Z2 has the following Java Version requirements
|Z2 Version||Min. Java version required||Max Java version supported|
|2.1 - 2.3.1||Java 6||Java 7|
|2.4 - 2.5||Java 8||Java 8|
|2.6 - master||Java 9||Java 9|
Note: Most samples suggest to use the master branch. You may choose another version branch (please check the respective repository).
Make sure you have a corresponding Java Development Kit (JDK) or Java Runtime Environment (JRE) installed. If in doubt, go to Download Java SE.
Note: Running v2.1-v2.3.1 on Java 8 is supported by specifying
(or 6, if that is your desired compilation language level) in
<home>/run/bin/runtime.properties. By this the Java compiler version detection does not fall back to a lower level.