8294148: Support JSplitPane for instructions and test UI

[luchenlin]

I backport this for parity with 21.0.5-oracle.

---

Progress

• JDK-8294148 needs maintainer approval
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8294148: Support JSplitPane for instructions and test UI (Enhancement - P4 - Approved)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk21u-dev.git pull/662/head:pull/662
$ git checkout pull/662

Update a local copy of the PR:
$ git checkout pull/662
$ git pull https://git.openjdk.org/jdk21u-dev.git pull/662/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 662

View PR using the GUI difftool:
$ git pr show -t 662

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk21u-dev/pull/662.diff

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[bridgekeeper]

👋 Welcome back andrewlu! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

@luchenlin This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8294148: Support JSplitPane for instructions and test UI

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 34 new commits pushed to the master branch:

• 9fef7d8: 8325616: JFR ZGC Allocation Stall events should record stack traces
• 24300eb: 8320602: Lock contention in SchemaDVFactory.getInstance()
• d87f5a3: 8329995: Restricted access to /proc can cause JFR initialization to crash
• cdaabfa: 8322726: C2: Unloaded signature class kills argument value
• ca5fd70: 8332898: failure_handler: log directory of commands
• ec7a205: 8323801: tag doesn't strikethrough the text
• cee2443: 8328234: Remove unused nativeUtils files
• 96249e3: 8328218: Delete test java/awt/Window/FindOwner/FindOwner.html
• 47f4ea8: 8328561: test java/awt/Robot/ManualInstructions/ManualInstructions.java isn't used
• 78d39b1: 8317240: Promptly free OopMapEntry after fail to insert the entry to OopMapCache
• ... and 24 more: https://git.openjdk.org/jdk21u-dev/compare/33a43e5306c8ef511e4c8e98689a87105d887ac0...master

As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

[openjdk]

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

[openjdk]

⚠️ @luchenlin 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.

[mlbridge]

Webrevs

• 00: Full (fa45976c)

[luchenlin]

/integrate

[openjdk]

Going to push as commit a160bd4.
Since your change was applied there have been 35 commits pushed to the master branch:

• d275f51: 8316104: Open source several Swing SplitPane and RadioButton related tests
• 9fef7d8: 8325616: JFR ZGC Allocation Stall events should record stack traces
• 24300eb: 8320602: Lock contention in SchemaDVFactory.getInstance()
• d87f5a3: 8329995: Restricted access to /proc can cause JFR initialization to crash
• cdaabfa: 8322726: C2: Unloaded signature class kills argument value
• ca5fd70: 8332898: failure_handler: log directory of commands
• ec7a205: 8323801: tag doesn't strikethrough the text
• cee2443: 8328234: Remove unused nativeUtils files
• 96249e3: 8328218: Delete test java/awt/Window/FindOwner/FindOwner.html
• 47f4ea8: 8328561: test java/awt/Robot/ManualInstructions/ManualInstructions.java isn't used
• ... and 25 more: https://git.openjdk.org/jdk21u-dev/compare/33a43e5306c8ef511e4c8e98689a87105d887ac0...master

Your commit was automatically rebased without conflicts.

[openjdk]

@luchenlin Pushed as commit a160bd4.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.