The Guava project contains several of Google's core libraries that we rely on in our Java-based projects: collections, caching, primitives support, concurrency libraries, common annotations, string processing, I/O, and so forth.

Requires JDK 1.6 or higher (as of 12.0).

• Our users' guide, GuavaExplained
• Browse API docs for the most recent release
• Browse API diffs for the most recent release
• Presentation slides focusing on base, primitives, and io
• Presentation slides focusing on cache
• Presentation slides focusing on util.concurrent
• A nice collection of other helpful links

• GitHub project
• Issue tracker: report a defect or feature request
• StackOverflow: Ask "how-to" and "why-didn't-it-work" questions
• guava-discuss: For open-ended questions and discussion

1. APIs marked with the @Beta annotation at the class or method level are subject to change. They can be modified in any way, or even removed, at any time. If your code is a library itself (i.e. it is used on the CLASSPATH of users outside your own control), you should not use beta APIs, unless you repackage them (e.g. using ProGuard).

2. Deprecated non-beta APIs will be removed two years after the release in which they are first deprecated. You must fix your references before this time. If you don't, any manner of breakage could result (you are not guaranteed a compilation error).

3. Serialized forms of ALL objects are subject to change unless noted otherwise. Do not persist these and assume they can be read by a future version of the library.

4. Our classes are not designed to protect against a malicious caller. You should not use them for communication between trusted and untrusted code.

5. We unit-test and benchmark the libraries using only OpenJDK 1.7 on Linux. Some features, especially in com.google.common.io, may not work correctly in other environments.