This book introduces you to programming distributed systems in Java. Special emphasis is placed on the implementation of server-side applications within the Java EE architecture. Step by step, you will learn all the important technologies and components of Enterprise Java, as well as how they interact. Each chapter contains numerous examples and exercises, so that after reading the book, the reader will be able to create component-based web applications based on the Java Enterprise architecture. All exercises, including solutions, as well as the illustrations from the book, are available online.