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From: Mike Stark <michael.e.stark@gsfc.nasa.gov>
Subject: Re: Ada to byte-code compiler works as advertised
Date: 1996/09/28
Message-ID: <324D483A.749C@gsfc.nasa.gov>#1/1
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references: <324BF60E.4DEF@gsfc.nasa.gov> <52jrt6$frj@map.mda.ca>
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organization: NASA Goddard Space Flight Center -- Greenbelt, Maryland USA
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newsgroups: comp.lang.java.advocacy,comp.lang.ada
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Date: 1996-09-28T00:00:00+00:00
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Ray Blaak wrote:
> 
> Mike Stark <michael.e.stark@gsfc.nasa.gov> writes:
> 
> >1.  Have a Java applet call Ada code.  The application we have been
> >working with is to draw a satellite ground track over a world map.  The
> >graphics is coded in Java, and the computation of latitude and longitude
> >are computed in Ada.
> 
> Would it have been difficult to write the graphics in Ada as well? I have no
> idea what the Ada interface to the Java graphics API is like.
> 
> Cheers,
> Ray Blaak
> blaak@mda.ca
Ray --

I don't believe it would be difficult, but I haven't done this.  
Intermetrics has produced an Ada package interfaces to all the 
classes in the AWT libraries (as well as all the other libraries).
In fact, I believe it would be easier (if you are already Ada literate,
that is) to stick with writing Ada code and to reference the Ada 
interfaces to the Java classes.  One reason we looked at Java calling
Ada is we have a lot of C/C++ types who want to look at Java and to 
produce a sample applet as a learning experience.  Being able to link
in the Ada code to compute longitudes and latitudes was a convenience
to people who wanted to concentrate on drawing the ground track on top
of a map.

Well, that's a long-winded answer.  The short version is that it 
should be easy to write the graphics in Ada, but since I haven't done
it personally I don't want to make a lot of wild claims.

Mike