Install libjfreechart-swt-java by entering the following commands in the terminal:
sudo apt update sudo apt install libjfreechart-swt-java
Description:
Chart library for Java (SWT support)
JFreeChart is a free Java class library for generating charts. . This package allows one to use JFreeChart in SWT applications.
Homepage: http://www.jfree.org/jfreechart/
Version: 1.0.19-2
Section: universe/java