Hello everybody.
My name is Jammy.
I am russian. Sorry about my weak english.
I design a java program for mobile platforms. My program will be deployed as .jar-file.

The problem is:
I don't know how to open external file from my jar. For example
1. if external file is image - i want it to be opened in standard image view program
2. if external file is another jar - i want standard installation program to be run for this jar
and etc...

Is it possible?