Exporting project into a runnable jar file (libgdx)

So I have my game and it compiles and runs fine, however i cant seem to export it into a runnable jar file? I think eclipse isn’t packing the resources automatically. How do I get a runnable jar file? I can get it to run if I have all the folders beside the jar file. Is there a way to put the folders inside the runnable jar file? (to make it easier to distribute)

thank you.