This post explains how to use classes in Java to build objects and organize your code. Also learn: constructors, static methods, and more!

Another interesting concept in this Java code challenge is that we are using an anonymous inner class. This basically means any class that will implement the methods from the Nemesis abstract class.

A method might accept a specific type and its subclasses, but you want to restrict usage to a select few implementations of your own design. Java's open inheritance model can feel like an open ...