Failed miserably in this class before... I am back! Just self-studying based on whatever materials I can find online, as I gradually realized how important oop is the more exposed I am to the industry.
Side note: I couldn't get Java up and running in a linux environment so I ended up coding with Eclipse in Window, shame.
Simple class nesting and interface implements, then testing with JUnit test.
Class nesting, interface, abstract class and linked list iteration, then testing with JUnit test. I am very confused with the competition things...