Andreas Dangel cac5b15b56 [java] Fix build errors, update LanguageLevelChecker ...

- Update Java20PreviewTreeDumpTest to JUnit5
- Remove GuardedPatterns
- Don't use PatternExpression in case labels
- Update javadocs

2023-02-04 20:14:40 +01:00

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grammar

[java] Fix build errors, update LanguageLevelChecker

2023-02-04 20:14:40 +01:00