jni documentation

jni

Python bridge for the Java Native Interface.

Overview

jni is a complete bridge between Python and Java JNI.
It is an effort to allow python programs full access to Java JNI API.

PyPI record.

Documentation.

jni is a lightweight Python package, based on the ctypes, or cffi library, or Cython wrapper (currently under development).
It is done by implementing whole JNI API functionality in a clean Python instead of C/C++.
jni also contains a JNI wrapper in pure C based on Python C-API (currently under development) - mainly for performance reasons.

What is jni:

jni is an effort to allow python programs full access to Java JNI API.
This is achieved not through re-implementing Python, as Jython has done, but rather through interfacing at the native level in both virtual machines.
Known Bugs/Limitations :

  • Because of lack of JVM support, you cannot shutdown the JVM and then restart it.

Requirements

  • ATTENTION: currently works and tested only for Windows.

Installation

Prerequisites:

To install run:

python -m pip install --upgrade jni

Development

Prerequisites:

  • Development is strictly based on nox. To install it run:

    python -m pip install --upgrade nox

Visit Development page.

Installation from sources:

clone the sources:

and run:

python -m pip install ./jni

or on development mode:

python -m pip install --editable ./jni

License

Copyright (c) 2004-2026 Adam Karpierz
Licensed under CC BY-NC-ND 4.0
Licensed under proprietary License
Please refer to the accompanying LICENSE file.

Authors

Sponsoring

If you would like to sponsor the development of this project, your contribution is greatly appreciated.
As I am now retired, any support helps me dedicate more time to maintaining and improving this work.

Donate

Contents

Indices and tables