If you often launch JAR (or JAD) files, and you need to executer these files in various environments, then Hitonic JAR-Starter is what you are looking for.
That's right. You launch the file in the last installed environment.
Hitonic JAR-Starter allows you select the environment on the fly.
Hitonic JAR-Starter launches JAR and JAD files in various J2SE (JDK/JRE) and J2ME (emulators) environments... (more
The program works with the following extensions: jar