Use any of these options if you are having trouble running applets to confirm that you have a specific Java version.
The Java version can be found in the Java Control Panel.
The latest version(s) of Java on your system will be listed as Java 7 with an associated Update number (eg. Java 7 Update 21). Older versions may be listed as Java(TM), Java Runtime Environment, Java SE, J2SE or Java 2.