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Google core libraries for Java
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kstanger and ronshapiro Use J2ObjC's @RetainedWith annotation instead of @weak on
ImmutableMap.entrySet() to prevent crashes on iOS.

TESTED=Created a map inside an autorelease pool and saved a reference to the
entry set. Checked that the entry set functions correctly outside the
autorelease pool. Checked that both the entry set and the are deallocated by the
autorelease pool when not holding a strong reference to the entry set. Did this
test with the following constructions to cover all entry set implementations:
- ImmutableMap.of(<2 entries>)
- ImmutableMap.copyOf(<EnumMap with 2 entries>)
- ImmutableSortedMap.of(<2 entries>)
- ImmutableBiMap.of(<2 entries>).inverse()

RELNOTES=J2ObjC: Fixes crashes from use of ImmutableMap.entrySet().

Created by MOE:
Latest commit 74fc49f Mar 7, 2019
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android Use J2ObjC's @RetainedWith annotation instead of @weak on Mar 8, 2019
futures Document the retention of listeners added to Guava implementations of… Feb 26, 2019
guava-bom Create a Guava BOM. Nov 20, 2018
guava-gwt Internal GWT change. Mar 7, 2019
guava-testlib Suppress error for bad implementations of Comparable Mar 7, 2019
guava-tests Optimize ImmutableSet's hash flooding detection, using an algorithm w… Mar 7, 2019
guava Use J2ObjC's @RetainedWith annotation instead of @weak on Mar 8, 2019
refactorings Open source refactorings directory. This is knowingly very simple, wi… Mar 28, 2018
util Actually export Nov 2, 2017
.gitattributes Add a .gitattributes file to control line ending normalization, which… Nov 4, 2014
.gitignore Add .DS_Store to .gitignore. Mar 30, 2016
.travis.yml Fix a URL. Mar 7, 2019
CONTRIBUTORS fix indentation Apr 14, 2011
COPYING fix indentation Apr 14, 2011 Prepare for release 27.1. Mar 7, 2019
cycle_whitelist.txt Fix nonpublic identifiers and documentation that use "whitelist" or "… Jun 12, 2018
javadoc-stylesheet.css Fix a couple of issues with JDK7 javadoc style by using a slightly cu… Jul 17, 2013
pom.xml Fix Javadoc breakage under JDK11 canary. Feb 26, 2019

Guava: Google Core Libraries for Java

Latest release Build Status

Guava is a set of core libraries that includes new collection types (such as multimap and multiset), immutable collections, a graph library, functional types, an in-memory cache, and APIs/utilities for concurrency, I/O, hashing, primitives, reflection, string processing, and much 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.

Adding Guava to your build

Guava's Maven group ID is and its artifact ID is guava. Guava provides two different "flavors": one for use on a (Java 8+) JRE and one for use on Android or Java 7 or by any library that wants to be compatible with either of those. These flavors are specified in the Maven version field as either 27.1-jre or 27.1-android. For more about depending on Guava, see using Guava in your build.

To add a dependency on Guava using Maven, use the following:

  <!-- or, for Android: -->

To add a dependency using Gradle:

dependencies {
  compile ''
  // or, for Android:
  api ''


Snapshots of Guava built from the master branch are available through Maven using version HEAD-jre-SNAPSHOT, or HEAD-android-SNAPSHOT for the Android flavor.

  • Snapshot API Docs: guava
  • Snapshot API Diffs: guava

Learn about Guava



  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. If your code is a library, we strongly recommend using the Guava Beta Checker to ensure that you do not use any @Beta APIs!

  2. APIs without @Beta will remain binary-compatible for the indefinite future. (Previously, we sometimes removed such APIs after a deprecation period. The last release to remove non-@Beta APIs was Guava 21.0.) Even @Deprecated APIs will remain (again, unless they are @Beta). We have no plans to start removing things again, but officially, we're leaving our options open in case of surprises (like, say, a serious security problem).

  3. Guava has one dependency that is needed at runtime:

  4. 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.

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

  6. For the mainline flavor, we unit-test the libraries using only OpenJDK 1.8 on Linux. Some features, especially in, may not work correctly in other environments. For the Android flavor, our unit tests run on API level 15 (Ice Cream Sandwich).

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