Sign In Start Free Trial

Book Overview & Buying
Table Of Contents

OCA: Oracle Certified Associate Java SE 8 Programmer I Study Guide: Exam 1Z0-808

By : Jeanne Boyarsky, Scott Selikoff

OCA: Oracle Certified Associate Java SE 8 Programmer I Study Guide: Exam 1Z0-808

By: Jeanne Boyarsky, Scott Selikoff

Overview of this book

OCA, Oracle Certified Associate Java SE 8 Programmer I Study Guide, Exam 1Z0-808 is a comprehensive study guide for those taking the Oracle Certified Associate Java SE 8 Programmer I exam (1Z0-808). With complete coverage of 100% of the exam objectives, this book provides everything you need to know to confidently take the exam. The release of Java 8 brought the language’s biggest changes to date, and for the first time, candidates are required to learn functional programming to pass the exam. This study guide has you covered, with thorough functional programming explanation and information on all key topic areas Java programmers need to know. You’ll cover Java inside and out and learn how to apply it efficiently and effectively to create solutions applicable to real-world scenarios.

Free Chapter

Title Page

Title Page

Copyright

Copyright

Publisher's Note

Publisher's Note

Dedication

Dedication

Acknowledgments

Acknowledgments

About the Authors

About the Authors

Introduction

Introduction

The OCA Exam

Scheduling the Exam

The Day of the Exam

Finding Out Your Score

Exam Questions

Getting Started

Getting Help

Who Should Buy This Book

How This Book Is Organized

Free Online Learning Environment

Conventions Used in This Book

OCA Exam Objectives

Assessment Test

Assessment Test

Answers to Assessment Test

Chapter 1: Java Building Blocks

Chapter 1: Java Building Blocks

Understanding the Java Class Structure

Writing a main() Method

Understanding Package Declarations and Imports

Creating Objects

Distinguishing Between Object References and Primitives

Declaring and Initializing Variables

Understanding Default Initialization of Variables

Understanding Variable Scope

Ordering Elements in a Class

Destroying Objects

Benefits of Java

Summary

Exam Essentials

Review Questions

Chapter 2: Operators and Statements

Chapter 2: Operators and Statements

Understanding Java Operators

Working with Binary Arithmetic Operators

Working with Unary Operators

Using Additional Binary Operators

Understanding Java Statements

Understanding Advanced Flow Control

Summary

Exam Essentials

Review Questions

Chapter 3: Core Java APIs

Chapter 3: Core Java APIs

Creating and Manipulating Strings

Using the StringBuilder Class

Understanding Equality

Understanding Java Arrays

Understanding an ArrayList

Working with Dates and Times

Summary

Exam Essentials

Review Questions

Chapter 4: Methods and Encapsulation

Chapter 4: Methods and Encapsulation

Designing Methods

Working with Varargs

Applying Access Modifiers

Passing Data Among Methods

Overloading Methods

Creating Constructors

Encapsulating Data

Writing Simple Lambdas

Summary

Exam Essentials

Review Questions

Chapter 5: Class Design

Chapter 5: Class Design

Introducing Class Inheritance

Creating Abstract Classes

Implementing Interfaces

Understanding Polymorphism

Summary

Exam Essentials

Review Questions

Chapter 6: Exceptions

Chapter 6: Exceptions

Understanding Exceptions

Using a try Statement

Recognizing Common Exception Types

Calling Methods That Throw Exceptions

Summary

Exam Essentials

Review Questions

Free Online Learning Environment

Free Online Learning Environment

End User License Agreement

End User License Agreement

Appendix A: Answers to Review Questions

Appendix A: Answers to Review Questions

Chapter 1: Java Building Blocks

Chapter 2: Operators and Statements

Chapter 3: Core Java APIs

Chapter 4: Methods and Encapsulation

Chapter 5: Class Design

Chapter 6: Exceptions

Appendix B: Study Tips

Appendix B: Study Tips

Studying for the Test

Taking the Test

Working with Varargs

As you saw in the previous chapter, a method may use a vararg parameter (variable argument) as if it is an array. It is a little different than an array, though. A vararg parameter must be the last element in a method's parameter list. This implies you are only allowed to have one vararg parameter per method.

Can you identify why each of these does or doesn't compile? (Yes, there is a lot of practice in this chapter. You have to be really good at identifying valid and invalid methods for the exam.)

public void walk1(int… nums) { }
public void walk2(int start, int… nums) { }
public void walk3(int… nums, int start) { } // DOES NOT COMPILE
public void walk4(int… start, int… nums) { } // DOES NOT COMPILE

walk1() is a valid method declaration with one vararg parameter. walk2() is a valid method declaration with one int parameter and one vararg parameter. walk3() and walk4() do not compile because they have a vararg parameter...

CONTINUE READING

83

Tech Concepts

36

Programming languages

73

Tech Tools

Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.

Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.

50+ new titles added per month and exclusive early access to books as they are being written.

OCA: Oracle Certified Associate Java SE 8 Programmer I Study Guide: Exam 1Z0-808

Search

Your notes and bookmarks