JCM and Java

Sorry this page is out of date!!

JCM now requires Java version 5+

You need Java 5 or higher installed before you can use JCM
A few new, non-essential, features make use of Java 6
JCM will not work with versions of java older than 5
Note: Java 5 is the same as J2SE 5.0 or Java version 1.5 (so 1.6 is OK, but 1.4 is not)

The applet below should indicate your Java version:
Your browser won't open the applet - try enabling active content!
If that doesn't work, try (re)installing the Java Runtime Environment before refreshing this page.
GetJava Download Button

You can download an updated Java Runtime Environment for free
GetJava Download Button

Note: older versions of JCM up to 2004 only require Java 1.1
Note: To compile the source code requires Java 6 - however Java 5 can be used after commenting out a few methods

Java Cache

Java Web Start stores a cache of JCM which you can run offline.

Other problems

  • If your web browser disables active content, you must enable it before launching JCM.
    (in internet explorer - look for a yellow bar at the top of the page)
  • If your web browser is downloading jnlp files and maybe opening them as text files, but not opening the model, it's because your file associations need resetting. The default application for opening JNLP should be set to Java Webstart.
  • A jar file is a type of zip archive, but it should not be unzipped to run JCM.
    Some packaging applications try to unzip any files with extension ".jar" -in this case right-click, choose "open with"...=> "java executable".

    Back to JCM launch page