How to check if you have Java installed.....

Java Runtime Environment (JRE) version 1.4.2 or greater must be installed for Lucid3 to run successfully.

To check if you have Java installed on your system, type:

      java -version     in a Command prompt (Windows) or Terminal console (Mac, Unix).

If you receive an "Unknown Command" error message or your Java build number is less than 1.4.2 then you need to install the latest (free) edition of JRE, which can be found at :

For Windows users:
For help and information about JRE please see:
or the download and Installation Instructions:

For Macintosh users:
If you are using OSX 10.3.x or newer, it is recommended that you use Safari as your browser. The key will run, as Java Runtime environment is part of OSX, and Safari will utilize it. However, Internet Explorer version 5.2.3, which is the last version of I.E. for the Mac does not support JRE, nor does Opera.

If you use Firefox, Mozilla or Camino as your browser, there is a Java Embedding Plugin that will enable them to access JRE and run the Key. See the links below for information regarding installation, compatibility and updates for the plugin. The Java Embedding Plugin does not work with Explorer or Opera.

Information and Installation instructions for the Java Embedding Plugin can be found at :

To download the plugin go to the Java Embedding Plugin Summary at :

For Frequently Asked Questions on the JRE please see:

Note : "Java Runtime Environment" is continually being updated for compatibility with operating system updates. Check the links below to see if there is a newer version for your operating system if you are in doubt.


LucID Central HomeCommonwealth Scientific & Industrial Research Organisation

Last Updated: 16 January, 2006 - Maintained by: Ento-Webmaster
Copyright 1997-2005, CSIRO Australia
Use of this web site and information available from it is subject to our Legal Notice and Disclaimer and Privacy Statement