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

libjgraph-java is installed in your system.

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

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

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

libjgraph-java package basic information: