Java

[Daniel J. Blezek, Ph.D.]

David, and Randy (and other interested parties),

  Thanks for the help, I figured out how to get the Java stuff to compile
out of the box, but had a question/request.  Currently in user.make you
must specify where you want the *.class files to go (i.e. the
JAVA_CLASS_HOME variable). Since class files are like ".o"'s shouldn't we
educate the makefile as to where to put them? I suggest vtk/java/classes.  
This could me made part of the build process by default, removing the need
to create a hard path in user.make.

  Suggestions?

  The mis-feature in removing threads when compiling with Java was
actually a necessity.  In previous (<1.2.2) versions of Java, JDK used is
own "green-threads" which weren't compatable with pthreads.  So pthreads
lost out when using Java.  The configur.in file was changed in Aug 97, and
the situation has changed, at least in the latest JDK that I got from Sun.  
If we can decide that pthreads and Java play well for everyone who is
using them, we could add the changes back in.  FYI, works fine under Linux
with JDK 1.2.2 & pthreads, but we need a suite of tests for the Java
bindings.


Thanks,
-dan



  


On Tue, 28 Mar 2000, David Gobbi wrote:

> Hi Dan,
> 
> I have vtk/Java building cleanly on my Linux machine at home.
> The user.make has to be set up properly (of course) and some
> environment variables i.e. CLASSPATH have to be set.  I think
> the CLASSPATH is why your build is failing.
> 
> Also, configure.in has a 'mis-feature' which disables threading
> when you configure --with-java.  On both Linux and IRIX I had
> to edit configure.in to remove this 'feature'.  I'm not sure
> whether --with-threads and --with-java really are compatible 
> under solaris so I haven't committed my changes.
> 
>   - David
> 
> --
>   David Gobbi, MSc                    dgobbi at irus.rri.on.ca
>   Advanced Imaging Research Group
>   Robarts Research Institute, University of Western Ontario
> 
> On Tue, 28 Mar 2000, Daniel J. Blezek, Ph.D. wrote:
> 
> > Hi all,
> > 
> >   Does anyone have any experience building the Java bindings
> > "out-of-the-tarball" using ./configure; make;  I'm trying to build Java
> > rpms for the 3.1 release and have had NO luck getting things built easily.
> > I run into this error:
> > 
> > make[1]: Entering directory `/localhome/blezek/vtk-linux/common'
> > /usr/local/jdk1.2.2/bin/javac -d /localhome/blezek/vtk-linux/java/vtk
> > -classpath /localhome/blezek/vtk-linux/java/vtk
> > ../java/vtk/vtkActor2D.java 
> > ../java/vtk/vtkActor2D.java:7: Superclass vtk.vtkProp of class
> > vtk.vtkActor2D not found.
> > public class vtkActor2D extends vtkProp
> >                                 ^
> > 1 error
> > make[1]: *** [../java/vtk/vtkActor2D.class] Error 1
> > 
> > 
> > Even though vtkProp.class exists in java/vtk.
> > 
> > Any suggestions?
> > -dan
> > 
> > P.S.  The success of the nightly RPM depends on being able to build
> > "hand's off"...
> > 
> > --
> > Daniel Blezek, Ph.D.
> > blezek at crd.ge.com
> > Computer Graphics and Systems Program
> > Electronic Systems Lab
> > GE Corporate Research & Development
> > 
> > --------------------------------------------------------------------
> > This is the private VTK discussion list. Please keep messages on-topic.
> > Check the FAQ at: <http://public.kitware.com/cgi-bin/vtkfaq>
> > To UNSUBSCRIBE, send message body containing "unsubscribe vtkusers" to
> > <majordomo at public.kitware.com>. For help, send message body containing
> > "info vtkusers" to the same address.
> > --------------------------------------------------------------------
> > 
> 

--
Daniel Blezek, Ph.D.
blezek at crd.ge.com
Computer Graphics and Systems Program
Electronic Systems Lab
GE Corporate Research & Development




--------------------------------------------------------------------
This is the private VTK discussion list. Please keep messages on-topic.
Check the FAQ at: <http://public.kitware.com/cgi-bin/vtkfaq>
To UNSUBSCRIBE, send message body containing "unsubscribe vtkusers" to
<majordomo at public.kitware.com>. For help, send message body containing
"info vtkusers" to the same address.
--------------------------------------------------------------------