Re: [Jython-users] Using JNI together with jython

[<bc...@wo...>]

[Thomas Heller]

>I'm just trying to get up to speed with Jython: Very impressive!
>
>One problem though:
>
>I have a java JNI component which allows to set the color
>of the Console (I'm using win2000 here).
>This works fine from any java console program,
>but from jython (or even from the program compiled with
>jythonc) I get a traceback:
>
>C:\work\chip\debugger>jython
>Jython 2.0beta1 on java1.3.0 (JIT: null)
>Type "copyright", "credits" or "license" for more information.
>>>> from ColoredConsole import setColor
>>>> setColor(10)
>Traceback (innermost last):
>  File "<console>", line 1, in ?
>java.lang.IllegalAccessException
>...
>
>Is it possible to use native methods together with jython?

Generally yes. I have done so extensively in my JNI based "os" module
implementation. One advice which I remember, is to put your java class
into a package. 

[Quoting JimH from 25 Nov 1998:]
"""
> Does JNI work with jpython?  I've been fiddling with it but haven't
> gotten it to work.
I'm guessing that the entire problem here is related to using the
top-level unnamed package.  I've gone into some of the issues with this
before, so I won't reiterate them here.  The summary is that whenever
anything goes wrong with a top-level package, my first suggestion is to
move it into a real named package.
"""

Unfortunately I can't find the post where Jim goes over the issues.

regards,
finn