Debian and Ubuntu are looking to move to Java 9 for their next releases, for all possible packages. basex currently fails to build with Java 9 due to some rather boring errors:
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.6.1:compile (default-compile) on project basex: Compilation failure: Compilation failure: [ERROR] /build/basex-8.5.1/basex-core/src/main/java/org/basex/query/func/inspect/Inspect.java:[34,3] reference to Module is ambiguous [ERROR] both class org.basex.query.Module in org.basex.query and class java.lang.Module in java.lang match [ERROR] /build/basex-8.5.1/basex-core/src/main/java/org/basex/gui/GUIInput.java:[253,13] incompatible types: javax.swing.JComboBox<java.lang.String> cannot be converted to javax.swing.JComboBox<java.lang.Object> [ERROR] /build/basex-8.5.1/basex-core/src/main/java/org/basex/query/func/crypto/MyKeySelector.java:[51,44] incompatible types: java.util.List<javax.xml.crypto.XMLStructure> cannot be converted to java.util.List<java.lang.Object>
Would there be any interest in fixing these? The website suggests that any version of Java is supported, and Java 9 will be out soon (~31 days).
I can have a go at a pull request, but I'd not heard of basex before today, so maybe someone else would like a stab at it.
I had a quick poke through the mailing list archives, and can't see any other discussion about this; sorry if it's been brought up before.
Chris.