Jar Problems

Hello i'm am having problems opening a java applet.

i think it is probably missing a "main class"

my java version is (from $java - version)

Java version "1.6.0_65"

Java(TM) SE Runtime Environment (build 1.6.0_65-b14-466.1-11M4716)

Java HotSpot(TM) 64-Bit Server VM (build 20.65-b04-466.1, mixed mode)

and the error associated with the jar is after ( $java -jar JOdin3CASUAL-r1137-dist.jar )

Exception in thread "main" java.lang.NoClassDefFoundError: com/javafx/main/Main

Caused by: java.lang.ClassNotFoundException: com.javafx.main.Main

at java.net.URLClassLoader$1.run(URLClassLoader.java:202)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(URLClassLoader.java:190)

at java.lang.ClassLoader.loadClass(ClassLoader.java:306)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)

at java.lang.ClassLoader.loadClass(ClassLoader.java:247)