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Sams Teach Yourself Java in 21 Days (Covers Java 11/12) (Sams Teach Yourself...)

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en Limba Engleză Paperback – 15 Jan 2020
In arenas ranging from enterprise development to Android app programming, Java remains one of the world's most popular programming languages. Sams Teach Yourself Java in 21 Days helps the serious learner gain true mastery over the new Java 11/12.In this book's straightforward, step-by-step approach, each lesson builds on everything that's come before, helping readers learn Java's core features and techniques from the ground up. Friendly, accessible, and conversational, this book offers a practical grounding in the language, without ever becoming overwhelming or intimidating.Week 1 introduces the basic building blocks of the Java programming language: keywords, operators, class and object definitions, packages, interfaces, exceptions, and threads.Week 2 covers the Swing graphical user interface class libraries and the important classes that support data structures, string handling, dates, and times.Week 3 ventures into the hottest areas of Java programming: web services, Java servlets, network programming, database programming, and Android development.
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Specificații

ISBN-13: 9780672337956
ISBN-10: 0672337959
Pagini: 672
Dimensiuni: 179 x 231 x 36 mm
Greutate: 1 kg
Ediția: 8
Editura: Sams
Seria Sams Teach Yourself...


Notă biografică

Rogers Cadenhead is an experienced software developer who has written more than 30 books on programming and web publishing, including Sams Teach Yourself Java in 24 Hours and Absolute Beginner's Guide to Minecraft Mods Programming. He creates applications on the ServiceNow cloud platform, using Java and JavaScript. He maintains this book's official website, at www.java21days.com, and can be contacted on Twitter at @rcade and on his weblog, at http://workbench.cadenhead.org.

Cuprins

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 .....................................................