How to import jar files in NetBeans

Question

I am trying to build a very basic voice recognition application via a tutorial. I need to add sphinx4-core.jar and sphinx4-data.jar. I added them into my library and am attempting to import them into my code and I get a "package edu.cmu.sphinx.api does not exist" error. Here are my import statements:

import edu.cmu.sphinx.api.Configuration;    
import edu.cmu.sphinx.api.LiveSpeechRecognizer;
import edu.cmu.sphinx.api.SpeechResult; 

To add the jar files I went to tools -> libraries -> add JAR/Folder