Re: Evals from Java

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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