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From Felix Knecht <fel...@apache.org>
Subject Re: Constructors & Exceptions
Date Thu, 03 Jan 2008 12:31:53 GMT
Emmanuel Lecharny schrieb:
> Hi guys,
>
> I'm facing an interesting question here : should constructors throw
> checked exceptions?
>
> I just feel like I don't like the idea at all, but may be I'm wrong...
>
> The problem is that for the new ServerEntry API, I have to guarantee
> that the constructors are called with valid parameters. There are many
> possible options :
> 1 -  use Assert in the constructors (but they will be disabled by
> default if you don't add the -ea in the JVM command line)
> 2 - use Checked Exception (but then the caller will have to
> try...catch the code
> 3 - use Runtime Exception
> 4 - don't do anything in the constructors, but handle the controls in
> setters
> 5 - just consider the user won't use the constructors with bad parameters
> 6 - default to a base object if inside the constructor, we have some
> exception
>
> This is not clear to me what should be the best solution. ATM, I
> incline to think that solution 3 is the less offending.

+1 for 3

|What about java.lang.IllegalArgumentException? It says precisely what's
the problem (and fits to your needs) and is a Subclass of RuntimeException?|

My 2 cents
Felix

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