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.

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 C