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 9.

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.

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 Classes and Methods
Day 6 Packages, Interfaces, and Other Class Features
Day 7 Exceptions, Assertions, 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 XRender Graphics
Day 14 Developing Swing Applications

Week 3 Java Programming
Day 15 Working with Input and Output
Day 16 Serializing and Examining Objects
Day 17 Communicating Across the Internet
Day 18 Accessing Databases with JDBC and Derby
Day 19 Reading and Writing RSS Feeds
Day 20 XML Web Services
Day 21 Writing Android Apps for Java

Appendixes
A Using the NetBeans Integrated Development Environment
B This Book's Web Site