Bad Programming Practices 101: Become a Better Coder by Learning How (Not) to Program

© Karl Beecher 2018

Karl BeecherBad Programming Practices 101https://doi.org/10.1007/978-1-4842-3411-2_9

9. Classes and Objects

Karl Beecher¹ 

(1)

Berlin, Germany

 

Objectives

In this chapter, you’ll learn:

• Some bad reasons to create classes

• How to make classes rigid and inflexible

• Lesser alternatives to polymorphism

• How to abuse inheritance in order to compromise your software design

Prerequisites

Before reading this chapter, make sure you’re familiar with:

• The basic ideas behind object-oriented programming, particularly:

  • Instantiation and the difference between a class and an object

  • Composition (i.e., one class containing a reference to another class)

  • Inheritance

• Static methods

• Interfaces in Java, and the interface keyword

Introduction

Like modular programming, ...