$ sudo apt-get update
$ sudo apt-get install libini4j-java 

libini4j-java is installed in your system.

Make ensure the libini4j-java package were installed using the commands given below,

$ sudo dpkg-query -l | grep libini4j-java *

You will get with libini4j-java package name, version, architecture and description in a table

libini4j-java package basic information: