$ sudo apt-get update
$ sudo apt-get install libmecab-jni 

libmecab-jni is installed in your system.

Make ensure the libmecab-jni package were installed using the commands given below,

$ sudo dpkg-query -l | grep libmecab-jni *

You will get with libmecab-jni package name, version, architecture and description in a table

libmecab-jni package basic information: