JCM and Java

Sorry this page is out of date!!

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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.

You can download an updated Java Runtime Environment for free

for Windows or Linux: from Sun at java.com/en/download for Apple-Mac: see apple.com/java

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

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Java Cache

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

• If you accepted to store a desktop shortcut, just click to open it.
  Otherwise look in control panel => java => temporary internet files => view.
• If you get an error saying that the jar files are not all signed by the same key, it may be because an old copy of JCM remains in your cache - try emptying it

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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".

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