Auto-download JDK or JRE and run Java apps from Python or CLI
cjdk (for "cached JDK") is a Python package and command-line tool to download and run JDK (Java Development Kit) or JRE (Java Runtime Environment) distributions.
Previously used JDKs are kept in the user's cache directory, so that future invocations do now require a download.
- Installing exact JDK versions for reproducible testing
- Working with multiple versions of JDKs
- Deploying tools that require Java
Using the command-line interface of cjdk, you can run Java programs using a
one-liner, without having to worry about whether the user has installed a new
enough Java runtime and set
PATH to appropriate values.
For example, the following command will run Checkstyle using Temurin JRE 17 (which will be downloaded if this is the first time it is requested):
cjdk --jdk=temurin-jre:11 exec java -jar checkstyle-10.3-all.jar -c style.xml MyApp.java
See the documentation for detailed usage.
cjdk requires Python 3.8.
pip install cjdk
cjdk is distributed under the MIT license. Please see LICENSE.txt.
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.