[Jython-users] jython problem on OS X

[justin w. <ju...@bi...>]

Hi,

I had jython working all fine on OS X, and now I've messed it up. I.  
It's quite simple - I create a class in java and try to load it in  
jython. Jython can see the class all right, but fails when I try and  
instantiate it. As I said, it was working before but then I changed  
some system settings, specifically the environment variables (PATH,  
PYTHONPATH) that the Terminal application gets initialised with. I've  
tried changing the settings back,  tried uninstalling / reinstalling  
Jython, but no luck. I've been using Jython for 2 years on all  
platforms and haven't seen anything like this before.

Thanks for any help

<< java class >>

package test;

public class FooBar{

     public void speak(){
         System.out.println("here i am!");
     }

}

<< jython script >>

[justin-worralls-Computer:~/java/fbl/2.99] justinworrall% jython
Jython 2.1 on java1.3.1 (JIT: null)
Type "copyright", "credits" or "license" for more information.
 >>> from test import *
 >>> dir()
['FooBar', '__doc__', '__name__']
 >>> x=FooBar()
Traceback (innermost last):
   File "<console>", line 1, in ?
java.lang.NullPointerException
         at java.lang.Class.isAssignableFrom(Native Method)
         at org.python.core.PyJavaClass.init__class__(PyJavaClass.java)
         at org.python.core.PyJavaClass.init(PyJavaClass.java)
         at org.python.core.PyJavaClass.initLazy(PyJavaClass.java)
         at org.python.core.PyJavaClass.initialize(PyJavaClass.java)
         at  
org.python.core.PyJavaClass.initConstructors(PyJavaClass.java)
         at org.python.core.PyJavaClass.__call__(PyJavaClass.java)
         at org.python.core.PyObject.__call__(PyObject.java)
         at org.python.pycode._pyx3.f$0(<console>:1)
         at org.python.pycode._pyx3.call_function(<console>)
         at org.python.core.PyTableCode.call(PyTableCode.java)
         at org.python.core.PyCode.call(PyCode.java)
         at org.python.core.Py.runCode(Py.java)
         at org.python.core.Py.exec(Py.java)
         at  
org.python.util.PythonInterpreter.exec(PythonInterpreter.java)
         at  
org.python.util.InteractiveInterpreter.runcode(InteractiveInterpreter.ja 
va)
         at  
org.python.util.InteractiveInterpreter.runsource(InteractiveInterpreter. 
java)
         at  
org.python.util.InteractiveInterpreter.runsource(InteractiveInterpreter. 
java)
         at  
org.python.util.InteractiveConsole.push(InteractiveConsole.java)
         at  
org.python.util.InteractiveConsole.interact(InteractiveConsole.java)
         at org.python.util.jython.main(jython.java)

java.lang.NullPointerException: java.lang.NullPointerException
 >>>