RFR: 8228773: URLClassLoader constructors should include API note warning that the parent should not be null [v2]

[Jaikiran Pai]

On Thu, 29 May 2025 08:28:12 GMT, Daniel Fuchs <dfuchs at openjdk.org> wrote:

>>   there is no guarantee that all platform classes are visible
>
> sounds (to me) like the behaviour is undefined (which is not the case). A link to the place where the various class loaders are discussed might clarify that.

Alan's suggestion was that we reuse the existing `@apiNote` from the `java.lang.ClassLoader`'s constructor. So this text was borrowed from that place. 

Alan, do you suggest we should reword this?

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PR Review Comment: https://git.openjdk.org/jdk/pull/25517#discussion_r2113931597