Skip to main content

A Python to Java bridge (ctypes/cffi-based PyJava).

Project description


A Python to Java bridge.


jtypes.pyjava is a bridge allowing to use Java classes in regular Python code.

PyPI record.


jtypes.pyjava is an almost fully compliant implementation of Remi Rampin’s PyJava package by reimplementing whole its functionality in a clean Python instead of C.
jtypes.pyjava package is closely based on the jvm and jni Python packages.

About PyJava:

Borrowed from the original website:

PyJava is a bridge allowing to use Java classes in regular Python code.
It is similar to JPype.

It is a C extension that uses JNI to access a Java virtual machine, meaning that it can be used anywhere Python is available. It is not a different interpreter like Jython and does not require anything, other than a JRE. The JVM dynamic library is load dynamically through pyjava.start() (some basic logic for locating this library on major platforms will be provided).

The integration with Java code is meant to be as complete as possible, allowing to use Java and Python objects seemlessly and converting objects back and forth when Java code is called. Furthermore, subclassing Java classes or interfaces in Python code to allow callback from Java is planned for the 0.2 version.

Please note that this extension is still at a very early stage of development and probably shouldn’t be used for anything.


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



To install run:

python -m pip install --upgrade jtypes.pyjava

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

python -m jt.pyjava.tests



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

    python -m pip install --upgrade tox

Visit development page.

Installation from sources:

clone the sources:

git clone jtypes.pyjava

and run:

python -m pip install ./jtypes.pyjava

or on development mode:

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


Copyright (c) 2015-2020 Adam Karpierz
Licensed under the MIT License
Please refer to the accompanying LICENSE file.



0.1.5b2 (2020-11-10)

  • Fix for exception handling in start(…).
  • Add support for Python 3.8 and 3.9.
  • Drop support for Python2.
  • General update, improvements and cleanup.
  • Setup update.

0.1.5a10 (2019-07-10)

  • Last release for Python2.

0.1.5a9 (2018-11-08)

  • Update of the required setuptools version.
  • Minor setup and tests improvements.

0.1.5a5 (2018-05-22)

  • Update of the required setuptools version.

0.1.5a4 (2018-02-26)

  • Improvement and simplification of setup and packaging.

0.1.5a3 (2018-01-29)

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

0.0.16a1 (2017-05-13)

0.0.15a2 (2017-01-03)

  • Next alpha releases.

0.0.10a1 (2016-09-24)

  • First alpha release.

0.0.1 (2015-10-05)

  • Initial version.

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Files for jtypes.pyjava, version 0.1.5b2
Filename, size File type Python version Upload date Hashes
Filename, size (66.7 kB) File type Source Python version None Upload date Hashes View

Supported by

AWS AWS Cloud computing Datadog Datadog Monitoring DigiCert DigiCert EV certificate Facebook / Instagram Facebook / Instagram PSF Sponsor Fastly Fastly CDN Google Google Object Storage and Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Salesforce Salesforce PSF Sponsor Sentry Sentry Error logging StatusPage StatusPage Status page