The current version of Jython is 2.7.4. It can be applied:

• By downloading the Jython Installer. Use this to install Jython as an application locally. (Descriptive metadata here.)
• As a dependency in your build. Embed Jython in a Java application using the snippet provided for your preferred build tool.
• As the Jython Standalone JAR. Download this to run Jython without installing, or as a JAR on the class path of a Java application. Some users cite this as a dependency.

For information on installing see Installation.

This version is supported on Java 8 (minimum) and 11.

Previous versions of Jython are available from:

• Jython Installer Follow "Browse" to the JAR files.
• Jython as a dependency Select your version from the drop-down (from 2.7.2 only).
• Jython Standalone Follow "Browse" to the JAR files.

Release files for supported releases are signed by the following:

• Jeff Allen (2.7.2 onwards) (key id: 875C3EF9DC4638E3)
• Frank Wierzbicki (2.7.1 and earlier) (key id: 3979A71621665974)

You can validate these keys, using the installer as an example:

gpg --keyserver hkps://keyserver.ubuntu.com --recv-keys [key id]

gpg --verify jython-installer-[x.y.z].jar.asc \
    jython-installer-[x.y.z].jar

GPG will report Good signature from [release owner].

GPG may also report a warning unless you explicitly tell it to trust the key. This is not necessary for one-off verification. The warning is explained here. The signing keys are listed above to allow validation independent of the file repository.