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

libdnsjava-java is installed in your system.

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

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

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

libdnsjava-java package basic information: