4. Introduction to Classes and Objects

Nothing can have value without being an object of utility.

Karl Marx

Your public servants serve you right.

Adlai E. Stevenson

Knowing how to answer one who speaks,

To reply to one who sends a message.

Amenemope

You’ll see something new. Two things. And I call them Thing One and Thing Two.

Dr. Theodor Seuss Geisel

OBJECTIVES

In this chapter you’ll learn:

Image What classes, objects, methods and instance variables are.

Image How to declare a class and use it to create an object.

How to implement a class’s behaviors ...

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