Kevin,
That reminds me of some code I inherited:
if (file.exists()) {
try {
new FileInputStream(file)....
}
catch (FileNotFoundException e) {
//impossible since we checked the file before
}
}
Guess what? It wasn't impossible, it happened occasionally because of a
flaky shared drive. File systems are not under the program's control, so it
is unsafe to check-then-assume. Even worse, the above would not work for
files that only come into existence when opened, like nodes in /dev, /proc
or /mnt on some systems.
On Wed, Sep 22, 2010 at 12:03 AM, Kevin Wright <[email protected]>wrote:
> In what context?
>
> When opening a named file, it should be normal control flow to discover the
> name isn't valid.
> When performing subsequent operations on an already-opened handle, it's
> truly exceptional if the thing has since gone missing,
>
> combining the operations is just poor design
>
>
> 2010/9/21 Cédric Beust ♔ <[email protected]>
>
>>
>>
>> On Tue, Sep 21, 2010 at 3:47 PM, Kevin Wright
>> <[email protected]>wrote:
>>
>>> What would you propose as a good example?
>>>
>>
>> An example of a good checked exception?
>>
>> How about FileNotFoundException?
>>
>> --
>> Cédric
>>
>>
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>
>
>
> --
> Kevin Wright
>
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>
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