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Python-Java bridge (ctypes/cffi-based PyJava)

Project Description

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


A Python to Java bridge


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

jtypes.pyjava is a lightweight Python Java package, based on the ctypes FFI library.
It is an almost fully compliant implementation of Remi Rampin’s PyJava package by reimplementing whole it’s functionality in a clean Python instead of C/C++.

About PyJava:

Note from the original website:

PyJava – A Python to Java bridge


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.


pip install --upgrade jtypes.pyjava

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

python -m jt.pyjava.tests



Copyright (c) 2015-2017 Adam Karpierz

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



0.2.9 (2016-09-24)

  • First alpha release.

0.1.1 (2015-10-05)

  • Initial version.
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