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OFBiz is written in Java and requires the full Sun Java Development Kit (JDK) to run. It won't run on a Java Runtime Environment (JRE) alone. Java workalikes, including Blackdown, Kaffe, OpenJDK, and others do NOT run OFBiz successfully (yet).

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• Trunk: requires Java SDK version 1.6 (or greater)
• 9.04: requires Java SDK version 1.5 (or greater)

Also if you get this kind of error "class file has wrong version 50.0, should be 49.0", below are a list of some of the version numbers and their corresponding Java runtimes:
Version 50.0 = Java 1.6.x
Version 49.0 = Java 1.5.x
Version 48.0 = Java 1.4.x

You can get the latest Sun Java SDK here: http://java.sun.com/javase/downloads/index.jsp

If Java is already installed on your target machine, make sure it is the full JDK and running version 6 (Build 1.6.*). You can chck check this by typing "java -version" (you may also check javac -version) at a command prompt.

Operating system

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