RFR: 8286663: Resolve IDE warnings in WTrayIconPeer and SystemTray

[Alexey Ivanov]

On Mon, 23 May 2022 20:24:52 GMT, Alexey Ivanov <aivanov at openjdk.org> wrote:

>> ok ... why ?
>
> It's explained in Aleksey Shipilёv's article
> https://shipilev.net/blog/2016/arrays-wisdom-ancients/#_conclusion

In fact, there's no need to create zero-sized array, there's one already: `EMPTY_TRAY_ARRAY`.

Yet the code may look weird with it.


return icons.toArray(EMPTY_TRAY_ARRAY);

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PR: https://git.openjdk.java.net/jdk/pull/8850