C+w) closes the current buffer. If it has
unsaved changes, jEdit will ask if they should be saved first.
C+e C+w) closes all buffers. If any buffers
have unsaved changes, they will be listed in a dialog box where they can
be saved or discarded. In the dialog box, multiple buffers to operate on
at once can be selected by clicking on them in the list while holding
Control. After all buffers have been closed, a new
untitled buffer is opened.
C+q) will completely exit jEdit, prompting
if unsaved buffers should be saved first.