Use for the gdata-java-client library.
Google gives different gdata services. With the use of different libraries we're able to access google data. This libraries are written in different languages. gdata-java-client library is one of them. With use of this library we're able to interact with google account data e.g.,add new event in our google calendar.
For more information:
- https://developers.google.com/gdata/articles/java_client_lib
- http://code.google.com/apis/gdata/client-java.html
- https://github.com/google/gdata-java-client
Above links gives idea about gdata-java-client and use of it.