Issue only exists in the Headless platform. Consider this test code:
KeyCombination combination = KeyCombination.valueOf("shortcut+,");
KeyEvent event = new KeyEvent(KeyEvent.KEY_PRESSED, "s", "S", KeyCode.S, false,
true, false, false);
boolean match = combination.match(event);
What happens is that the KeyCombination is an instance of
`KeyCharacterCombination`.
`KeyCharacterCombination` is special, because in its `match` function, it will
call:
`Toolkit.getToolkit().getKeyCodeForChar(getCharacter(), code));`
which will be delegated to the `HeadlessApplication`, which will throw an
`UnsupportedOperationException`.
Most of the time, the `KeyCombination` is not an instance of
`KeyCharacterCombination`, so this exception can only be reproduced with more
special combinations like in the example with the comma.
I used the implementation we also use in `Monocle`. Rechecked with the US
keyboard layout.
---
Trivia: JabRef found this issue when changing their tests from Monocle to
Headless: [GHA
run](https://github.com/JabRef/jabref/actions/runs/34032443925/job/101484543433?pr=16850)
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-------------
Commit messages:
- 8391883: Headless Tests may throw Exception when matching a
KeyCharacterCombination
Changes: https://git.openjdk.org/jfx/pull/2297/files
Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=2297&range=00
Issue: https://bugs.openjdk.org/browse/JDK-8391883
Stats: 132 lines in 2 files changed: 130 ins; 0 del; 2 mod
Patch: https://git.openjdk.org/jfx/pull/2297.diff
Fetch: git fetch https://git.openjdk.org/jfx.git pull/2297/head:pull/2297
PR: https://git.openjdk.org/jfx/pull/2297
