My successful installation for openjdk on Ubuntu 16.04.3 LTS is set up with these installed packages:
ii openjdk-9-jdk-headless:amd64 9~b114-0ubuntu1 amd64 OpenJDK Development Kit (JDK) (headless)
ii openjdk-9-jre:amd64 9~b114-0ubuntu1 amd64 OpenJDK Java runtime, using Hotspot JIT
ii openjdk-9-jre-headless:amd64 9~b114-0ubuntu1 amd64 OpenJDK Java runtime, using Hotspot JIT (headless)
My successful installation for openjdk on Ubuntu 16.04.3 LTS is set up with these installed packages:
ii openjdk- 9-jdk-headless: amd64 9~b114-0ubuntu1 amd64 OpenJDK Development Kit (JDK) (headless)
ii openjdk-9-jre:amd64 9~b114-0ubuntu1 amd64 OpenJDK Java runtime, using Hotspot JIT
ii openjdk- 9-jre-headless: amd64 9~b114-0ubuntu1 amd64 OpenJDK Java runtime, using Hotspot JIT (headless)