RFR: 8186958: Need method to create pre-sized HashMap [v16]

[Stuart Marks]

On Wed, 13 Apr 2022 20:06:34 GMT, Naoto Sato <naoto at openjdk.org> wrote:

>> XenoAmess has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   revert changes in:
>>   src/java.desktop
>>   src/java.management
>>   src/jdk.internal.vm.ci
>>   src/jdk.jfr
>>   src/jdk.management.jfr
>>   src/jdk.management
>>   src/utils/IdealGraphVisualizer
>
> Looks good for changes in i18n related call sites, assuming that the copyright years will be updated.
> 
> Should we need some additions/modifications to the hashmap optimal capacity utility `test/lib/jdk/test/lib/util/OptimalCapacity.java`?

@naotoj wrote:

> Should we need some additions/modifications to the hashmap optimal capacity utility `test/lib/jdk/test/lib/util/OptimalCapacity.java`?

The only thing that uses this utility now is `test/jdk/java/lang/Enum/ConstantDirectoryOptimalCapacity.java`, which is on the problem list. The cleanup is covered by [JDK-8282120](https://bugs.openjdk.java.net/browse/JDK-8282120). After this PR gets integrated, the Enum ConstantDirectory will be initialized with `HashMap.newHashMap(universe.length)` so the OptimalCapacity test won't really be testing anything. I'll take another look at it and the library utility, but I suspect the cleanup may simply be removing them entirely.

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PR: https://git.openjdk.java.net/jdk/pull/7928