$ sudo apt-get update
$ sudo apt-get install libjmac-java 

libjmac-java is installed in your system.

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

$ sudo dpkg-query -l | grep libjmac-java *

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

libjmac-java package basic information: