I am running Ubuntu 12.04 on my Toshiba Chromebook 2 via crouton (I'm using the xfce4 desktop enviroment so don't give me Unity fixes) and I am trying to run a .jar program through OpenJDK6. I just can't get it to work. Everytime I try it tells me it's not executable. There is no checkbox to make it executable and chmod and sudo chmod aren't working. Please help me!
If in terminal, just type
java -jar /path/to/your/file.jar and you're done.
If you want to start it the graphical way, you need a
*.desktop file. Look into it's documentation or at this answer.
Exec= simply use the command above.