RFR: 8286663: Resolve IDE warnings in WTrayIconPeer and SystemTray [v2]

[Harshitha Onkar]

On Tue, 24 May 2022 11:20:36 GMT, Alexey Ivanov <aivanov at openjdk.org> wrote:

>> **WTrayIconPeer**: removed duplicate call to `popupParent.dispose()` that might cause NPE (it looks `popupParent` cannot be `null`); organised imports.
>> 
>> **SystemTray**: removed redundant initialisers; replaced sized array with empty array in `toArray` call; dropped `newValue != null` chained with `equals`.
>
> Alexey Ivanov has updated the pull request incrementally with three additional commits since the last revision:
> 
>  - toArray: new TrayIcon[0] -> EMPTY_TRAY_ARRAY - use existing empty array
>  - Drop explicit type argument
>  - Make popupParent final

@aivanov-jdk In SystemTray.java the following line can be simplified using method reference or lambda expression.
https://github.com/openjdk/jdk/blob/a2f8c9523438ca63380b0b7d4909d5e5e7fbf88a/src/java.desktop/share/classes/java/awt/SystemTray.java#L135

@aivanov-jdk In SystemTray.java the following line can be simplified using method reference or lambda expression.
https://github.com/openjdk/jdk/blob/a2f8c9523438ca63380b0b7d4909d5e5e7fbf88a/src/java.desktop/share/classes/java/awt/SystemTray.java#L135

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