Thanks everyone for your help! I finally got it up and running, and it worked splendidly. You may be interested in knowing, Kent, that the returned PyObject is not in fact a PyInt - I worked around this by calling toString on it and then using Integer.parseInt. I'm sure there's a better way, but it worked fine. Again, thanks much!

Jake

On 3/25/06, Jeff Emanuel < jemanuel@frii.com> wrote:
jython.jar must be in your compile classpath.

Jake Eakle wrote:
> Thanks! The code is all set up now, but I am still having a bit of a problem
> - it can't find org.python.core or org.python.util.PythonInterpreter. I'm
> compiling using javac in a Mac OS X terminal, and both the java files and
> the jythonRelease_2_2alpha1 folder are both in the home directory. I tried
> compiling the example you pointed me to, from its default position in the
> Jython file heirarchy, and it gave the same errors. I installed Jython
> fully, etc. and I'm not sure how to proceed. Help would be much appreciated.
>
>
>
> On 3/24/06, Kent Johnson <kent37@tds.net> wrote:
>
>>Jake Eakle wrote:
>>
>>>Hi all,
>>>I know nothing whatsoever about Python. I just downloaded Jython oin the
>>>recommendation of someone in some forum responding to a question about
>>>how to evaluate strings from Java - it turns out that the standaard
>>>libraries provide no real way to do this.
>>>
>>>I have a very simple situation - I have a string with a basic
>>>mathmatical expression, like  "3+45*2" and I want to store it's value in
>>>an int from a Java program.
>>
>>This example shows how to do what you want:
>>http://www.jython.org/docs/embedding.html
>>
>>I'm not sure but I think the returned PyObject will actually be a
>>PyInteger and you can call getValue() on it to get the result.
>>
>>You should know that eval() is a security hole that leaves you open to
>>denial-of-service attacks and probably data loss. Don't eval() strings
>>from an untrusted source.
>>
>>Kent
>>
>>
>>
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>
>