https://github.com/vavr-io/vavr

vʌvr (formerly called Javaslang) is a non-commercial, non-profit object-functional library that runs with Java 8+. It aims to reduce the lines of code and increase code quality.
https://github.com/vavr-io/vavr

functional-programming hacktoberfest immutable-collections java javaslang object-functional persistent-collections

Last synced: 3 days ago
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vʌvr (formerly called Javaslang) is a non-commercial, non-profit object-functional library that runs with Java 8+. It aims to reduce the lines of code and increase code quality.

• Host: GitHub
• URL: https://github.com/vavr-io/vavr
• Owner: vavr-io
• License: apache-2.0
• Created: 2014-01-30T14:07:25.000Z (over 11 years ago)
• Default Branch: main
• Last Pushed: 2025-04-14T05:49:23.000Z (about 1 month ago)
• Last Synced: 2025-05-05T14:19:39.037Z (10 days ago)
• Topics: functional-programming, hacktoberfest, immutable-collections, java, javaslang, object-functional, persistent-collections
• Language: Java
• Homepage: https://vavr.io
• Size: 22.3 MB
• Stars: 5,896
• Watchers: 172
• Forks: 644
• Open Issues: 87
• Metadata Files:
  • Readme: README.md
  • Contributing: CONTRIBUTING.md
  • Funding: .github/FUNDING.yml
  • License: LICENSE
  • Codeowners: .github/CODEOWNERS

Awesome Lists containing this project

README

        
# Vavr

[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg?style=flat-square)](https://opensource.org/licenses/MIT)

[![GitHub Release](https://img.shields.io/github/release/vavr-io/vavr.svg?style=flat-square)](https://github.com/vavr-io/vavr/releases)

![Maven Central Version](https://img.shields.io/maven-central/v/io.vavr/vavr?versionPrefix=0)

[![Build Status](https://github.com/vavr-io/vavr/actions/workflows/ci.yml/badge.svg)](https://github.com/vavr-io/vavr/actions/workflows/ci.yml)

[![Code Coverage](https://codecov.io/gh/vavr-io/vavr/branch/master/graph/badge.svg)](https://codecov.io/gh/vavr-io/vavr)

```text

 ____  ______________  ________________________  __________

 \   \/   /      \   \/   /   __/   /      \   \/   /      \

  \______/___/\___\______/___/_____/___/\___\______/___/\___\

```

Vavr is an **object-functional extension for Java that reduces boilerplate code and enhances code quality.**

Vavr seamlessly combines object-oriented programming with the elegance and robustness of functional programming. 

It provides:

* persistent collections

* functional abstractions for error handling, concurrent programming

* pattern matching

* ...and more

Since **Vavr has no dependencies** beyond the JVM, you can easily add it as a standalone .jar to your classpath.

### Stargazers over time

[![Stargazers over time](https://starchart.cc/vavr-io/vavr.svg?variant=adaptive)](https://starchart.cc/vavr-io/vavr)

### Maven Dependency

    

        io.vavr

        vavr

        0.10.6

    

### Gradle Dependency

    implementation 'io.vavr:vavr:0.10.6'

## Using Vavr

See [User Guide](http://docs.vavr.io) and/or [Javadoc](http://www.javadoc.io/doc/io.vavr/vavr).

### Useful Maven Goals

* Executing tests: `mvn clean test`

* Executing doclint: `mvn javadoc:javadoc`

* Executing code coverage report: `mvn -P ci clean test jacoco:report`

* Create -javadoc.jar: `mvn javadoc:jar`

* Create -source.jar: `mvn source:jar`

### Contributing

Currently, there are two significant branches:

- `main` (represents a stream of work leading to the release of a new ma version)

- `version/1.x` (historical work that went into `1.0.0-alpha-3`, treat is as read-only - will be kept around for cherry-picking)

A small number of users have reported problems building Vavr. Read our [contribution guide](./CONTRIBUTING.md) for details.