Thank you for your answers. Now i know where the mistake is.
The way you show, only works if the java-method is declared
'static'.
But in my example the java-method 'run' is non-static and
causes an error if i start it with the interpreter.

Is there a way to start non-static java-method with the interpreter?

Regards,
Kay


-----Urspr|ngliche Nachricht-----
Von: Jeff Emanuel [mailto:JEmanuel@[...].com]
Gesendet: Montag, 13. Oktober 2003 17:30
An: 'Kay '
Cc: 'jython-users@lists.sourceforge.net'
Betreff: RE: [Jython-users] call a java-method from embedded interpreter


In addition to what Diez said, you could change

> PyObject pyObject = interp.eval("obj1");
> pyObject.__getattr__("run").__call__(); <--- doesn't work?!

to

MyClass myObject = (MyClass)interp.get("obj1",MyClass.class);
myObject.run();




Hi,
>  interp = new PythonInterpreter();
>  interp.set("obj1", obj);
>  PyObject pyObject = interp.eval("obj1");
>  pyObject.__getattr__("run").__call__(); <--- doesn't work?!

Why so complicated? Why don't you just do

PyObject pyObject = interp.eval("obj1.run()");

Yielding null here, you could go for "exec" of course.

Or just

obj.run()

- as you don't do anything "pythonic" there :)

I'm not sure why you get your error, but my guess is that its similar to
what
you get when java reflection is used - you need pass the otherwise implicit
"this" argument explicitely. Use __call__(PyObject [] args), where the first
argument is supposed to be an instance of MyClass.

Diez




-----Original Message-----
From: Kay
To: jython-users@[...].net
Sent: 10/12/2003 5:58 PM
Subject: [Jython-users] call a java-method from embedded interpreter


Hello!

I want to start the method "run()" (with an embedded interpreter)
from 'MyClass.java', but i'm getting the following exception:

--> 
Traceback (innermost last):   (no code object) at line 0 TypeError:
run():
expected 1 args; got 0 <--

... dir() shows "obj1";
The InteractiveConsole starts 'run' without problems!
Do you know, where is the mistake?

Thx!

Regards,
Kay


-=>  App.java <=-
:

Object obj;
:
interp = new PythonInterpreter();
interp.set("obj1", obj);
PyObject pyObject = interp.eval("obj1");
pyObject.__getattr__("run").__call__(); <--- doesn't work?!

:



-=>  MyClass.java <=-

public class MyClass implements Runnable{

    public JFrame frame = new JFrame();


    public void run() {
      System.out.println("Starting...");
      frame.setSize(200,200);
      frame.show();
    }
}

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