Idea to Java ArrayLists

[Remi Forax]

On 07/09/2015 09:05 PM, Pavel Rappo wrote:
>> On 9 Jul 2015, at 18:46, Louis Wasserman <lowasser at google.com> wrote:
>>
>>   what you can do there is new ArrayList<>(Arrays.asList("1", "2", "3", "4", "5"));
> Louis, sure we can do this. No problem with that. But what we are really talking
> about here (as far as I understand) is a convenience. In my opinion there's no
> much difference between
>
>     new ArrayList<>(Arrays.asList("1", "2", "3", "4", "5"));
>
> and
>
>     ArrayList<String> l = new ArrayList<>();
>     l.addAll(Arrays.asList("1", "2", "3", "4", "5"));
>
> or
>
>     ArrayList<String> l = new ArrayList<>();
>     Arrays.asList("1", "2", "3", "4", "5").forEach(l::add);
>
> etc. Thanks for collection types connectivity.

just to be complete , there is also

    ArrayList<String> l = new ArrayList<>();
    Collections.addAll(l, "1", "2", "3", "4", "5");

which avoid the allocation of the intermediary list.

>
> In other words I think the difference between readable and not-so-easily-readable
> code in this particular example is very subjective. What we have here is a very
> special case of creating a _small_ list of easily enumerable elements. I hope
> this work [1] will solve the problem or at least will make it a lot less severe.
>
> ------------------------------------------------------------------------------
> [1] https://bugs.openjdk.java.net/browse/JDK-8048330
>

cheers,
Rémi