$ sudo apt-get update
$ sudo apt-get install libjung-free-java 

libjung-free-java is installed in your system.

Make ensure the libjung-free-java package were installed using the commands given below,

$ sudo dpkg-query -l | grep libjung-free-java *

You will get with libjung-free-java package name, version, architecture and description in a table

libjung-free-java package basic information: