Jess just uses java.lang.Class.forName() to find the Class object for
the (new) function, so if you can compile and run a Java program which
uses Java and works with this CLASSPATH, then Jess will work too. So,
can you compile and run this?
public class TestClass {
public void foo() {
new jade.core.AID();
}
}
I think Sven Schwarz wrote:
> Hello!
>
> I'm using Jess 6.0a6 and have problems accessing Java objects from
> within Jess. To be more precise: Creating JDK objects like e.g.
> java.util.Vector is no problem (see code snippet below), but whenever
> I try to create a new ACLMessage or something not includes in the JDK,
> Jess answers me with a "class unknown" exception.
>
> I've set the CLASSPATH env. variable and startet the Java virtual machine
> for Jess with the respective -cp / -classpath parameter, but Jess simply
> responds with a class-unknown-exception.
>
> The last attempt was to use some (import ...) statements, but that was of
> no use either. What are these statements good for, by the way?
>
Same as in Java; saves you some typing, that's all.
>
> Hopefully one of you can help me. Have a nice day!
>
> Sven
>
>
> --- O.K., here comes the protocol: ---------------------------------------------
>
> REM The following line is just an echo of the CLASSPATH env. variable
> CLASSPATH=.;C:\java\SiLRI1.2\IE;C:\java\SiLRI1.2\jars\gnu-regexp-1.0.8.jar;C:\ja
> va\SiLRI1.2\jars\rdf-api-1999-12-18.jar;C:\java\JavaCC\classes;C:\java\jade\lib\
> Base64.jar;C:\java\jade\lib\iiop.jar;C:\java\jade\lib\jade.jar;C:\java\jade\lib\
> jadeTools.jar;C:\java\jade-010517\jade\src;C:\java\Jess\jess.jar;C:\java\wwf\cla
> sses;C:\java\wwf-steffen\classes
>
> Jess, the Java Expert System Shell
> Copyright (C) 1998 E.J. Friedman Hill and the Sandia Corporation
> Jess Version 6.0a6 5/3/2001
>
> This copy of Jess will expire in 3 day(s).
>
>
> Jess> (bind ?v (new java.util.Vector))
>
> <External-Address:java.util.Vector>
>
>
> Jess> (bind ?m (new jade.core.AID))
>
> Jess reported an error in routine new
> while executing (new jade.core.AID)
> while executing (bind ?m (new jade.core.AID)).
> Message: Class not found.
> Program text: ( bind ?m ( new jade.core.AID ) ) at line 2.
> Nested exception is:
> jade.core.AID
> java.lang.ClassNotFoundException: jade.core.AID
> at java.net.URLClassLoader$1.run(Unknown Source)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(Unknown Source)
> at java.lang.ClassLoader.loadClass(Unknown Source)
> at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
> at java.lang.ClassLoader.loadClass(Unknown Source)
> at java.lang.ClassLoader.loadClassInternal(Unknown Source)
> at java.lang.Class.forName0(Native Method)
> at java.lang.Class.forName(Unknown Source)
> at jess.Rete.if(Unknown Source)
> at jess.cp.call(Unknown Source)
> at jess.d2.a(Unknown Source)
> at jess.Funcall.execute(Unknown Source)
> at jess.FuncallValue.resolveValue(Unknown Source)
> at jess.ck.call(Unknown Source)
> at jess.d2.a(Unknown Source)
> at jess.Funcall.execute(Unknown Source)
> at jess.Jesp.a(Unknown Source)
> at jess.Jesp.char(Unknown Source)
> at jess.Jesp.parse(Unknown Source)
> at jess.Main.execute(Unknown Source)
> at jess.Main.main(Unknown Source)
>
>
> Jess> (bind ?msg (new jade.lang.acl.ACLMessage))
>
> Jess reported an error in routine new
> while executing (new jade.lang.acl.ACLMessage)
> while executing (bind ?msg (new jade.lang.acl.ACLMessage)).
> Message: Class not found.
> Program text: ( bind ?msg ( new jade.lang.acl.ACLMessage ) ) at line 3.
> Nested exception is:
> jade.lang.acl.ACLMessage
> java.lang.ClassNotFoundException: jade.lang.acl.ACLMessage
> at java.net.URLClassLoader$1.run(Unknown Source)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(Unknown Source)
> at java.lang.ClassLoader.loadClass(Unknown Source)
> at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
> at java.lang.ClassLoader.loadClass(Unknown Source)
> at java.lang.ClassLoader.loadClassInternal(Unknown Source)
> at java.lang.Class.forName0(Native Method)
> at java.lang.Class.forName(Unknown Source)
> at jess.Rete.if(Unknown Source)
> at jess.cp.call(Unknown Source)
> at jess.d2.a(Unknown Source)
> at jess.Funcall.execute(Unknown Source)
> at jess.FuncallValue.resolveValue(Unknown Source)
> at jess.ck.call(Unknown Source)
> at jess.d2.a(Unknown Source)
> at jess.Funcall.execute(Unknown Source)
> at jess.Jesp.a(Unknown Source)
> at jess.Jesp.char(Unknown Source)
> at jess.Jesp.parse(Unknown Source)
> at jess.Main.execute(Unknown Source)
> at jess.Main.main(Unknown Source)
>
> ________________________________________________________________
> Sven Schwarz Tel. : +49 (631) 205 3451
> Email : [EMAIL PROTECTED]
> WWW : http://www.dfki.uni-kl.de/~schwarz/
> ________________________________________________________________
>
> ---------------------------------------------------------------------
> To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]'
> in the BODY of a message to [EMAIL PROTECTED], NOT to the
> list (use your own address!) List problems? Notify [EMAIL PROTECTED]
> ---------------------------------------------------------------------
>
---------------------------------------------------------
Ernest Friedman-Hill
Distributed Systems Research Phone: (925) 294-2154
Sandia National Labs FAX: (925) 294-2234
Org. 8920, MS 9012 [EMAIL PROTECTED]
PO Box 969 http://herzberg.ca.sandia.gov
Livermore, CA 94550
---------------------------------------------------------------------
To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]'
in the BODY of a message to [EMAIL PROTECTED], NOT to the
list (use your own address!) List problems? Notify [EMAIL PROTECTED]
---------------------------------------------------------------------
