A Programmer's Guide to Java SE 8 Oracle Certified Associate (OCA)

2629 Pages·2016·51.8 MB·English

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®
A Programmer’s Guide to Java SE 8
Oracle Certified Associate (OCA)
A Comprehensive Primer
Khalid A. Mughal
Rolf W. Rasmussen
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To the loving memory of my mother, Zubaida Begum,
and my father, Mohammed Azim
—K.A.M.
For Olivia E. Rasmussen and
Louise J. Dahlmo
—R.W.R.
Contents Overview
Figures
Tables
Examples
Foreword
Preface
1 Basics of Java Programming
2 Language Fundamentals
3 Declarations
4 Access Control
5 Operators and Expressions
6 Control Flow
7 Object-Oriented Programming
8 Fundamental Classes
9 Object Lifetime
10 The ArrayList<E> Class and Lambda Expressions
11 Date and Time
A Taking the Java SE 8 Programmer I Exam
B Exam Topics: Java SE 8 Programmer I
C Annotated Answers to Review Questions
D Solutions to Programming Exercises
E Mock Exam: Java SE 8 Programmer I
F Annotated Answers to Mock Exam I
Index
Contents
Figures
Tables
Examples
Foreword
Preface
1 Basics of Java Programming
1.1 Introduction
1.2 Classes
Declaring Members: Fields and Methods
1.3 Objects
Class Instantiation, Reference Values, and References
Object Aliases
1.4 Instance Members
Invoking Methods
1.5 Static Members
1.6 Inheritance
1.7 Associations: Aggregation and Composition
1.8 Tenets of Java
Review Questions
1.9 Java Programs
1.10 Sample Java Application
Essential Elements of a Java Application
Compiling and Running an Application
1.11 Program Output
Formatted Output
1.12 The Java Ecosystem
Object-Oriented Paradigm
Interpreted: The JVM
Architecture-Neutral and Portable Bytecode
Simplicity
Dynamic and Distributed
Robust and Secure
High Performance and Multithreaded
Review Questions
Chapter Summary
Programming Exercise
2 Language Fundamentals
2.1 Basic Language Elements
Lexical Tokens
Identifiers
Keywords
Separators
Literals
Integer Literals
Floating-Point Literals
Underscores in Numerical Literals
Boolean Literals
Character Literals
String Literals
Whitespace
Comments
Review Questions
2.2 Primitive Data Types
The Integer Types
The char Type
The Floating-Point Types
The boolean Type
Review Questions
2.3 Variable Declarations
Declaring and Initializing Variables
Reference Variables
2.4 Initial Values for Variables
Default Values for Fields
Initializing Local Variables of Primitive Data Types
Initializing Local Reference Variables
Lifetime of Variables
Review Questions
Chapter Summary
Programming Exercise
3 Declarations
3.1 Class Declarations
3.2 Method Declarations
Statements
Instance Methods and the Object Reference this
Method Overloading
3.3 Constructors
The Default Constructor
Overloaded Constructors
Review Questions
3.4 Arrays
Declaring Array Variables
Constructing an Array
Initializing an Array
Using an Array
Anonymous Arrays
Multidimensional Arrays
Sorting Arrays
Searching Arrays
Review Questions
3.5 Parameter Passing
Passing Primitive Data Values
Passing Reference Values
Passing Arrays
Array Elements as Actual Parameters
final Parameters
3.6 Variable Arity Methods
Calling a Variable Arity Method
Variable Arity and Fixed Arity Method Calls
3.7 The main() Method
Program Arguments
3.8 Enumerated Types
Declaring Type-safe Enums
Using Type-safe Enums
Selected Methods for Enum Types
Review Questions
Chapter Summary
Programming Exercise
4 Access Control
4.1 Java Source File Structure
4.2 Packages
Defining Packages
Using Packages
Compiling Code into Packages
Running Code from Packages
4.3 Searching for Classes
Review Questions
4.4 Scope Rules
Class Scope for Members
Block Scope for Local Variables
4.5 Accessibility Modifiers for Top-Level Type Declarations
4.6 Non-Accessibility Modifiers for Classes
abstract Classes
final Classes
Review Questions
4.7 Member Accessibility Modifiers
public Members