The Java Language trail contains a Generics lesson that is suitable for beginners. Note that this lesson is for advanced users.
Generics - An enhancement to the type system that supports operations on objects of various types while providing compile-time type safety. Full-Screen Exclusive Mode API - How to write applications that more fully utilize the user's graphics hardware. The Extension Mechanism - How to make custom APIs available to all applications running on the Java platform. Custom Networking - An introduction to the Java platform's powerful networking features. These trails and lessons are only available as web pages. Creating a JavaFX GUI - A collection of JavaFX tutorials. Creating a GUI with Swing - A comprehensive introduction to GUI creation on the Java platform. Preparation for Java Programming Language Certification - List of available training and tutorial resources. Deployment - How to package applications and applets using JAR files, and deploy them using Java Web Start and Java Plug-in. Date-Time APIs - How to use the java.time pages to write date and time code. Collections - Lessons on using and extending the Java Collections Framework. 
Essential Java Classes - Lessons on exceptions, basic input/output, concurrency, regular expressions, and the platform environment. Learning the Java Language - Lessons describing the essential concepts and features of the Java Programming Language. Getting Started - An introduction to Java technology and lessons on installing Java development software and using it to create a simple program. To buy this book, refer to the box to the right. These trails are available in book form as The Java Tutorial, Sixth Edition. Groups of related lessons are organized into "trails". They include hundreds of complete, working examples, and dozens of lessons. 
The Java Tutorials are practical guides for programmers who want to use the Java programming language to create applications. See JDK Release Notes for information about new features, enhancements, and removed or deprecated options for all JDK releases. See Java Language Changes for a summary of updated language features in Java SE 9 and subsequent releases. Examples and practices described in this page don't take advantage of improvements introduced in later releases and might use technology no longer available. The Java Tutorials have been written for JDK 8.
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