Using Python from within Java [duplicate]

Answer 1

Simply run the Python interpreter as a subprocess from within Java.

Write your Python functionality as a proper script, which reads from stdin and writes to stdout.

Use the Java Runtime class to spawn a subprocess that runs your Python script. This is very simple to do and provides a very clean interface.

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Edit

import simplejson
import sys
for request in sys.stdin.readlines():
    args = simplejson.loads( request )
    result = myFunction( args['this'], args['that'] )
    sys.stdout.writeline( simplejson.dumps( result ) + "\n" )

The interface is simple, structured and very low overhead.