Using the Bands in Town API we're making an app to know when our favorite band or musician is in town.   Retrofit Library - https://square.github.io/retrofit/ JSON to POJO - http://www.jsonschema2pojo.org/ Bands in Town API - https://app.swaggerhub.com/api/Bandsintown/PublicAPI/3.0.0 Complete Project Files - https://github.com/kenocvr/ConcertTracker       Bands in Town API Familiarize yourself with the API. Click...

Object Oriented Programming (OOP) – Polymorphism

  Polymorphism means an object takes on many forms. Any object that can pass more than one IS-A test is considered to be polymorphic.   Let's look at this java gist and make sense of it. https://gist.github.com/kenocvr/481d62e78b5d93f0cfedbee411473da8 First we have: public abstract class Animal { public abstract void eat(); } An abstract class serves the purpose...