No Java error

If you see the following error message, you'll need to install or update java on your machine.

No JVM could be found on your system.
Please define EXE4J_JAVA_HOME to point to
an installed JDK or JRE or download a JRE from www.java.com

PCs can find the latest version of Java from Sun Microsystems here: http://www.java.com/getjava/
If you're on a Mac, you'll need to visit the apple website here: http://www.apple.com/java/