Primitive streams and optional

[Remi Forax]

On 11/24/2012 10:41 PM, Brian Goetz wrote:
> Also, what's the corresponding proposal for primitive streams?  I would hate to force boxing onto users of:
>
>    Integer x = intStream.filter(...).findFirst();
>
> just because we don't have an int sentinal we can use.

the main issue with this code is that people can write
   int x = intStream.filter(...).findFirst();

a will get a NPE without knowing why.

>    If we're going to do this to people, we might as well give them a null-safe box (OptionalInt) rather than an accident waiting to happen.

I prefer
   int x = intStream.filter(...).findFirst(() -> 0);
or
   int x = intStream.filter(...).findFirst(() -> throw new 
WeAreInTroubleException());

Rémi