Android How to Program

B. Introduction to Classes, Objects, Methods and Strings

Objectives

In this appendix you’ll learn:

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

• How to implement a class’s behaviors as methods.

• How to implement a class’s attributes as instance variables and properties.

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

• What instance variables of a class and local variables of a method are.

• How to use a constructor to initialize an object’s data.

• The differences between primitive and reference types.

Outline

B.1 Introduction

B.2 Declaring a Class with a Method and Instantiating an Object of a Class

B.3 Declaring a Method with a Parameter

B.4 Instance Variables, set Methods and get Methods

B.5 Primitive Types ...