Multi-catch/final rethrow

[Ulf Zibis]

No answer for my questions?  :-(

-Ulf


Am 04.05.2010 11:30, schrieb Ulf Zibis:
> Am 04.05.2010 02:25, schrieb joe.darcy at oracle.com:
>    
>> Greetings,
>>
>> As alluded to as a possibility previously [1], I'm happy to announce
>> that improved exception handling with multi-catch and final rethrow will
>> be part of an upcoming JDK 7 build.
>>
>>      
> Great!
>
>    
>>             } else {
>>                 throw (Throwable)new Exception();
>>
>>      
> I'm wondering that a cast to a throw is valid syntax, or _in other
> words_, what should such a syntax be good for ???
> In fact, an Exception instance is thrown, and should be caught by catch
> (Exception e). Or not ?
>
>
>    
>> To address this, the third clause is changed to
>>
>>
>>      
>>> - is a subtype/supertype of one of the types in the declaration of the
>>> catch  parameter
>>>
>>>        
> Does that mean, that following variation wouldn't rethrow
> Exception("b3") (and (Throwable)new Exception() too?),
> as it is nor subtype nor supertype of Exception, as it is itself ?
> That IMO would be weird syntax.
>
> class Neg04 {
>       static class A extends Exception {}
>       static class B extends Exception {}
>
>       void test(boolean b1, boolean b2, boolean b3) throws B {
>           try {
>               if (b1) {
>                   throw new A();
>               } else if (b2) {
>                   throw new B();
>               } else if (b3) {
>                   throw new Exception("b3");
>               } else {
>                   throw (Throwable)new Exception();
>               }
>           }
>           catch (A e) {}
>           catch (final Exception e) {
>               throw e;
>           }
>           catch (Throwable t) {}
>       }
> }
>
>
> -Ulf
>
>
>
>
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