How To Run Java Mobile Apps (J2ME) On PC
J2ME Applications are made for mobile phones, which is a different platform than Windows. It is not possible to run these apps directly in Windows, however there is a cool thing named KEmulator. It's a J2ME emulator that emulates the Java Mobile environment and let's you run Java Apps on your Windows.
Since J2ME appliations are made in JAVA langauge you need JRE (Java Runtime Environment) to make them run.
Download and install the KEmulator.
Open KEmulator and Go to Midlets to open Jar files.
That's it. You can now run any Java Mobile App or Game the same way.