On Tue, 12 Apr 2022 19:55:13 GMT, Eamonn McManus <[email protected]> wrote:
>> PR for Sequenced Collections implementation.
>
> src/java.base/share/classes/java/util/LinkedHashMap.java line 604:
>
>> 602: * @return a set view of the keys contained in this map
>> 603: */
>> 604: public SequencedSet<K> keySet() {
>
> Changing the return type means that subclasses of `LinkedHashMap` that
> override `keySet()` will no longer compile, unless they also change the
> return type.
Yes. Previously compiled binaries will also throw `NoSuchMethodError` if they
call `super.keySet()`. Clearly these are incompatibilities; the question is
whether they are severe enough to warrant pursuing a different approach. If you
have any thoughts about how to assess the severity of this change, please let
me know.
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PR Review Comment: https://git.openjdk.org/jdk/pull/7387#discussion_r848945910
