube samples, as well as samples of Google APIs.

Take a look at the detailed setup instructions for the structure of the library and its multiple components. It also includes instructions for Maven users.

See the Support page to ask questions, report bugs, discuss the library, and read the announcements.