<i18n dev> RFR: 8357598: Toolkit.removeAWTEventListener should handle null listener in AWTEventListenerProxy

[Sergey Bylokhov]

On Thu, 22 May 2025 21:21:30 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

> The issue was found here: https://github.com/openjdk/jdk/pull/24692#discussion_r2089545502
> 
> AWTEventListener and AWTEventListenerProxy are public classes and there's no assertion that EventListenerProxy.getListener() will always return a non-null value. So removeAWTEventListener method should fetch the listener from the proxy and check it for null similar to how it is implemented in addAWTEventListener. Currently, it works fine because we never insert null values into the map. So it is just a code clarification.
> 
> One of the test is updated just to touch that codepath.

test/jdk/java/awt/Toolkit/AWTEventListenerProxyTest/AWTEventListenerProxyTest.java line 41:

> 39:         EventQueue.invokeAndWait(() -> {
> 40:             Toolkit tk = Toolkit.getDefaultToolkit();
> 41: 

I do not know why it was disabled on XToolkit, seems to work fine.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25401#discussion_r2106117597