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description=Google core libraries for Java;

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guava guava guava is a set of core java libraries from google 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 it is widely used on most java projects within google and widely used by many other companies as well guava comes in two flavors the jre flavor requires jdk 1 8 or higher if you need support for 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 com google guava 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 by any library that wants to be compatible with android these flavors are specified in the maven version field as either 33 7 1 jre or 33 7 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 dependency groupid com google guava groupid artifactid guava artifactid version 33 7 1 jre version or for android version 33 7 1 android version dependency to add a dependency using gradle dependencies pick one 1 use guava in your implementation only implementation com google guava guava 33 7 1 jre 2 use guava types in your public api api com google guava guava 33 7 1 jre 3 android use guava in your implementation only implementation com google guava guava 33 7 1 android 4 android use guava types in your public api api com google guava guava 33 7 1 android for more information on when to use api and when to use implementation consult the gradle documentation on api and implementation separation snapshots and documentation snapshots of guava built from the master branch are available through maven using version 999 0 0 head jre snapshot or 999 0 0 head android snapshot for the android flavor snapshot api javadoc as well as snapshot api diffs are also available another easy way to get to the javadoc is to open guava dev api you can also jump right to a specific class by appending the class name to guava dev for example guava dev immutablelist learn about guava our users guide guava explained a nice collection of other helpful links links github project issue tracker report a defect or feature request stackoverflow ask how to and why didn t it work questions guava announce announcements of releases and upcoming significant changes guava discuss for open ended questions and discussion important warnings 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 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 guava has one dependency that is needed for linkage at runtime com google guava failureaccess 1 0 3 it also has some annotation only dependencies which we discuss in more detail at that link 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 our classes are not designed to protect against a malicious caller you should not use them for communication between trusted and untrusted code for the mainline flavor we test the libraries using a range of openjdk versions on linux and windows some features especially in com google common io may not work correctly in non linux environments for the android flavor our unit tests also run on api level 24 nougat guava 2026