Download to your computer JAVA program in the emulator. In the world wide web provided a large selection of these programs. The best is considered the "Java Runtime", "SjBoy", "MiDpX", "KEmulator".
Install the software on your computer. After installing the java simulator will open any file with an extension .jar. The program works very simple. In order to open the file, click on the right mouse button on the desired file and select "open with". Next, select from the list of installed java emulator.
The advantage of Java - emulator is that you no longer need to write files with the extension jar to your phone to view a game or java application, and browse and try them from the computer.