Ruby is a high-level, fully object-oriented programming (OOP) language. It is very powerful and relatively easy to learn, read, and maintain. Sams Teach Yourself Ruby in 21 Days provides the best introduction to this language and addresses one of the key constraints it faces: "The paucity of quality English-language documentation is one of the few things holding Ruby back from widespread adoption," according to Dr. Curtis Clifton of Iowa State University¿s Department of Graduate Computer Science.

This edition adds coverage of Java 7 and places emphasis on Android programming. There is a new chapter on Android development and additional material where appropriate throughout the book. Coverage of the JDK has been dropped in favor of NetBeans, the free integrated IDE for Java.

Sams Teach Yourself Java in 21 Days Covering Java 7 and Android App Development Sams Teach Yourself Java in 21 Days continues to be one of the most popular, best-selling Java tutorials on the market. Written by an expert technical writer, it has been acclaimed for its clear and personable writing, for its extensive use of examples, and for its logical and complete organization. The sixth edition of Sams Teach Yourself Java in 21 Days adds coverage of Java 7 and places a special emphasis on Android programming, capitalizing on the fastest-growing area of Java programming. There will be a new chapter on Android development and additional material where appropriate throughout the book. This edition also includes new material on using NetBeans, the free integrated IDE for Java. No previous programming experience required. By following the 21 carefully organized lessons in this book, anyone can learn the basics of Java programming. Learn at your own pace. You can work through each chapter sequentially to make sure you thoroughly understand all the concepts and methodologies, or you can focus on specific lessons to learn the techniques that interest you most. ¿ Test your knowledge. Each chapter ends with a Workshop section filled with questions, answers, and exercises for further study. There are even certification practice questions. Completely revised, updated, and expanded to cover the latest features of Java 7 Learn to develop standalone Java applications, Android apps, and Java Web Start applications Easy-to-understand, practical examples clearly illustrate the fundamentals of Java programming Discover how Swing can help you quickly develop programs with a graphical user interface Find out about JDBC 4.1 programming with the Java DB database and XML parsing with the open source XOM class library Covers new features of Java 7 such as improved try-catch exception handling, the new switch, and Nimbus look and feel

The book covers XSLT and Xpath (as a part of XSLT), as these topics have everything to do with processing XML. It will also cover XML from an XSLT processing and design point of view. Other XML technologies will not be discussed as superset of XSLT, most notably XSL. XSL Formatting Objects alone is enough material for an entire book. Apart from that, XSLT and Xpath form the processing/programming section of the entire XSL specification. This book presents an overview of XSLT and guides readers through transforming their first XML data. In this book you will also learn: Selecting Data-Stylesheets and Xpath Basics; Inserting text and elements in output; Copying elements from the source and inserting text; Conditional processing basics and expressions; Modularizing stylesheets; Understanding, creating, and using templates; Controlling output, as well as creating more advanced output; Using multi-file stylesheets, variables, and parameters; Working with numbers, strings, multiple XML sources, and namespaces; Selecting data based upon keys; Recursion; Creating computational stylesheets; Working with parses; Designing XML and XSLT applications; Extending XSLT.

Engineered to be the answer for learning XML, expert author Holzner offers hundreds of real-world examples demonstrating the uses of XML and the newest tools developers need to make the most of it.

In just 21 days you can acquire the knowledge and skills necessary to develop applications on your computer and apps that run on Android phones and tablets. With this complete tutorial you’ll quickly master the basics and then move on to more advanced features and concepts. Completely updated for Java 8, this book teaches you about the Java language and how to use it to create applications for any computing environment and Android apps. By the time you have finished the book, you’ll have well-rounded knowledge of Java and the Java class libraries. Using your new skills, you will be able to develop your own programs for tasks such as web services, database connectivity, XML processing, and mobile programming. No previous programming experience required. By following the 21 carefully organized lessons in this book, anyone can learn the basics of Java programming. Learn at your own pace. You can work through each chapter sequentially to make sure you thoroughly understand all the concepts and methodologies, or you can focus on specific lessons to learn the techniques that interest you most. Test your knowledge. Each chapter ends with a Workshop section filled with questions, answers, and exercises for further study. There are even certification practice questions. Completely revised, updated, and expanded to cover the latest features of Java 8 Learn to develop Java applications and Android apps using NetBeans and Google’s new Android Studio -- two excellent (and free!) programming platforms Covers new features of Java 8 such as closures, the most eagerly anticipated language feature in years Easy-to-understand, practical examples clearly illustrate the fundamentals of Java programming Discover how Swing can help you quickly develop programs with a graphical user interface Find out about JDBC 4.2 programming with the Derby database and XML parsing with the open source XOM class library Learn how to use streams to write programs that communicate with the Internet, including socket programming, buffers, channels, and URL handling. Contents at a Glance WEEK 1: The Java Language DAY 1 Getting Started with Java DAY 2 The ABCs of Programming DAY 3 Working with Objects DAY 4 Lists, Logic, and Loops DAY 5 Creating Classesand Methods DAY 6 Packages, Interfaces, and Other Class Features DAY 7 Exceptions and Threads WEEK 2: The Java Class Library DAY 8 Data Structures DAY 9 Working with Swing DAY 10 Building a Swing Interface DAY 11 Arranging Components on a User Interface DAY 12 Responding to User Input DAY 13 Creating Java2D Graphics DAY 14 Developing Swing Applications WEEK 3: Java Programming DAY 15 Working with Input and Output DAY 16 Using Inner Classes and Closures DAY 17 Communicating Across the Internet DAY 18 Accessing Databases with JDBC 4.2 and Derby DAY 19 Reading and Writing RSS Feeds DAY 20 XML Web Services DAY 21 Writing Android Apps for Java APPENDIX A Using the NetBeans IDE APPENDIX B This Book’s Website APPENDIX C Fixing a Problem with the Android Studio Emulator APPENDIX D Using the Java Development Kit APPENDIX E Programming with the Java Development Kit

In just 21 days, you can acquire the knowledge and skills necessary to develop applications on your computer, web servers, and mobile devices. With this complete tutorial you’ll quickly master the basics and then move on to more advanced features and concepts. Completely updated for Java 11 and 12, this book teaches you about the Java language and how to use it to create applications for any computing environment. By the time you have finished the book, you’ll have well-rounded knowledge of Java and the Java class libraries. No previous programming experience required. By following the 21 carefully organized lessons in this book, anyone can learn the basics of Java programming. Learn at your own pace. You can work through each chapter sequentially to make sure you thoroughly understand all the concepts and methodologies, or you can focus on specific lessons to learn the techniques that interest you most. Test your knowledge. Each chapter ends with a Workshop section filled with questions, answers, and exercises for further study. There are even certification practice questions. Completely revised, updated, and expanded to cover the latest features of Java 11 and 12 Learn to develop Java applications using NetBeans–an excellent programming platform Easy-to-understand, practical examples clearly illustrate the fundamentals of Java programming Discover how to quickly develop programs with a graphical user interface Find out about JDBC programming with the Derby database Learn how to use Inner Classes and Lambda Expressions Learn rapid application development with Apache NetBeans Create a game using Java

In just 21 days, you can acquire the knowledge and skills necessary to develop applications on your computer and apps that run on Android phones and tablets. With this complete tutorial you’ll quickly master the basics and then move on to more advanced features and concepts. Completely updated for Java 11 and 12, this book teaches you about the Java language and how to use it to create applications for any computing environment. By the time you have finished the book, you’ll have well-rounded knowledge of Java and the Java class libraries. No previous programming experience required. By following the 21 carefully organized lessons in this book, anyone can learn the basics of Java programming. Learn at your own pace. You can work through each chapter sequentially to make sure you thoroughly understand all the concepts and methodologies, or you can focus on specific lessons to learn the techniques that interest you most. Test your knowledge. Each chapter ends with a Workshop section filled with questions, answers, and exercises for further study. There are even certification practice questions. Completely revised, updated, and expanded to cover the latest features of Java 11 and 12 Learn to develop Java applications using NetBeans—an excellent programming platform Easy-to-understand, practical examples clearly illustrate the fundamentals of Java programming Discover how to quickly develop programs with a graphical user interface Find out about JDBC programming with the Derby database Learn how to use Inner Classes and Lambda Expressions Use Java for game programming Create a Slackbot with Java (Exclusive Bonus Chapter)

Sams Teach Yourself Java in 24 Hours, Seventh Edition Covers Java 8 and Android Development In just 24 lessons of one hour or less, you can learn the fundamentals of Java programming. 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. Full-color figures and clear instructions visually show you how to program with Java. Popular author Rogers Cadenhead helps you master the skills and technology you need to create desktop and web programs, web services, and even an Android app in Java. Learn how to... Set up your Java programming environment Write your first working program in just minutes Control program decisions and behavior Store and work with information Build straightforward user interfaces Create interactive web programs Use threading to build more responsive programs Read and write files and XML data Master best practices for object-oriented programming Create flexible, interoperable web services with JAX-WS Use Java to create an Android app Expand your skills with closures, the powerful new capability introduced in Java 8 Contents at a Glance PART I: Getting Started 1 Becoming a Programmer 2 Writing Your First Program 3 Vacationing in Java 4 Understanding How Java Programs Work PART II: Learning the Basics of Programming 5 Storing and Changing Information in a Program 6 Using Strings to Communicate 7 Using Conditional Tests to Make Decisions 8 Repeating an Action with Loops PART III: Working with Information in New Ways 9 Storing Information with Arrays 10 Creating Your First Object 11 Describing What Your Object Is Like 12 Making the Most of Existing Objects PART IV: Programming a Graphical User Interface 13 Building a Simple User Interface 14 Laying Out a User Interface 15 Responding to User Input 16 Building a Complex User Interface PART V: Moving into Advanced Topics 17 Storing Objects in Data Structures 18 Handling Errors in a Program 19 Creating a Threaded Program 20 Using Inner Classes and Closures 21 Reading and Writing Files 22 Creating Web Services with JAX-WS 23 Creating Java2D Graphics 24 Writing Android Apps Appendixes A Using the NetBeans Integrated Development Environment B Where to Go from Here: Java Resources C This Book’s Website D Setting Up an Android Development Environment