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From: Mike Stark <michael.e.stark@gsfc.nasa.gov>
Subject: Re: Java vs Ada 95 (Was Re: Once again,
 Ada absent from DoD SBIR solicitation)
Date: 1996/10/16
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Date: 1996-10-16T00:00:00+00:00
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Robert Dewar wrote:
> 
> Mike Stark says
> 
> "used in specifying member functions).  Ada does not make the list of
> exceptions raised by a subprogram part of the signature, let alone
> requiring user-defined exceptions to be handled by the caller.  This
> alone is not a reason to say Java is better than Ada, but it is in-
> accurate to say that there are no features where Java has the advantage."
> 
> Yes, but of course this omission is quite deliberate in the Ada design. This
> is certainly something that is different in the two languages. Ada quite
> deliberately omitted this feature, because it potentially means that small
> changes to a single low level procedure can percolate up to affect specs
> all over the place!
> 
> Any place that Ada and Java differ, someone will prefer the way that Ada
> does it, and someone will prefer the way that Java did it. So you can't
> say that one language or the other does or does not have advantages. Too
> subjective!

I agree that this is a subjective judgement.  I think that it is a good
feature for designing safe and secure systems.  In Ada systems I've 
worked on, the exceptions raised were part of the commentary in a 
package spec, and that is quite workable.

Mike