Re: Exception Handling

=?ISO-8859-1?Q?Arne_Vajh=F8j?= <>
Mon, 12 Mar 2012 14:49:33 -0400
On 3/11/2012 6:26 PM, Patricia Shanahan wrote:

On 3/11/2012 2:54 PM, Novice wrote:

Lew<> wrote in news:jjipli$np7$


It is common and frequently useful to create an application-specific
checked exception. Again, and I've said this many times, think about
what will be useful when troubleshooting a problem. Many times, a
custom exception is useful. It says that the underlying exception has
been caught, logged and wrapped.

But how is a custom FooException better than a good ol'
IllegalArgumentException? I'm not quite getting that yet.

Generally, you should use different Exception subclasses for cases that
may need different handling, so that callers can set up appropriate
catch blocks.

I think the word *may* is critical here.

It is not just if one need to write two different catch blocks
within the next 10 minutes.

It is actually if it is reasonable likely that someone will want
to write two different catch blocks within the next 10 or 20 years.


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