Learn Java 17 Programming: Learn the fundamentals of Java Programming with this updated guide with the latest features. 2 Ed

Cover....1

Title Page....2

Copyright and Credits....2

Contributors....4

Table of Contents....8

Preface....18

Part 1: Overview of Java Programming....26

Chapter 1: Getting Started with Java 17....28

Technical requirements....29

How to install and run Java....29

What is the JDK and why do we need it?....30

Installing Java SE....32

Commands, tools, and utilities....32

How to install and run an IDE....33

Selecting an IDE....34

Installing and configuring IntelliJ IDEA....35

Creating a project....36

Importing a project....42

Executing examples from the command line....47

Java primitive types and operators....48

Boolean types....48

Numeric types....49

Default values of primitive types....52

Literals of primitive types....53

New compact number format....56

Operators....57

String types and literals....62

String literals....63

String immutability....66

IDs and variables....66

ID....67

Variable declaration (definition) and initialization....67

Java statements....68

Expression statements....70

Control flow statements....71

Summary....84

Quiz....84

Chapter 2: Java Object-Oriented Programming (OOP)....90

Technical requirements....91

OOP concepts....92

Object/class....92

Inheritance....93

Abstraction/interface....94

Encapsulation....95

Polymorphism....96

Class....96

Method....98

Constructor....100

The new operator....103

Class java.lang.Object....105

Instance and static properties and methods....110

Interface....112

Default methods....113

Private methods....115

Static fields and methods....116

Interface versus abstract class....116

Overloading, overriding, and hiding....117

Overloading....117

Overriding....119

Hiding....121

The final variable, method, and classes....125

The final variable....125

Final method....127

Final class....128

The record class....128

Sealed classes and interfaces....130

Polymorphism in action....134

The object factory....134

The instanceof operator....137

Summary....139

Quiz....139

Chapter 3: Java Fundamentals....144

Technical requirements....145

Packages, importing, and access....145

Packages....145

Importing ....146

Access modifiers....148

Java reference types....152

Class and interface....152

Array....153

Enum....155

Default values and literals ....158

A reference type as a method parameter....158

equals() method ....161

Reserved and restricted keywords....164

Reserved keywords....164

Reserved identifiers....165

Reserved words for literal values....165

Restricted keywords....165

Usage of the this and super keywords....166

Usage of the this keyword....166

Usage of the super keyword ....168

Converting between primitive types....169

Widening conversion....169

Narrowing conversion....170

Methods of conversion....171

Converting between primitive and reference types....174

Boxing....174

Unboxing....175

Summary....176

Quiz....177

Part 2: Building Blocks of Java....180

Chapter 4: Exception Handling....182

Technical requirements....183

The Java exceptions framework....183

Checked and unchecked exceptions....185

The try, catch, and finally blocks....187

The throws statement....190

The throw statement....192

The assert statement....193

Best practices of exception handling....193

Summary....194

Quiz....195

Chapter 5: Strings, Input/Output, and Files....198

Technical requirements....199

String processing....199

Methods of the String class ....199

String utilities....206

I/O streams....209

Stream data....210

The InputStream class and its subclasses....211

The OutputStream class and its subclasses....222

The Reader and Writer classes and their subclasses....226

Other classes of the java.io package....228

The java.util.Scanner class....238

File management....241

Creating and deleting files and directories....241

Listing files and directories....244

Apache Commons’ FileUtils and IOUtils utilities ....245

The FileUtils class....246

The IOUtils class....247

Summary....247

Quiz....248

Chapter 6: Data Structures, Generics, and Popular Utilities....252

Technical requirements....253

List, Set, and Map interfaces....253

Generics....254

How to initialize List and Set....255

java.lang.Iterable interface....259

Collection interface....260

List interface....263

Set interface ....266

Map interface....267

Unmodifiable collections....270

Collections utilities....271

java.util.Collections class....272

CollectionUtils class....274

Arrays utilities....276

java.util.Arrays class....276

ArrayUtils class....278

Objects utilities....279

java.util.Objects class....279

ObjectUtils class....284

The java.time package....285

LocalDate class....285

LocalTime class....289

LocalDateTime class....291

Period and Duration classes....292

Period of day....294

Summary....295

Quiz....295

Chapter 7: Java Standard and External Libraries....302

Technical requirements....303

Java Class Library (JCL)....303

java.lang....304

java.util....305

java.time....306

java.io and java.nio....307

java.sql and javax.sql....307

java.net....307

java.lang.math and java.math....308

java.awt, javax.swing, and javafx....308

External libraries....309

org.junit....309

org.mockito....311

org.apache.log4j and org.slf4j....312

org.apache.commons....315

Summary....320

Quiz....320

Chapter 8: Multithreading and Concurrent Processing....324

Technical requirements....325

Thread versus process....325

User thread versus daemon....326

Extending the Thread class....326

Implementing the Runnable interface....328

Extending Thread versus implementing Runnable....330

Using a pool of threads....331

Getting results from a thread....339

Parallel versus concurrent processing....346

Concurrent modification of the same resource....346

Atomic variable....350

Synchronized method....353

Synchronized block....354

Concurrent collections ....355

Addressing memory consistency errors....358

Summary....358

Quiz....359

Chapter 9: JVM Structure and Garbage Collection....362

Technical requirements....363

Java application execution....363

Using an IDE....363

Using the command line with classes....369

Using the command line with JAR files....370

Using the command line with an executable JAR file....371

Java processes ....372

Classloading....375

Class linking....376

Class initialization....377

Class instantiation....377

Method execution....378

Garbage collection....378

Application termination....378

JVM’s structure....380

Runtime data areas....380

Classloaders....381

Execution engine....381

Garbage collection....382

Responsiveness, throughput, and stop-the-world....382

Object age and generation....383

When stop-the-world is unavoidable....383

Summary....384

Quiz....384

Chapter 10: Managing Data in a Database....388

Technical requirements....389

Creating a database....389

Creating a database structure....391

Connecting to a database....394

Releasing the connection....397

CRUD data....398

The INSERT statement....398

The SELECT statement....399

The UPDATE statement....400

The DELETE statement....401

Using statements....401

Using PreparedStatement....408

Using CallableStatement....410

Using a shared library JAR file to access a database....412

Summary....417

Quiz....417

Chapter 11: Network Programming....422

Technical requirements....423

Network protocols....423

UDP-based communication....424

TCP-based communication....429

The java.net.ServerSocket class....430

The java.net.Socket class....433

Running the examples....435

UDP versus TCP protocols....437

URL-based communication....438

The URL syntax....438

The java.net.URL class....439

Using the HTTP 2 Client API....449

Blocking HTTP requests....451

Non-blocking (asynchronous) HTTP requests....453

Server push functionality....459

WebSocket support....461

Summary....463

Quiz....464

Chapter 12: Java GUI Programming....466

Technical requirements....467

Java GUI technologies....467

JavaFX fundamentals....468

HelloWorld with JavaFX....472

Control elements....475

Charts....479

Applying CSS....481

Using FXML....483

Embedding HTML....493

Playing media....503

Adding effects....509

Summary....535

Quiz....535

Part 3: Advanced Java....536

Chapter 13: Functional Programming....538

Technical requirements....539

What is functional programming?....539

What is a functional interface?....542

What is a Lambda expression?....544

Standard functional interfaces....548

Consumer....548

Predicate....550

Supplier....552

Function....553

Other standard functional interfaces....556

Lambda expression limitations....557

Method references....559

Summary....562

Quiz....563

Chapter 14: Java Standard Streams....564

Technical requirements....565

Streams as a source of data and operations....565

Stream initialization....567

Stream interface....567

The Stream.Builder interface....572

Other classes and interfaces....574

Operations (methods)....576

Intermediate operations....578

Terminal operations....582

Numeric stream interfaces....606

Creating a stream....607

Intermediate operations....607

Terminal operations....611

Parallel streams....612

Stateless and stateful operations....612

Sequential or parallel processing?....613

Summary....616

Quiz....617

Chapter 15: Reactive Programming....620

Technical requirements....621

Asynchronous processing....621

Sequential and parallel streams....622

Using the CompletableFuture object....624

Non-blocking APIs....625

The java.io package versus the java.nio package....625

The event/run loop....626

Reactive....627

Responsive....628

Resilient....628

Elastic....629

Message-driven....629

Reactive streams....630

RxJava....631

Observable types....634

Disposable....643

Creating an observable....645

Operators....647

Multithreading (scheduler)....659

Summary....666

Quiz....666

Chapter 16: Java Microbenchmark Harness....668

Technical requirements....669

What is JMH?....669

Creating a JMH benchmark....672

Running the benchmark....674

Using an IDE plugin....674

JMH benchmark parameters....677

Mode....677

Output time unit....678

Iterations....678

Forking....678

JMH usage examples....679

Using the @State annotation....681

Using the Blackhole object....682

Using the @CompilerControl annotation....683

Using the @Param annotation....683

A word of caution....684

Summary....685

Quiz....685

Chapter 17: Best Practices for Writing High-Quality Code....688

Technical requirements....689

Java idioms, their implementation, and their usage....689

The equals() and hashCode() methods....690

The compareTo() method....693

The clone() method....695

The StringBuffer and StringBuilder classes....701

The try, catch, and finally clauses....701

Best design practices....701

Identifying loosely coupled functional areas....702

Breaking the functional area into traditional tiers....702

Coding to an interface....702

Using factories....703

Preferring composition over inheritance....703

Using libraries....703

Code is written for people....704

Use well-established frameworks and libraries....705

Testing is the shortest path to quality code....712

Summary....712

Quiz....713

Assessments....714

Chapter 1 – Getting Started with Java 17....714

Chapter 2 – Java Object-Oriented Programming (OOP)....715

Chapter 3 – Java Fundamentals....715

Chapter 4 – Exception Handling....716

Chapter 5 – Strings, Input/Output, and Files....716

Chapter 6 – Data Structures, Generics, and Popular Utilities....717

Chapter 7 – Java Standard and External Libraries....717

Chapter 8 – Multithreading and Concurrent Processing....718

Chapter 9 – JVM Structure and Garbage Collection....719

Chapter 10 – Managing Data in a Database....719

Chapter 11 – Network Programming....720

Chapter 12 – Java GUI Programming....721

Chapter 13 – Functional Programming....721

Chapter 14 – Java Standard Streams....722

Chapter 15 – Reactive Programming....722

Chapter 16 – Java Microbenchmark Harness....723

Chapter 17 – Best Practices for Writing High-Quality Code....724

Index....726

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Learn the fundamentals of Java Programming with this updated guide with the latest features

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