Download or Kemulator Lite (highly customizable PC Java emulators). Load the .jar files directly into the emulator.
Java ME was a software platform that let developers create apps and games that could run on many different devices, regardless of brand. This was revolutionary. It meant a game developed for a Nokia phone could also work on a Sony Ericsson or a Samsung. Because of this cross-platform compatibility, Java became the dominant mobile gaming engine of its time.