RFR: 8284993: Replace System.exit call in swing tests with RuntimeException [v3]

[Prasanta Sadhukhan]

On Wed, 20 Apr 2022 19:35:24 GMT, Phil Race <prr at openjdk.org> wrote:

>> Prasanta Sadhukhan has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Test fix
>
> test/jdk/javax/swing/JComboBox/8019180/Test8019180.java line 74:
> 
>> 72:                 if (0 > this.test.getSelectedIndex()) {
>> 73:                     System.err.println("ERROR: no selection");
>> 74:                     throw new RuntimeException("Combobox not selected");
> 
> So this is relying on jtreg to catch exceptions not handled by a thread ?
> Wouldn't it be better to flag the failure and have it thrown by the main thread ?
> 
> BTW since all the client tests are run in othervm mode, System.exit() isn't a real problem but it is still fine to fix this.

modified to throw exception in main

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PR: https://git.openjdk.java.net/jdk/pull/8293