If you have Nokia cell phone then you must have come across the game files that are playable on your phone. Nokia supports Jar game files and these can be easily downloaded from the net.

But if you want to first try the game on the desktop and then install in the phone or just play on the computer itself then here is a small tool that can convert the .jar file into .exe so that the game can be played and installed on the computer itself.

The tool is called JAR2EXE Converter and can easily convert a JAR file (MIDP application, such as Nokia Mobile Games) to an EXE file (Win32 NHAL Emulator). This program will run Midp2Exe compiler to convert JAR file (MIDP Application) to EXE file (Win32 NHAL Emulator). Then, it will copy the output file and the runtime library to the output directory.

What you all need is the input jar file and this tool to test the game on the PC before the Nokia phone.
Download JAR2EXE Converter