z2-Environment

Z2 has the following Java Version requirements

|_. Z2 Version  |_. Min. Java version required |_. Max Java version supported |_. Max language level |

| 2.1 - 2.3.1  | Java 6 | Java 7 | Java 7 |

| 2.4 - 2.5    | Java 8 | Java 8 | Java 8 |

| 2.6  | Java 9 | Java 11 | Java 10 |

| 2.7  | Java 9 | Java 11 | Java 11 |

| 2.8  | Java 9 | Java 13 | Java 13 |

| 2.9b  | Java 8 | Java 8 | Java 8 |

| 2.9.1  | Java 11 | Java 16 | Java 15 |

| 2.9.1b  | Java 8 | Java 8 | Java 8 |

| 2.10  | Java 11 | Java 18 | Java 18 |

| 2.10.1  | Java 11 | Java 21 | Java 18 |

| 2.10.2  | Java 11 | Java 21 | Java 18 |

| master  | Java 17 | ? | Java 23 |

*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":http://www.oracle.com/technetwork/java/javase/downloads/index.html.

*Note:* Running v2.1-v2.3.1 on Java 8 is supported by specifying 

<pre>

com.zfabrik.java.level=7

</pre>

(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.