Yep, that did the trick.
Double zero = 0d;
Double test = null;
Double test2 = true?test:zero;
Works. Thanks Mike! You've saved me a lot of if-else-ing just now :-)
Ramsey
On Oct 19, 2009, at 11:37 AM, Mike Schrag wrote:
The two values on either side of the colon have to be of the same
type, so I suspect it's boxing the first one from Double down to
double (and NPEing) then boxing back up to Double at the end? I put
this in the "just don't do that" category. I personally don't like
boxing -- I think it's very misleading and leads to weird bugs like
this.
On Oct 19, 2009, at 11:31 AM, Ramsey Gurley wrote:
Hi all,
I've just discovered that while
Double test = true?null:0d; //result: test is null
works without error, the following
Double test2 = true?(new Object(){public Double testMethod(){return
null;}}.testMethod()):0d; //<-Throws NPE
Throws a NullPointerException. :-/ Ok, that sucks, so what about
this?
Double test3 = new Object(){public Double testMethod2(){return
null;}}.testMethod2(); // result: test3 is null
Double test4 = true?test3:0d; //<-Throws NPE
Also throws a NullPointerException. I suspect this has something
to do with the autoboxing, because
Object test5 = true?new Object(){public Object testMethod3(){return
null;}}.testMethod3():0d;
Works fine. I'm running OS X 10.5 and java 1.5 here at work. Is
this a known issue? Or is this somehow expected behavior?
Ramsey
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