Guava is a set of core libraries that includes new collection types (such as multimap and multiset), immutable collections, a graph library, and utilities for concurrency, I/O, hashing, primitives, strings, and more!

Guava comes in two flavors.

• The JRE flavor requires JDK 1.8 or higher.
• If you need support for JDK 1.7 or Android, use the Android flavor. You can find the Android Guava source in the android directory.