RFR: 8279598: Provide adapter from RandomGenerator to Random [v2]

[liach]

On Fri, 28 Jan 2022 00:36:57 GMT, Yasser Bazzi <duke at openjdk.java.net> wrote:

>> Suggest:
>> 
>>> Returns an instance of {@link java.util.Random} based on this {@code RandomGenerator}.
>>> If this generator is already an instance of {@code Random}, it is returned. Otherwise, this method
>>> returns an instance of {@code Random} that delegates all methods except `setSeed` to this
>>> generator. Its `setSeed` method always throws {@link UnsupportedOperationException}.
>> 
>> (Note no link is necessary for RandomGenerator since we are in that class already.)
>
> Commited the change on df78e05e3e692e2189c9d318fbd4892a4b96a55f

Will we gradually phase out the `Random` class? If yes, we should put this conversion method in `Random` so that we don't break the newer API shall `Random` be retired.

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PR: https://git.openjdk.java.net/jdk/pull/7001