teach yourself java in 21 days.pdf

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CONTENTS
CONTENTS
Teach Yourself
Java in 21 Days
Professional Reference Edition
by Laura Lemay, Charles L. Perkins and Michael Morrison
C O N T E N T S
Introduction
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What Is Java?
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Java's Past, Present, and Future
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Why Learn Java?
Java Is Platform Independent
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Java Is Object Oriented
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Java Is Easy to Learn
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Getting Started Programming in Java
Getting a Java Development Environment
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Installing the JDK and Sample Files
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Configuring the JDK
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Creating a Java Application
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Creating a Java Applet
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Troubleshooting
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Summary
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Q&A
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Thinking in Objects: An Analogy
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Objects and Classes
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Behavior and Attributes
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CONTENTS
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Attributes
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Behavior
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Creating a Class
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Inheritance, Interfaces, and Packages
Inheritance
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Creating a Class Hierarchy
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How Inheritance Works
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Single and Multiple Inheritance
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Interfaces and Packages
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Creating a Subclass
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Summary
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Q&A
Day 3 Java Basics
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Statements and Expressions
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Variables and Data Types
Declaring Variables
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Notes on Variable Names
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Variable Types
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Assigning Values to Variables
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Comments
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Literals
Number Literals
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Boolean Literals
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Character Literals
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String Literals
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Expressions and Operators
Arithmetic
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More About Assignment
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Incrementing and Decrementing
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Comparisons
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Logical Operators
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Bitwise Operators
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Operator Precedence
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String Arithmetic
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Summary
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Q&A
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Creating New Objects
Using new
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What new Does
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A Note on Memory Management
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Accessing and Setting Class and Instance Variables
Getting Values
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Changing Values
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Class Variables
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Calling Methods
Class Methods
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References to Objects
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Casting and Converting Objects and Primitive Types
Casting Primitive Types
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Casting Objects
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Converting Primitive Types to Objects and Vice Versa
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Odds and Ends
Comparing Objects
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Determining the Class of an Object
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Class and Object Reflection (Java 1.1)
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The Java Class Library
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Summary
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Q&A
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Arrays
Declaring Array Variables
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Creating Array Objects
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Accessing Array Elements
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Changing Array Elements
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Multidimensional Arrays
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Block Statements
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if Conditionals
The Conditional Operator
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switch Conditionals
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for Loops
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while and do Loops
while Loops
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do...while Loops
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Breaking Out of Loops
Labeled Loops
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Summary
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Q&A
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Defining Classes
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Creating Instance and Class Variables
Defining Instance Variables
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Constants
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Class Variables
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Creating Methods
Defining Methods
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The this Keyword
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Variable Scope and Method Definitions
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Passing Arguments to Methods
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Class Methods
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Creating Java Applications
Helper Classes
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Java Applications and Command-Line Arguments
Passing Arguments to Java Programs
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Handling Arguments in Your Java Program
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Summary
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Q&A
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Creating Methods with the Same Name, Different Arguments
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Constructor Methods
Basic Constructors
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Calling Another Constructor
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Overloading Constructors
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Overriding Methods
Creating Methods That Override Existing Methods
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Calling the Original Method
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Overriding Constructors
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Finalizer Methods
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Summary
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Q&A
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How Applets and Applications Are Different
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Creating Applets
Major Applet Activities
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A Simple Applet
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Including an Applet on a Web Page
The <APPLET> Tag
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Testing the Result
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Making Java Applets Available to the Web
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More About the <APPLET> Tag
ALIGN
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HSPACE and VSPACE
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CODE and CODEBASE
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Java Archives
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Passing Parameters to Applets
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Summary
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Q&A
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