How to Jar a Project, Package, or File?
Step 1:
Make sure the jar file path and the type of files you want to be jared are set.
The jar icon will be gray if the file path is not set. Click it to set the correct properties.
Step 2:
Grab the project icon in the project panel (jaring only works if you have a project opened) and drop it onto the Jar icon.
This will add all the files, of the type you defined in the file type textfield, in your project home directory and its subdirectories to the jar file you have specified.