The device which you currently possesses does not need additional 3rd party applications in order to restore Java support. By default, your device is enhanced with Java/Javascript support. The java version installed on your device is using Java MIDP emulator for the compliance of the Java applications. This means that every application/game etc, that was made for java using MIDP libraries will work on your device too. The installation for a JAR/JAD is exactly the same like you were installing an application for Android system.
