OCP Oracle Certified Professional Java SE 17 Developer Study Guide

An effective and practical study aid to the new OCP Java SE 17 Developer certification exam

In the OCP Oracle Certified Professional Java SE 17 Developer Study Guide: Exam 1Z0-829, you'll find accessible and essential test prep material for the in-demand and practical OCP Java SE 17 Developer certification. Providing comprehensive coverage of all OCP Java SE 17 exam objectives and competencies, the Study Guide offers you access to all the skills and knowledge you'll need to succeed on the test and in the field as a new or experienced Java developer.

This book provides material on records, sealed classes, text blocks, dates, streams, controlling program flow, using the Java object-oriented approach, handling exceptions, working with arrays and collections, and more. You'll also get:

• Intuitively organized information that aligns with the competencies tested on the exam and those required by real-world Java developers
• Opportunities to practice and develop skills that remain in high demand in the IT industry
• Access to the Sybex online learning center, with chapter review questions, full-length practice exams, hundreds of electronic flashcards, and a glossary of key terms

Perfect for anyone prepping for the brand-new OCP Java SE 17 credential, OCP Oracle Certified Professional Java SE 17 Developer Study Guide: Exam 1Z0-829 is also a can't-miss reference for practicing and aspiring Java developers seeking to learn or reinforce their foundational skills in Java programming and improve their performance on the job.

Auteur

ABOUT THE AUTHORS

Scott Selikoff has been a professional Java Enterprise architect for over 20 years. He currently works as a Staff Software Engineer at Google, specializing in Architecture and Cloud Services. He is a Leader of the Garden State Java User Group, helping to facilitate discussions and exchange of ideas within the community. Jeanne Boyarsky is a Java Champion and has worked as a Java developer for a major bank for more than 20 years. She is a senior moderator at CodeRanch, and trains and mentors students of all levels, including the programming department of a FIRST robotics team.

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Your complete roadmap to the OCP Java SE 17 Developer exam

The OCP Oracle® Certified Professional Java SE 17 Developer Study Guide is your one-stop resource for authoritative coverage of the 1Z0-829 exam. This Sybex Study Guide covers 100% of the 1Z0-829 objective domains. Prepare for the exam smarter and faster with Sybex thanks to focused content that validates and measures exam readiness, real-world examples and scenarios, practical exercises, and chapter review questions. Reinforce and retain what you've learned with the Sybex online learning environment and test bank, accessible across multiple devices. Prepare for success on the Java SE 17 Developer exam with Sybex. Coverage of 100% of all exam objectives in this Study Guide means you'll be ready for:

• Directing Flow with Decision Statements, Pattern Matching, and Switch Expressions
• Working with Primitives, Strings, var, and Text Blocks
• Creating Lambda Expressions and Method References
• Designing Classes, Interfaces, Enums, Records, and Sealed Classes
• Writing Functional Interfaces and Streams
• Building Modules and Migrating Applications to Modules
• Applying I/O, NIO.2, JDBC, Threads, and Concurrency
• Localizing Applications and Formatting Dates/Numbers

• Gracefully Handling Exceptions and Errors and more... ABOUT THE ORACLE CERTIFIED PROFESSIONAL PROGRAM The OCP Oracle Certified Professional Java SE 17 Developer certification validates advanced understanding of Oracle concepts and skills as well as experience applying them in the real world. The focus is on advanced developer skills with a strong foundation in Java technology. Interactive learning environment Take your exam prep to the next level with Sybex's superior interactive online study tools. To access our learning environment, simply visit www.wiley.com/go/sybextestprep, register your book to receive your unique PIN, and instantly gain one year of FREE access after activation to:

• Interactive test bank with 3 practice exams to help you identify areas where further review is needed. Get more than 90% of the answers correct, and you're ready to take the certification exam.
• More than 500 electronic flashcards to reinforce learning and last-minute prep before the exam
• Comprehensive glossary in PDF format gives you instant access to the key terms so you are fully prepared

Contenu

Introduction xxiii

Assessment Test xlv
Chapter 1 Building Blocks 1

Learning about the Environment 2

Major Components of Java 2

Downloading a JDK 3

Understanding the Class Structure 4

Fields and Methods 4

Comments 5

Classes and Source Files 7

Writing a main() Method 8

Creating a main() Method 8

Passing Parameters to a Java Program 9

Understanding Package Declarations and Imports 11

Packages 12

Wildcards 13

Redundant Imports 13

Naming Conflicts 15

Creating a New Package 16

Compiling and Running Code with Packages 16

Compiling to Another Directory 18

Compiling with JAR Files 20

Creating a JAR File 20

Ordering Elements in a Class 21

Creating Objects 23

Calling Constructors 23

Reading and Writing Member Fields 24

Executing Instance Initializer Blocks 24

Following the Order of Initialization 25

Understanding Data Types 26

Using Primitive Types 27

Using Reference Types 29

Distinguishing between Primitives and Reference Types 30

Creating Wrapper Classes 31

Defining Text Blocks 32

Declaring Variables 34

Identifying Identifiers 35

Declaring Multiple Variables 36

Initializing Variables 38

Creating Local Variables 38

Passing Constructor and Method Parameters 40

Defining Instance and Class Variables 41

Inferring the Type with var 41

Managing Variable Scope 45

Limiting Scope 45

Tracing Scope 46

Applying Scope to Classes 47

Reviewing Scope 48

Destroying Objects 48

Understanding Garbage Collection 48

Tracing Eligibility 49

Summary 51

Exam Essentials 52

Review Questions 54

Chapter 2 Operators 65

Understanding Java Operators 66

Types of Operators 66

Operator Precedence 67

Applying Unary Operators 69

Complement and Negation Operators 70

Increment and Decrement Operators 71

Working with Binary Arithmetic Operators 72

Arithmetic Operators 72

Numeric Promotion 75

Assigning Values 77

Assignment Operator 77

Casting Values 77

Compound Assignment Operators 81

Return Value of Assignment Operators 82

Comparing Values 83

Equality Operators 83

Relational Operators 84

Logical Operators 87

Conditional Operators 88

Making Decisions with the Ternary Operator 90

Summary 92

Exam Essentials 92

Review Questions 94

Chapter 3 Making Decisions 101

Creating Decision- Making Statements 102

Statements and Blocks 102

The if Statement 103

The else Statement 104

Shortening Code with Pattern Matching 106

Applying switch Statements 110

The switch Statement 110

The switch Expression 115

Writing while Loops 121

The while Statement 121

The do/while Statement 123

Infinite Loops 123

Constructing for Loops 124

The for Loop 124

The for- each Loop 129

Controlling Flow with Branching 131

Nested Loops 131

Adding Optional Labels 132

The break Statement 133

The continue Statement 135

The return Statement 137

Unreachable Code 138

Reviewing Branching 139

Summary 139

Exam Essentials 140

Review Questions 142

Chapter 4 Core APIs 155

Creating and Manipulating Strings 156

Concatenating 157

Important String Methods 158

Method Chaining 169

Using the StringBuild…