JARStarter
Powerful Freeware Tool for Launching Java Applications
If you often launch JAR (or JAD) files, and you need to executer these files in various environments, then JARStarter (old name is Hitonic JAR-Starter) is what you are looking for.
Quick example, you have some Java environments on your PC: Java 2SE JDK 1.4.0, Java 2SE JDK 1.5.0, Sun WTK 1.0.4, Sun SDK 3.0, Nokia S60 3rd FP2 SDK. What happens if you click on a JAR-file?
That's right. You launch the file in the last installed environment.
JARStarter allows you select the environment...