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

libswtcalendar-java is installed in your system.

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

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

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

libswtcalendar-java package basic information: