Java How to Program, Early Objects, 11th Edition

3 Introduction to Classes, Objects, Methods and Strings

Objectives

In this chapter you’ll:

• Declare a class and use it to create an object.

• Implement a class’s behaviors as methods.

• Implement a class’s attributes as instance variables.

• Call an object’s methods to make them perform their tasks.

• Learn what local variables of a method are and how they differ from instance variables.

• Learn what primitive types and reference types are.

• Use a constructor to initialize an object’s data.

• Represent and use numbers containing decimal points.

• Learn why classes are a natural way to model real-world things and abstract entities.

Outline

1. 3.1 Introduction

2. 3.2 Instance Variables, set Methods and get Methods

   1. 3.2.1 Account Class with an Instance ...