What does it mean when I compile and run the program and it says "JUnit Version...
JUnit version 4.8.2
Time: 0.002
OK (0 tests)
JUnit is a Framework, that you can use to test your application. If you don't have any test-classes created the UnitTest won't do anything. But if you write test-classes the IDE will check if the program works correctly. See also: https://de.wikipedia.org/wiki/JUnit