When comparing jFileProcessor vs nnn, the Slant community recommends nnn for most people. In the question“What are the best Linux file managers?” nnn is ranked 1st while jFileProcessor is ranked 31st.
Ranked in these QuestionsQuestion Ranking
Pro Easy to run commands on selected files
Find/select files in sub-folders. run touch %f or cp %f /somefolder (this is a way to copy selected files in different levels, into 1 folder, flattening out the copy).
Pro Easy rename files script
Select files. regex to match pieces of filenames, rename adding, leaving out, and reusing saved pieces.
Pro Groovy scripts to watch and act on files that get created/put into a folder.
So you can watch a folder and process files that come into it.
Pro You can make your own file associations. You can make 3 types, per suffix, per filename, per exact file.
With exact file you can create a folder of job or desktop icon names. Double-click that file to run the job since it is tied to just that specific file.
Pro Can make sftp connections
Pro You can write a script to modify your list
Your script can modify contents in the list window it is working on.
Pro Plugin scripts
Just put groovy scripts in menu-scripts folder and they will automatically run using currently selected files.
Pro Run any groovy scriptable command on a list
Run commands on your lists: grep files to find stuff, delete/copy/move files, etc.. Even copy a file to a remote host and execute it.
Pro Create and work with lists of filenames or any string
Search files and save to another file or a list window. Add or subtract one list from another.
Pro Can do count only
Just count matching search criterion.
Pro Good search
Search on modified time, file size, glob/regex name, folder depth; and/or on these and can do range.
Available for Linux, Windows, macOS - just needs java 7+ (written with 8).
Pro Extremely lightweight (55 kb)
Pro Rich set of plugins
Pro Has a great wiki
Pro Minimal configuration with sane defaults
Default options and navigation is simple to grasp.
Pro Unique navigate-as-you-type mode
Pro Awesome new features being added in every release
Save and resume sessions.
Pro Integrates with the desktop environment and opens files in the default applications
Pro Supports cd-on-quit
Allows for quick switching between nnn and the terminal.
Pro Reasonably well-documented
However, it requires some prior knowledge of inner workings of Linux and there are no tutorials (yet). NNN author is making up for this by actively responding to GitHub issues.
The file manager has recently added support for preview hovered files using various methods.
Pro Customizable icons and colors
Con Does not see attached phone files
No mtp:/ connected phone files.