8342401: [TESTBUG] javax/swing/JSpinner/8223788/JSpinnerButtonFocusTest.java test fails in ubuntu 22.04 on SBR Hosts

[rm-gh-8]

Backporting JDK-8342401: [TESTBUG] javax/swing/JSpinner/8223788/JSpinnerButtonFocusTest.java test fails in ubuntu 22.04 on SBR Hosts.

This PR fixes intermittent JSpinnerButtonFocusTest.java failures caused by timing issues between UI creation and test execution. It adds proper delays, centers frame positioning, and moves listener registration.

For parity with Oracle JDK.

Ran related tests on linux-x64, linux-aarch64, macos-aarch64 and windows-x64:

make test TEST=test/jdk/javax/swing/JSpinner/8223788/JSpinnerButtonFocusTest.java

Results attached:

windows-x64-specific-test.log
macos-aarch64-specific-test.log
linux-x64-specific-test.log
linux-aarch64-specific-test.log

---

Progress

• Change must not contain extraneous whitespace
• JDK-8342401 needs maintainer approval
• Commit message must refer to an issue

Issue

• JDK-8342401: [TESTBUG] javax/swing/JSpinner/8223788/JSpinnerButtonFocusTest.java test fails in ubuntu 22.04 on SBR Hosts (Bug - P4 - Requested)

Reviewing

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Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk25u-dev.git pull/262/head:pull/262
$ git checkout pull/262

Update a local copy of the PR:
$ git checkout pull/262
$ git pull https://git.openjdk.org/jdk25u-dev.git pull/262/head

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Checkout this PR locally:
$ git pr checkout 262

View PR using the GUI difftool:
$ git pr show -t 262

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Download this PR as a diff file:
https://git.openjdk.org/jdk25u-dev/pull/262.diff

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[bridgekeeper]

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[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[openjdk]

⚠️ @rm-gh-8 This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[rm-gh-8]

/approval request for backport of JDK-8342401: [TESTBUG] javax/swing/JSpinner/8223788/JSpinnerButtonFocusTest.java test fails in ubuntu 22.04 on SBR Hosts.

This is a test fix.

For parity with Oracle JDK.

[openjdk]

@rm-gh-8
8342401: The approval request has been created successfully.

[mlbridge]

Webrevs

• 00: Full (e110e5d2)