Adding a library or folder to use in my project

Question

I am trying to add a pie chart to my project and I found this website that says it can help make it with a library or something of the sort. I am not sure what to define it as so I can't really search on how to use it.

This is the thing I want to use: http://blue-walrus.com/2012/09/simple-pie-chart-in-java-swing/

EDIT (the new link is): http://frontangle.com/icharts/#/home

I downloaded their ZIP file and then unzipped it. How am I supposed to include these files into my project? I am currently using IntelliJ IDEA Community Edition 2016.3 as my IDE. This will be programmed in Java.

On a side note, I have imported the Java List but I still can't use sampleList.add() for some reason? Do I need to import something else?

This is what I imported for the list: import java.util.List;

Answer 1

Two options - #1 : Either the ZIP would have a lib/bin/target folder containing some jar. This Jar you need to include in your Project build path.

#2 : If there is a pom.xml, you need to build as in go to that directory & execute as >mvn install. This should create a target folder which would have one or more jars. Include them in your class path.