[java] Support JDK 18#3837
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Backported from pmd/7.0.x
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oowekyala
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Mar 10, 2022
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| Java Version |Alias | Supported by PMD since | | ||
| -------------|------|------------------------| | ||
| 18-preview | | 6.44.0 | |
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Fixes [java] Support JDK 18 #3809
Note - Java 18 has no new standard language features, so I didn't create a Java18TreeDumpTest.
I didn't find any language change in the preview features for pattern matching, so basically no grammar changes are done (except for the version numbers).
I enhanced UnnecessaryImportRule to support the new
@snippet // @linksyntax in javadoc (JEP 413).Ready?
./mvnw clean verifypasses (checked automatically by github actions)