Aims of this demo project

The resulting jar should start python code, that interacts with a java class and loads a 3rd party python library (nose)

Code

We have a Java class, FibSequenceCalc, which generates the Fibonacci sequence.

We put our python code as a library, "fibcalc", into Lib. The main() function lists as many Fibonacci numbers as the library nose has entries.

InitJython loads up jython in various ways.

Configuration

In the pom, we declare nose as a needed library in the configuration-section of the maven-jython-compile-plugin.

Try it out

run

  mvn package

which should give you the jar-with-dependencies.jar in the target folder. Run it with

  java -jar <filename>.jar <args> 

Without arguments, you will get a python console.

With "eval", you can evaluate your own code in the second argument.

With "run", you can run a custom python script.

With "script", the integration of python as a Java Scripting Engine is demonstrated.

To find out more, look at the source code.

Other ways

If a jython installation is already on the users computer, one might also call

  jython -jar my.jar

This executes the __run__.py code.