jgo: painless Java environments and execution

jgo in action

jgo launches Java applications directly from Maven coordinates—no installation required. Specify an artifact identifier and an optional main class, and jgo resolves dependencies, materializes the environment including the version of Java needed, and runs your program.

# Run Jython REPL -- no Java or Maven installation needed
jgo org.python:jython-standalone

# Run a specific version
jgo org.python:jython-standalone:2.7.3

Features

  • Zero-configuration execution: Automatic Java download and version management thanks to cjdk integration

  • Pure Python dependency resolver: No Maven installation required to resolve dependency graphs

  • Reproducible environments: jgo.toml project files with lock files (like package.json + package-lock.json)

  • Three-layer architecture: Independently useful layers for Maven resolution, environment building, and execution

  • Powerful Python API: Fine-grained control over dependency resolution and execution

  • Intelligent module handling: Full support of the Java module system (JPMS), including intelligent classification of dependencies on module-path or class-path as appropriate

Documentation

User Guide

Topics

Reference