openjdk-9-jre-zero 9.0.4+12-2ubuntu1 (arm64 binary) in ubuntu bionic

 The package provides an alternative runtime using the Zero VM. Built on
 architectures in addition to the Hotspot VM as a debugging aid for those
 architectures which don't have a Hotspot VM.
 .
 The VM is started with the option `-zero'. See the README.Debian for details.