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Vavr is an object-functional extension for Java that makes defensive programming easy by leveraging immutability and functional control structures

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.

Led and maintained by @pivovarit

<dependency>
    <groupId>io.vavr</groupId>
    <artifactId>vavr</artifactId>
    <version>0.10.7</version>
</dependency>

implementation 'io.vavr:vavr:0.10.7'

See User Guide and/or Javadoc.

• 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

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 for details.