RFR: 8284780: Need methods to create pre-sized HashSet and LinkedHashSet [v10]

[XenoAmess]

On Wed, 25 May 2022 05:22:44 GMT, Stuart Marks <smarks at openjdk.org> wrote:

> Yes, this test fails with IllegalAccessException. Probably it's easiest to use a VarHandle to get private fields, similar to other usage already in this test.
> 
> This test case is a bit odd though in that it's supposed to test HashSet and LinkedHashSet but it mostly actually tests HashMap. It creates the Set instance and immediately extracts the HashMap, which is then passed to the actual test, which operates directly on the HashMap.

Considering about it being a whitebox test, it is not very weird, but still weird enough.
A better way might be wrap it into another layer.
Will try it when I have time.

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PR: https://git.openjdk.java.net/jdk/pull/8302