XZ for Java 1.8 is available at <http://tukaani.org/xz/java.html> and in the Maven Central (groupId = org.tukaani, artifactId = xz). Here is an extract from the NEWS file:
* Fix a binary compatibility regression: XZ for Java 1.7 binaries in the Maven Central require Java 9 which is too new. XZ for Java 1.8 binaries require Java 5. (XZ for Java 1.6 and older binaries require Java 1.4.) If you are using OpenJDK 9 or later, you will need to edit the "sourcever = 1.5" line in the file "build.properties" before running "ant". Set it to 1.6 or higher. The default value 1.5 isn't supported by OpenJDK 9 or later. * Add "Automatic-Module-Name" = "org.tukaani.xz". -- Lasse Collin | IRC: Larhzu @ IRCnet & Freenode