Re: Primitive return value after exception in method
On 9/1/2013 3:23 AM, Marcel M?ller wrote:
On 01.09.13 08.30, Richard Maher wrote:
int fred = -1;
try {
fred = someMethod(String blah);
This is a syntax error.
fred = someMethod("blah");
I think Richard knows that but just messed up when typing in the
question.
} catch (e) {};
Now before someMethod raised an exception it had set the designated and
referenced RETURN value to say 1, what will the value of fred be?
If someMethod throws an exception it never returns normally and so fred
never gets assigned anything else but it's initial value -1.
Java does not pass any arguments or return values by reference. Although
the passed values might be references itself. But this makes no
difference here. Fred is never changed by the call to someMethod if
someMethod throws, regardless of its return type.
I don't even think that this (for the return value) is particular
Java specific.
It must be somewhere between "by definition" and "in practice always"
that variable = functioncall only assigns to variable after
functioncall is completed without exception for imperative
languages.
Arne
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