The Right Approach to Exceptions

[deadalnix]

Le 19/02/2012 02:43, Ben Davis a écrit :
> On 19/02/2012 00:48, Jonathan M Davis wrote:
>> On Saturday, February 18, 2012 16:46:43 H. S. Teoh wrote:
>>> I can't believe something this simple has to be explained so
>>> elaborately. I thought all of us here knew how to use OO??
>>
>> I think that the problem stems from people frequently using exceptions
>> incorrectly, and many of the C++ programmers probably haven't _ever_
>> seen them
>> used correctly, since I don't think that it's very common for C++
>> programs to
>> define exception hierarchies - especially not advanced ones like Java
>> has. And
>> when you see a lot of bad exception code, that tends to turn you off
>> to them,
>> and it definitely doesn't show you how to use them correctly.
>>
>> - Jonathan M Davis
>
> I can assure you they get misused in Java too. Most people write this:
>
> try {
> lots and lots and lots of stuff here
> }
> catch (Exception e) {}
>

You raise 2 prblems of java exception system.

First, RuntimeException is a subclass of Exception. Second, you have to 
catch all Exceptions except RuntimeException and Error.

We can consider what is good in Java without keeping the bad part.