RFR: 8343237: Improve the copying of the available set of Currencies

[Justin Lu]

On Fri, 1 Nov 2024 23:17:01 GMT, Justin Lu <jlu at openjdk.org> wrote:

> Please review this PR which is a small cleanup in `Currency.getAvailableCurrencies()`. We can use the `HashSet` constructor over `clone()` to make the defensive copy of the set of available currencies. This gets rid of the unsightly unchecked cast and SuppressWarnings annotation.

Thanks for the review.

-------------

PR Comment: https://git.openjdk.org/jdk/pull/21845#issuecomment-2481695608