Brave Search

Publish artifacts to PyPi. Source tarball and binary wheels for Python 3.6 - 3.10 for Linux, Mac, and Windows (x86_64). Publish release to Maven Central with group id org.jpyconsortium and artifact id jpy. Java-8 compatible jars.

      » pip install jpy

Published Nov 13, 2025

Version 1.3.0

Homepage https://github.com/jpy-consortium/jpy

GitHub

github.com › bcdev › jpy

GitHub - bcdev/jpy: A bi-directional Python-Java bridge used to embed Java in CPython or the other way round. · GitHub

August 5, 2021 - A bi-directional Python-Java bridge used to embed Java in CPython or the other way round. - bcdev/jpy

Starred by 188 users

Forked by 37 users

Languages C 54.6% | Java 25.9% | Python 18.7%

Readthedocs

jpy.readthedocs.io

Welcome to jpy’s documentation! — jpy 0.9.0 documentation

jpy is a bi-directional Java-Python bridge allowing you to call Java from Python and Python from Java.

Deephaven

deephaven.io › core › docs › how-to-guides › use-jpy

Use jpy | Deephaven

jpy is a bi-directional Java-Python bridge that facilitates calling Java from Python and vice versa. Python programs that use jpy can access Java functionalitie...

Readthedocs

jpy.readthedocs.io › en › latest › intro.html

Introduction — jpy 0.9.0 documentation

Java programs with jpy.jar on the classpath can import Python modules, access module attributes such as class types and variables, and call any callable objects such as module-level functions, class constructors, as well as static and instance class methods.

Readthedocs

jpy.readthedocs.io › en › latest › install.html

Installation — jpy 0.9.0 documentation

If you use the free Microsoft Visual C++ Express edition, then you only can build for a 32-bit Python. ... SET VS90COMNTOOLS=%VS100COMNTOOLS% SET JDK_HOME=<path to the JDK installation directory> SET JAVA_HOME=%JDK_HOME% SET PATH=%JDK_HOME%\jre\bin\server;%PATH% Then, to actually build and test the jpy Python module use the following command:

Anaconda

anaconda.org › terradue › jpy

Jpy | Anaconda.org

jpy is a bi-directional Python-Java bridge which you can use to embed Java code in Python programs or the other way round

GeoAPI

geoapi.org › java-python

GeoAPI Java-Python bridge | GeoAPI

May 5, 2025 - The GeoAPI Java ↔ Python bridge also requires JPY, a bi-directional bridge used to embed Java in CPython or the other way round. JPY has been designed particularly with regard to maximum data transfer speed between the two languages. This page explains how to build JPY locally.

Read the Docs

app.readthedocs.org › projects › jpy

jpy - Read the Docs

jpy is a *bi-directional* Java-Python bridge which you can use to embed Java code in …

Find elsewhere

Google Bing Mojeek

Talvi

talvi.net › posts › a-brief-overview-of-python-java-bridges-in-2020.html

A brief overview of Python-Java bridges in 2020 - talvi.net

January 10, 2020 - The Javadoc says that they should ... java.lang.UnsatisfiedLinkError due to an undefined symbol PyFloat_Type. ... JPype is a Python module to provide full access to Java from within Python....

GitHub

github.com › jpy-consortium › jpy

GitHub - jpy-consortium/jpy · GitHub

jpy is a bi-directional Python-Java bridge which you can use to embed Java code in Python programs or the other way round. It has been designed particularly with regard to maximum data transfer speed between the two languages.

Starred by 81 users

Forked by 20 users

Languages C 50.1% | Java 29.2% | Python 20.4% | Shell 0.3%

STEP Forum

forum.step.esa.int › development › python

Jpy Python-Java bridge version - python - STEP Forum

September 4, 2015 - I am trying to install the snappy Python binding on a MacBook Pro and the installer is looking for jpy.macosx-10.6-x86_64-2.7.zip, which is not contained in the distribution jar file. Can I use an alternate jpy file (com…

Readthedocs

jpy.readthedocs.io › en › latest › reference.html

Reference — jpy 0.9.0 documentation

This reference addresses the jpy Python module. ... Create the Java VM using the given options sequence of strings.

GitHub

github.com › bcdev › jpy › blob › master › src › main › java › org › jpy › PyObject.java

jpy/src/main/java/org/jpy/PyObject.java at master · bcdev/jpy

August 5, 2021 - A bi-directional Python-Java bridge used to embed Java in CPython or the other way round. - bcdev/jpy

Author bcdev

Readthedocs

jpy.readthedocs.io › en › latest › _static › java-apidocs › org › jpy › PyLib.html

PyLib (Java-Python Bridge 0.10.0 Java API)

Represents the library that provides the Python interpreter (CPython). When the PyLib class is loaded, it reads its configuration from a Java properties file called .jpy which must exist in the current user's home directory.

Deephaven

deephaven.io › core › docs › conceptual › python-java-boundary

The Python-Java boundary and how it affects query efficiency | Deephaven

Deephaven's Python API allows users to perform tasks by wrapping the Java operations in Python. This is accomplished via jpy, a bi-directional Python-Java bridge that can be used to embed Java code in Python programs.

reddit.com › r/java › best way to combine python and java?

r/java on Reddit: Best way to combine Python and Java?

October 29, 2022 -

My project uses some packages that are available only in Python and heavily rely on C libraries. The project also greatly benefits from Java libraries and the JVM. What's the optimal way to call Python functions from Java?

I tried:

Small web-services: overhead to serialize data, start and stop the services. Also debugging is harder and implementing each new function is now double the effort.
Jpy: a library that runs an interpreter in the JVM. Spare the service start/stop, but: isn't really feasible for more than a single-liner, data translation between Java and Python is cumbersome, and I also encountered runtime segmentation fault errors.

Any other options?

The project is in the machine-learning domain, so involves exchanging large numeric arrays and text. In some cases the execution switches back and forth between the platforms.