For more information on Actor4j, see the following more complete documentation on actor4j.io.
Most of the Actor4j - Core library (v2.x) has no external dependencies (except runtime-extended) and is also compilable as a native image with GraalVM. The minimum requirement is currently Java 21. Within the branch java-8, you find an older Java 8 version. ActorMessage is encapsulated as a Java Record. The Actor4j - Core library is now separated into sdk and runtime to provide more runtimes. A specification exists for the core part of Actor4j (default runtime).
The current version is 2.4, and it is still under further development. In the future, new versions and other libraries will be available as a Maven dependency. The entire documentation is now related to version 2.4.x. Please note that the documentation is currently incomplete and does not yet fully reflect all the features implemented.
Currently, you can add the following Maven dependencies to your pom.xml file (using the default runtime):
<dependency>
<groupId>io.actor4j</groupId>
<artifactId>actor4j-core-sdk</artifactId>
<version><!-- REPLACE WITH LATEST RELEASE --></version>
</dependency>
<!-- DEFAULT RUNTIME -->
<dependency>
<groupId>io.actor4j</groupId>
<artifactId>actor4j-core-runtime</artifactId>
<version><!-- REPLACE WITH LATEST RELEASE --></version>
</dependency>or a SNAPSHOT with JitPack.io:
<repositories>
<repository>
<id>jitpack.io</id>
<url>https://jitpack.io</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>io.actor4j</groupId>
<artifactId>actor4j-core</artifactId>
<version>master-SNAPSHOT</version>
</dependency>
</dependencies>Last updated: June 10, 2025