Chris Gray wrote:
On Thursday 06 July 2006 16:49, Geir Magnusson Jr wrote:
This is a great example. The last two aren't even legal exceptions for
that method.
It seems like the RI is doing random crap, and it wouldn't be something
that someone would depend on... can you imagine?
I think we have to distinguish between exceptions like these, which normally
nobody ever sees, unless they are actually writing tests for the core APIs
(or unless they make a major programming blunder - and then they'll fix that
and forget precisely what exception was thrown) on the one hand, and
exceptions which one can reasonably expect to happen sometimes when
developing code which may run in a variety of Java environments. An example
of the latter would be ClassNotFoundException indicating that the runtime
environment does not contain some wished-for class or package; if the
application programmer builds in a throw..catch clause which implements a
fallback, then you'd better theow ClassNotFoundException and not some random
thing like NoClassDefFoundError or NPE. Similarly, I just heard from a
customer that some application was failing because we were throwing
LinkageError when a shared library could not be found, whereas the
application only had a handler for UnsatisfiedLinkError. In this case both
the RI and the spec were in agreement, but I would happily have made the
change even if the spec had specified LinkageError and the RI was throwing
the subclass UnsatisfiedLinkError.
Fcourse it's not always easy to draw the line between exceptions which
probably represent a programmer error and those which robust programs may
need to handle, hance there will always be a need to discuss some of these
cases.
Thanks a lot, Chris.
We may frequently encounter this confused situation, and I suggest we
discuss the problems case by case if someone is not sure how to do. ;-)
For this case, I decide to follow "useRadix(int radix)". Please correct
me if I'm wrong. Thanks a lot.
Best regards,
Richard
Chris
ยต
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Richard Liang
China Software Development Lab, IBM
