RFR: 8266571: Sequenced Collections [v4]

[Tagir F. Valeev]

On Wed, 29 Mar 2023 19:20:16 GMT, Rémi Forax <forax at openjdk.org> wrote:

>> src/java.base/share/classes/java/util/SequencedCollection.java line 107:
>> 
>>> 105:      */
>>> 106:     default void addFirst(E e) {
>>> 107:         throw new UnsupportedOperationException();
>> 
>> Can this be defaulted to `this.reversed().addLast()` instead? If this throws uoe, the reversed should throw uoe as well; and the new default can simplify implementations by much as well.
>
> In the same spirit, `reversed()` should also have a default implementation equivalent to
> 
>   Collections.unmodifiableSequenceCollection(Arrays.asList(this.toArray())).reversed()

@forax but this would not be a view: changes in the underlying collection won't be reflected

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PR Review Comment: https://git.openjdk.org/jdk/pull/7387#discussion_r1152416692