RFC: draft API for JEP 269 Convenience Collection Factories

John Rose john.r.rose at oracle.com
Wed Oct 14 20:46:40 UTC 2015

On Oct 14, 2015, at 10:56 AM, Kevin Bourrillion <kevinb at google.com> wrote:
> Anyway, since we created these methods, they became an attractive nuisance,
> and thousands of users reach for them who would have been better off in
> every way using an immutable collection. Our fondest desire is to one day
> be able to delete them. So, obviously, my strong recommendation is not to
> add these to ArrayList, etc.

I agree with Kevin's warning here.  Please, (1) make the immutable version easy to get (List.of not ImmutableList.of), and require users to thoughtfully opt into mutability (new ArrayList not ArrayList.of).

— John

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