1. Getting Started 3 1. Getting Started 1.1. Requirements Jess is a programmer's library written in Java. Therefore, to use Jess, you'll need a Java Virtual Machine (JVM). You can get an excellent JVM for Windows, Linux, and Solaris free from Sun Microsystems . Jess 7.1 is compatible with all released versions of Java starting with JDK 1.4, including JDK 1.6, the latest release. Older Jess versions numbered 4.x were compatible with JDK 1.0, 5.x versions worked with JDK 1.1, and Jess 6 worked with JDK 1.2 and up. Be sure your JVM is installed and working correctly before trying to use Jess. To use the JessDE integrated development environment, you'll need version 3.1 or later of the Eclipse SDK from http://www.eclipse.org . Be sure that Eclipse is installed and working properly before installing the JessDE. The Jess library serves as an interpreter for another language, which I will refer to in this document as the Jess language. The Jess language is a highly specialized form of Lisp. I am going to assume that you, the reader, are a programmer who will be using either one or
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