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Dynamic access to Java classes from Python (ctypes/cffi-based PyJNIus)

Project description

Currently only as placeholder (because a base package jtypes.jvm is still in development)


Dynamic access to Java classes from Python.


jtypes.pyjnius is a bridge between Python and Java, allowing these to intercommunicate.
It is an effort to allow python programs full access to Java class libraries.

PyPI record.

jtypes.pyjnius is a lightweight Python package, based on the ctypes or cffi library.
It is an almost fully compliant implementation of Kivy Team’s PyJNIus package by reimplementing whole its functionality in a clean Python instead of Cython.

About PyJNIus:

Borrowed from the original website:

PyJNIus is a Python library for accessing Java classes.

A minimal PyJNIus example looks something like this:

Quick overview

>>> from jnius import autoclass
>>> System = autoclass('java.lang.System')
>>> System.out.println('Hello world')
Hello world

>>> Stack = autoclass('java.util.Stack')
>>> stack = Stack()
>>> stack.push('hello')
>>> stack.push('world')
>>> print(stack.pop())
>>> print(stack.pop())


  • Either the Sun/Oracle JRE/JDK or OpenJDK.



To install run:

python -m pip install --upgrade jtypes.pyjnius

To ensure everything is running correctly you can run the tests using:

python -m jt.jnius.tests


Visit development page

Installation from sources:

Clone the sources and run:

python -m pip install ./jtypes.pyjnius

or on development mode:

python -m pip install --editable ./jtypes.pyjnius


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

    python -m pip install tox


Copyright (c) 2014-2018 Adam Karpierz

Licensed under the MIT License
Please refer to the accompanying LICENSE file.



1.1.4b4 (2018-11-08)

  • Synchro with pyjnius master branch.
  • Update of the required setuptools version.
  • Minor setup and tests improvements.

1.1.4b0 (2018-10-26)

  • Synchro with pyjnius master branch.

1.1.2b4 (2018-05-23)

  • Bug fixes in jnius_config.
  • Synchro with pyjnius master branch.

1.1.2b3 (2018-05-22)

  • Update of the required setuptools version.

1.1.2b2 (2018-02-26)

  • Improvement and simplification of setup and packaging.

1.1.2b1 (2018-01-29)

  • Development moved to github.
  • General improvements and update.

1.1.2a0 (2017-04-01)

  • Development version.

1.1.0b2 (2017-01-21)

  • Documentation update.

1.1.0b1 (2017-01-01)

  • First beta release.

1.1.0a1 (2014-11-30)

  • Initial version.

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