Question

If I put in the catch clause:

...
catch(Exception e)
{
    throw new Exception("msg", e); 
}

Am I throwing or re-throwing the e exception?

So is correct to say that the throw clause used
into a catch is re-throwing an exception while using it
into a try block or elsewhere is throwing an exception?

Ultimately when or where thow throw an exception and when or where re-throw an exception?

Thanks.

Answer 1

You throw an exception the first time.

throw new Exception();

You re-throw a caught exception

} catch (Exception e) {
   // do something
   throw e;
}

You wrap an exception by throwing a different exception which contains that exception.

} catch (Exception e) {
   // do something
   throw new Exception(e);
}