Creating rpm of a java application in linux or windows

I want my application to be distributed as rpm for linux .

I have one jar file which execute on double click and have few folders and files .i want all this into one rpm so that after installing the package(rpm) the jar file should be executed.

Is there is any tools for this...

please help me..

[320 byte] By [vp_anila] at [2008-3-1]