What is the best way to call Java code from Python?

Question

I have a Java class library (3rd party, proprietary) and I want my python script to call its functions. I already have java code that uses this library. What is the best way to achieve this?

Duplicate: http://stackoverflow.com/questions/438594/how-to-call-java-objects-and-functions-from-cpython, http://stackoverflow.com/questions/1201628/java-wrapper-to-perl-python-code — S.Lott, Dec 07 '09 at 01:08

score 15 · Accepted Answer · answered Dec 06 '09 at 12:55

15

Can you run your current Python scripts under Jython ? If so, that's probably the best way, since the Java library can be exposed directly into Jython as scriptable objects.

Failing that, there are a number of solutions listed here.

answered Dec 06 '09 at 12:55

Brian Agnew

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If using scipy and numpy, Jython may not be an option. – Sney Mar 05 '10 at 15:45

score 8 · Answer 2 · answered Dec 06 '09 at 13:19

8

The other answer is JPype, which allows CPython to talk to Java. It's useful if you can't switch to Jython.

answered Dec 06 '09 at 13:19

Jason Orendorff

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score 3 · Answer 3 · answered Dec 06 '09 at 21:22

There's also JCC which is not mentioned on the Caltech page.

Quote:

JCC is a C++ code generator that produces a C++ object interface wrapping a Java library via Java's Native Interface (JNI). JCC also generates C++ wrappers that conform to Python's C type system making the instances of Java classes directly available to a Python interpreter.

When generating Python wrappers, JCC produces a complete Python extension via the distutils or setuptools packages.

What is the best way to call Java code from Python?

3 Answers3