Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

    How This Book Is Organized ....................................................................................................2

    Who Should Read This Book ...................................................................................................4

    Conventions Used in This Book ...............................................................................................5

PART I The Java Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

LESSON 1: Getting Started with Java 9

    The Java Language ..................................................................................................................10

    Object-Oriented Programming ................................................................................................13

    Objects and Classes .................................................................................................................14

    Attributes and Behavior ..........................................................................................................16

    Organizing Classes and Class Behavior ..................................................................................25

    Summary .................................................................................................................................32

    Q&A ........................................................................................................................................33

    Quiz .........................................................................................................................................34

    Certification Practice ...............................................................................................................35

    Exercises ..................................................................................................................................35

LESSON 2: The ABCs of Programming 37

    Statements and Expressions ....................................................................................................38

    Variables and Data Types ........................................................................................................38

    Comments................................................................................................................................46

    Literals .....................................................................................................................................47

    String Literals ...............................................................................................................50

    Expressions and Operators ......................................................................................................51

    String Arithmetic .....................................................................................................................60

    Summary .................................................................................................................................62

    Q&A ........................................................................................................................................62

    Quiz .........................................................................................................................................63

    Certification Practice ...............................................................................................................64

    Exercises ..................................................................................................................................65

LESSON 3: Working with Objects 67

    Creating New Objects .............................................................................................................68

    Using Class and Instance Variables ........................................................................................72

    Calling Methods ......................................................................................................................75

    Class Methods ..............................................................................................................79

    References to Objects ..............................................................................................................80

    Casting Objects and Primitive Types ......................................................................................82

    Converting Primitive Types to Objects and Vice Versa ................................................85

    Comparing Object Values and Classes ....................................................................................87

    Summary .................................................................................................................................89

    Q&A ........................................................................................................................................90

    Quiz .........................................................................................................................................91

    Certification Practice ...............................................................................................................91

    Exercises ..................................................................................................................................92

LESSON 4: Lists, Logic, and Loops 93

    Arrays ......................................................................................................................................94

    Block Statements ...................................................................................................................101

    if Conditionals .....................................................................................................................102

    Switch Conditionals ..............................................................................................................103

    The Ternary Operator ............................................................................................................110

    for Loops ..............................................................................................................................111

    while and do Loops ..............................................................................................................114

    xii Sams Teach Yourself Java in 21 Days

    Breaking Out of Loops ..........................................................................................................117

    Summary ...............................................................................................................................119

    Q&A ......................................................................................................................................119

    Quiz .......................................................................................................................................120

    Certification Practice .............................................................................................................121

    Exercises ................................................................................................................................122

LESSON 5: Creating Classes and Methods 123

    Defining Classes ....................................................................................................................124

    Creating Instance and Class Variables ..................................................................................124

    Creating Methods ..................................................................................................................126

    Creating Java Applications ....................................................................................................133

    Java Applications and Arguments .........................................................................................134

    Creating Methods with the Same Name ...............................................................................137

    Constructors ..........................................................................................................................142

    Overriding Methods ..............................................................................................................146

    Summary ...............................................................................................................................150

    Q&A ......................................................................................................................................151

    Quiz .......................................................................................................................................152

    Certification Practice .............................................................................................................153

    Exercises ................................................................................................................................154

LESSON 6: Packages, Interfaces, and Other Class Features 155

    Modifiers ...............................................................................................................................156

    Static Variables and Methods ................................................................................................162

    Final Classes, Methods, and Variables ..................................................................................165

    Abstract Classes and Methods ..............................................................................................167

    Packages ................................................................................................................................167

    Creating Your Own Packages ................................................................................................171

    Interfaces ...............................................................................................................................174

    Creating and Extending Interfaces ........................................................................................177

    Summary ...............................................................................................................................185

    Q&A ......................................................................................................................................186

    Quiz .......................................................................................................................................186

    Certification Practice .............................................................................................................187

    Exercises ................................................................................................................................188

LESSON 7: Exceptions and Threads 189

    Exceptions .............................................................................................................................190

    Managing Exceptions ............................................................................................................193

    Declaring Methods That Might Throw Exceptions ..............................................................200

    Creating and Throwing Exceptions .......................................................................................205

    When Not to Use Exceptions ................................................................................................208

    Threads ..................................................................................................................................209

    Summary ...............................................................................................................................216

    Q&A ......................................................................................................................................217

    Quiz .......................................................................................................................................217

    Certification Practice .............................................................................................................218

    Exercises ................................................................................................................................219

PART II: The Java Class Library . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .221

LESSON 8: Data Structures 223

    Moving Beyond Arrays .........................................................................................................224

    Java Structures .......................................................................................................................224

    Generics .................................................................................................................................244

    Enumerations .........................................................................................................................247

    Summary ...............................................................................................................................249

    Q&A ......................................................................................................................................249

    Quiz .......................................................................................................................................250

    Certification Practice .............................................................................................................251

    Exercises ................................................................................................................................252

LESSON 9: Creating a Graphical User Interface 253

    Creating an Application ........................................................................................................254

    Working with Components ...................................................................................................261

    Lists .......................................................................................................................................274

    The Java Class Library ..........................................................................................................276

    Summary ...............................................................................................................................278

    Q&A ......................................................................................................................................279

    Quiz .......................................................................................................................................279

    Certification Practice .............................................................................................................280

    Exercises ................................................................................................................................281

LESSON 10: Building an Interface 283

    Swing Features ......................................................................................................................284

    Summary ...............................................................................................................................304

    Q&A ......................................................................................................................................304

    Quiz .......................................................................................................................................305

    Certification Practice .............................................................................................................306

    Exercises ................................................................................................................................307

LESSON 11: Arranging Components on a User Interface 309

    Basic Interface Layout ..........................................................................................................310

    Mixing Layout Managers ......................................................................................................320

    Card Layout ...........................................................................................................................321

    Summary ...............................................................................................................................329

    Q&A ......................................................................................................................................330

    Quiz .......................................................................................................................................331

    Certification Practice .............................................................................................................331

    Exercises ................................................................................................................................332

LESSON 12: Responding to User Input 333

    Event Listeners ......................................................................................................................334

    Working with Methods ..........................................................................................................339

    Using Inner Classes ....................................................................................................353

    Summary ...............................................................................................................................355

    Q&A ......................................................................................................................................355

    Quiz .......................................................................................................................................356

    Certification Practice .............................................................................................................357

    Exercises ................................................................................................................................358

LESSON 13: Creating Java2D Graphics 359

    The Graphics2D Class ..........................................................................................................360

    Drawing Text .........................................................................................................................362

    Color ......................................................................................................................................366

    Drawing Lines and Polygons ................................................................................................369

    Summary ...............................................................................................................................378

    Q&A ......................................................................................................................................379

    Quiz .......................................................................................................................................379

    Certification Practice .............................................................................................................380

    Exercises ................................................................................................................................381

LESSON 14: Developing Swing Applications 383

    Improving Performance with SwingWorker .........................................................................384

    Grid Bag Layout ....................................................................................................................389

    Summary ...............................................................................................................................398

    Q&A ......................................................................................................................................398

    Quiz .......................................................................................................................................398

    Certification Practice .............................................................................................................399

    Exercises ................................................................................................................................400

PART III: Java Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .401

LESSON 15: Using Inner Classes and Lambda Expressions 403

    Inner Classes .........................................................................................................................404

    Lambda Expressions .............................................................................................................413

    Variable Type Inference ........................................................................................................418

    Summary ...............................................................................................................................419

    Q&A ......................................................................................................................................420

    Quiz .......................................................................................................................................420

    Certification Practice .............................................................................................................421

    Exercises ................................................................................................................................422

LESSON 16: Working with Input and Output 423

    Introduction to Streams .........................................................................................................424

    Byte Streams .........................................................................................................................426

    Filtering a Stream ..................................................................................................................431

    Character Streams .................................................................................................................440

    Files and Paths.......................................................................................................................445

    Summary ...............................................................................................................................447

    Q&A ......................................................................................................................................448

    Quiz .......................................................................................................................................448

    Certification Practice .............................................................................................................449

    Exercises ................................................................................................................................450

LESSON 17: Communicating Over HTTP 451

    Networking in Java ................................................................................................................452

    The java.nio Package .........................................................................................................465

    Summary ...............................................................................................................................480

    Q&A ......................................................................................................................................480

    Quiz .......................................................................................................................................481

    Certification Practice .............................................................................................................482

    Exercises ................................................................................................................................482

LESSON 18: Accessing Databases with JDBC and Derby 483

    Java Database Connectivity...................................................................................................484

    Summary ...............................................................................................................................501

    Q&A ......................................................................................................................................502

    Quiz .......................................................................................................................................502

    Certification Practice .............................................................................................................503

    Exercises ................................................................................................................................503

LESSON 19: Reading and Writing RSS Feeds 505

    Using XML ...........................................................................................................................506

    Designing an XML Dialect ...................................................................................................508

    Processing XML with Java ...................................................................................................510

    Processing XML with XOM .................................................................................................510

    Summary ...............................................................................................................................525

    Q&A ......................................................................................................................................525

    Quiz .......................................................................................................................................526

    Certification Practice .............................................................................................................527

    Exercises ................................................................................................................................528

LESSON 20: Making Web Service Requests 529

    Introduction to XML-RPC ....................................................................................................530

    Communicating with XML-RPC ..........................................................................................531

    Choosing an XML-RPC Implementation .............................................................................534

    Using an XML-RPC Web Service ........................................................................................536

    Creating an XML-RPC Web Service ....................................................................................539

    Summary ...............................................................................................................................545

    Q&A ......................................................................................................................................545

    Quiz .......................................................................................................................................546

    Certification Practice .............................................................................................................546

    Exercises ................................................................................................................................547

LESSON 21: Writing a Game with Java 549

    Playing a Game .....................................................................................................................550

    Summary ...............................................................................................................................572

    Q&A ......................................................................................................................................572

    Quiz .......................................................................................................................................573

    Certification Practice .............................................................................................................574

    Exercises ................................................................................................................................575

APPENDIXES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 597

APPENDIX A: Using the NetBeans Integrated Development Environment . . . . . . 599

APPENDIX B: Fixing Package Not Visible Errors in NetBeans . . . . . . . . . . . . . . . . 609

APPENDIX C: This Book’s Website. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 613

APPENDIX D: Using the Java Development Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . 615

APPENDIX E: Programming with the Java Development Kit . . . . . . . . . . . . . . . . . 631

9780672337956, TOC, 11/18/2019

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