OCP Oracle Certified Professional Java SE 17 Developer Study Guide Exam 1Z0-829

Contents

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