RFR: 8347370: Unnecessary Hashtable usage in javax.swing.text.html.HTML

[Alexey Ivanov]

On Fri, 1 Nov 2024 20:13:31 GMT, Andrey Turbanov <aturbanov at openjdk.org> wrote:

> The Hashtable `javax.swing.text.html.HTML.scMapping` is modified only within `<clinit>` block.
> We can replace it with immutable map to avoid Hashtable synchronization overhead.

Looks good to me.

I'll submit a clientlibs test job and approve the PR once the job is complete.

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PR Review: https://git.openjdk.org/jdk/pull/21842#pullrequestreview-2547703302