jvm 0.6.0b6

Python bridge for the Java Virtual Machine.

jvm

Python bridge for the Java Virtual Machine.

Overview

jvm is a bridge between Python and JVM, allowing these to intercommunicate.

It is an effort to allow Python programs full access to Java class libraries.

PyPI record.

Documentation.

jvm package is closely based on the jni Python package.

What is jvm:

jvm is an effort to allow Python programs full access to Java class libraries.

This is achieved not through re-implementing Python, as Jython has done, but rather through interfacing at the native level in both virtual machines.

Eventually, it should be possible to replace Java with python in many, though not all, situations. JSP, Servlets, RMI servers and IDE plugins are good candidates.

Once this integration is achieved, a second phase will be started to separate the Java logic from the Python logic, eventually allowing the bridging technology to be used in other environments, I.E. Ruby, Perl, COM, etc …

Known Bugs/Limitations :

• Java classes outside of a package (in the <default>) cannot be imported.

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

• Some methods rely on the “current” class/caller. Since calls coming directly from python code do not have a current class, these methods do not work. The User Manual lists all the known methods like that.

Installation

Prerequisites:

• Python 3.10 or higher

  • https://www.python.org/

  • Java 17 is a primary test environment.

• pip and setuptools

  • https://pypi.org/project/pip/

  • https://pypi.org/project/setuptools/

To install run:

python -m pip install --upgrade jvm

Development

Prerequisites:

• 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 https://github.com/karpierz/jvm.git jvm

and run:

python -m pip install ./jvm

or on development mode:

python -m pip install --editable ./jvm

License

Copyright (c) 2004-2025 Adam Karpierz

Licensed under CC BY-NC-ND 4.0

Licensed under proprietary License

Please refer to the accompanying LICENSE file.

Authors

• Adam Karpierz <[e-mail]>

Changelog

0.6.0b6 (2025-06-17)

• Add support for Python 3.14

• Add support for PyPy 3.11

• Drop support for Python 3.9 (due to compatibility issues).

• Drop support for PyPy 3.9

• Drop support for Oracle Java 1.8 (jdk, jre) due to licensing issues

  and the end of support from Oracle.

• Update readthedocs’s python to version 3.13

• Update tox’s base_python to version 3.13

• Added utilities: dll_path(), python_dll_path()

• pvm.h has been moved to jni (v.1.2.0b1) as pvm.c.

• Tox configuration is now in native (toml) format.

• Setup (dependencies) update.

0.6.0b5 (2024-11-08)

• Add support for Python 3.10, 3.11, 3.12 and 3.13

• Drop support for Python 3.7 and 3.8

• Add support for PyPy 3.9 and 3.10

• pvm.h has been included for further development.

• Tox configuration has been moved to pyproject.toml

• Setup update (now based on tox >= 4.0).

• Fix the bug in lib/classproperty.

• Fixes for bugs in JVMFinder’s.

• Copyright year update.

• Unittest have been performed for much more JVMs.

• Setup fixes.

• Setup (dependencies) update.

0.5.0b7 (2022-01-29)

• Drop support for Python 3.6

• Setup update.

0.5.0b5 (2021-10-16)

• dll_path argument of JVM() can also be type os.PathLike.

• Copyright year update.

• Setup update.

0.5.0b3 (2020-12-13)

• Add support for Python 3.9

• General update, improvements and cleanup.

• Setup update.

• Elimination of dependence on _testcapi.

0.4.0b3 (2020-03-08)

• Drop support for Python2

• Update of Mozilla Rhino.

• Update of license info.

• Setup update.

0.3.0b2 (2019-07-10)

• Last release for Python2

0.3.0b1 (2018-11-08)

• Bug fixes and improvements.

• Add Java 10 support.

• Update of the required setuptools version.

• Setup and tests improvements.

0.2.0b3 (2018-05-29)

• Bug fixes and improvements in Java 9 support.

• Improved support for Cygwin.

• Update of Mozilla Rhino.

• Update of the required setuptools version.

0.2.0b1 (2018-02-26)

• Improvement and simplification of setup and packaging.

0.1.1 (2005-10-05)

• Initial version.