RFR 15 8242327: List spec should state that unmodifiable lists implement RandomAccess

Lance Andersen lance.andersen at oracle.com
Wed Apr 8 21:33:46 UTC 2020


Hi Stuart,

This looks good

> On Apr 8, 2020, at 5:01 PM, Stuart Marks <stuart.marks at oracle.com> wrote:
> 
> Hi all,
> 
> Please review this small change to the List interface that specifies that unmodifiable lists (returned by List.of et al) implement the RandomAccess marker interface. In fact, they already do; the intent of this section was to specify the user-visible characteristics of such lists, but this particular characteristic was accidentally omitted.
> 
> https://bugs.openjdk.java.net/browse/JDK-8242327
> 
> Patch below. I'll follow up with a CSR request.
> 
> Thanks,
> 
> s'marks
> 
> 
> # HG changeset patch
> # User smarks
> # Date 1586379408 25200
> #      Wed Apr 08 13:56:48 2020 -0700
> # Node ID f0b78a923c2b2eadfc79cfec7f65377588f10574
> # Parent  46108b5b69d92dd424b73b828454849c397509cb
> 8242327: List spec should state that unmodifiable lists implement RandomAccess
> Reviewed-by: XXX
> 
> diff -r 46108b5b69d9 -r f0b78a923c2b src/java.base/share/classes/java/util/List.java
> --- a/src/java.base/share/classes/java/util/List.java	Tue Apr 07 16:31:46 2020 -0700
> +++ b/src/java.base/share/classes/java/util/List.java	Wed Apr 08 13:56:48 2020 -0700
> @@ -104,6 +104,7 @@
>  * <li>They are serializable if all elements are serializable.
>  * <li>The order of elements in the list is the same as the order of the
>  * provided arguments, or of the elements in the provided array.
> + * <li>The lists and their {@link subList subList} views implement the {@link RandomAccess} interface.
>  * <li>They are <a href="../lang/doc-files/ValueBased.html">value-based</a>.
>  * Callers should make no assumptions about the identity of the returned instances.
>  * Factories are free to create new instances or reuse existing ones. Therefore,
> 

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 <http://oracle.com/us/design/oracle-email-sig-198324.gif>Lance Andersen| Principal Member of Technical Staff | +1.781.442.2037
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