$ java -version
java version "9.0.4"
Java(TM) SE Runtime Environment (build 9.0.4+11)
Java HotSpot(TM) 64-Bit Server VM (build 9.0.4+11, mixed mode)
$ /usr/libexec/java_home -V
Matching Java Virtual Machines (1):
9.0.4, x86_64: "Java SE 9.0.4" /Library/Java/JavaVirtualMachines/jdk-9.0.4.jdk/Contents/Home
/Library/Java/JavaVirtualMachines/jdk-9.0.4.jdk/Contents/Home
$ git clone https://github.com/toranoana/kotlin-webapp.git