$ sudo apt-get update
$ sudo apt-get install libjson-simple-java 

libjson-simple-java is installed in your system.

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

$ sudo dpkg-query -l | grep libjson-simple-java *

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

libjson-simple-java package basic information: