Bump the base Java version to 17 (resolves #389)#501
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java.version 1.8 -> 17 (compiler source/target + Kotlin jvmTarget); CI matrix [8.x,11.x,17.x,21.x] -> [17.x,21.x] and the coverage/javadoc/snapshot/release gates move from the JDK-8 build to JDK-17. mvn test green on JDK 11 and 17 (2104/2104, = JDK-8 baseline). Resolves making#389.
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Resolves #389 (prerequisite for #388 and #390; also resolves #160).
Changes
pom.xml:java.version1.8→17— drives the compilersource/targetand the KotlinjvmTarget..github/workflows/ci.yaml: CI matrix[8.x, 11.x, 17.x, 21.x]→[17.x, 21.x](the 8.x/11.x axes can no longer compile Java-17 source), and the coverage / javadoc / snapshot / release gates move from the JDK-8 build to the JDK-17 build so published artifacts ship Java-17 bytecode.Verification
Migrated one LTS step at a time and ran
mvn testat each hop:Identical to the JDK-8 baseline (2104 / 2104). No source changes and no dependency bumps were needed — pure Java, no
--add-opens/ EE / Lombok walls, andspring-javaformatvalidates cleanly on 17.🤖 Migrated with the bump-java-version skill.