Ubuntu :: Running Jar File During Boot And Available For All Users?

I have a jar file which runs as the server with a GUI in my machine and if that starts up i can control my machine with the client in my android phone through LAN. Manually everything works fine if i login and start the server.

What I want to do

1) The server(jar file) should be started at boot

2) This should be available to all users irrespective of who is logged in and if multiple users are logged in simultaneously.

What I have already tried

1) I have tried to add this to the Startup Applications but it does not work always due to some reason after switching between users but even if it works thats not the solution i need because these settings are for a specific user and works after login

2) I tried adding this to rc.local file, but does not work when i login with any user, not sure why. I also tried putting them into all the runlevels (rc*.d folders), but nothing seems to be working. I am not quite sure if i understand how these methods work but when i did boot the server was not there.

3) Manually if i run the jar and switches the user with the first user still logged in, then the server is as good as not running for the second, but if i try to run the jar again, it fails because there is already a process which is running but for first user. If I switch back to first user i have the server.

The Files

1) I have the jar file to execute in /usr/local/bin/
2) I have a shell script in /etc/init.d/ which executes the java - jar command
3) I have the links to rc*.d for all runlevels for the above script

Nothing in the above seems to be working. I just need one process running for all the users, but i never could see the server starting on startup. If I manually start the server its only available to the user who started it.