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Re: Java, Graphics Output, MathCanvas

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  • Subject: [mg29416] Re: Java, Graphics Output, MathCanvas
  • From: "Torsten Hartwig" <torstenhartwig at>
  • Date: Mon, 18 Jun 2001 03:39:14 -0400 (EDT)
  • References: <9gh5jv$9cj$>
  • Sender: owner-wri-mathgroup at

Hello again,

the problem is solved. i thougt it is enough to save the jlink - directory
somewhere on the harddisc and create a link to its class-library.

But now i exactly followed the jlink installation guide and it works. I have
installed the Jlink-directory in Addons/Applications ! When I start my
program the second process called "mathematica" is shown in the taskbar.

sorry for my naivety :-)

thank you very much, torsten !

"Todd Gayley" <tgayley at> schrieb im Newsbeitrag
news:9gh5jv$9cj$1 at
> On Sat, 16 Jun 2001 06:54:37 +0000 (UTC), "Torsten Hartwig"
<torstenhartwig at> wrote:
> >Hi again,
> >
> >yes, the GraphicsApp example lauch normally, the MathKernel starts
> >but when i push the evaluate-button the MathCanvas stays cleared. I tried
> >something like D[3x^4,x] and marks TYPESET or Plot[x,{0,1,x}] and marks
> >GRAPHICS. But I gave my GraphicsApp example as a VisualCafe-Projekt to
> >friend an he tried out the programm...and it works.
> >
> >I really dont know what you mean with :
> >"Does the Mathematica front end launch along with the kernel when you
> >GraphicsApp (it should)?"
> >
> >I will search the manual for the front end and study it. I think if the
> >GraphicsApp example will work, my own Projekt will work,too.
> >
> >thanks a lot, torsten
> >
> Torsten,
> What I mean by "does the front end launch" is the following. When Java
> launches the Mathematica kernel, you will see it appear in the Windows
> taskbar. Programs like GraphicsApp that use the services of the
> Mathematica notebook front end need to launch the front end as well as
> the kernel. You should see another process called "Mathematica 4.1" (or
> something like that) show up in the taskbar. Thus my question is
> whether you see just one program (Mathematica kernel) appear in the
> taskbar, or two.
> My guess is that you don't see the front end launch, and I think I know
> why. J/Link must be properly installed for GraphicsApp to work.
> Specifically, the JLink.m file needs to be read into the kernel by the
> internals of J/Link, so it must be somewhere the kernel can find it.
> Make sure you have followed the J/Link installation instructions. There
> should be a JLink directory containing the file JLink.m (and several
> other subdirectories) in your <Mathematica dir>/AddOns/Applications
> directory.
> --Todd Gayley
> Wolfram Research

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