The Apache Commons Collections package contains types that extend and augment the Java Collections Framework.
Documentation
-------------
More information can be found on the [homepage](https://commons.apache.org/proper/commons-collections).
The [JavaDoc](https://commons.apache.org/proper/commons-collections/javadocs/api-release) can be browsed.
Questions related to the usage of Apache Commons Collections should be posted to the [user mailing list][ml].
Where can I get the latest release?
-----------------------------------
You can download source and binaries from our [download page](https://commons.apache.org/proper/commons-collections/download_collections.cgi).
Alternatively you can pull it from the central Maven repositories:
```xml
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-collections4</artifactId>
<version>4.0</version>
</dependency>
```
Contributing
------------
We accept PRs via github. The [developer mailing list][ml] is the main channel of communication for contributors.
There are some guidelines which will make applying PRs easier for us:
+ No tabs! Please use spaces for indentation.
+ Respect the code style.
+ Create minimal diffs - disable on save actions like reformat source code or organize imports. If you feel the source code should be reformatted create a separate PR for this change.
+ Provide JUnit tests for your changes and make sure your changes don't break any existing tests by running ```mvn clean test```.
If you plan to contribute on a regular basis, please consider filing a [contributor license agreement](https://www.apache.org/licenses/#clas).
You can learn more about contributing via GitHub in our [contribution guidelines](CONTRIBUTING.md).
License
-------
Code is under the [Apache Licence v2](https://www.apache.org/licenses/LICENSE-2.0.txt).
Donations
---------
You like Apache Commons Collections? Then [donate back to the ASF](https://www.apache.org/foundation/contributing.html) to support the development.
