Java Fundamentals: Generics

By Richard Warburton
Java generics are supposed to be powerful but hard to use - this course makes them easy.
Course info
Rating
(417)
Level
Intermediate
Updated
Oct 31, 2019
Duration
4h 7m
Table of contents
The What and Why of Java Generics
Introduction 4m An Example Class: Circular Buffer 6m Boilerplate vs. Type Safety 5m Making Our Circular Buffer Generic 4m Summary 3m
Java's Generic Collections and Friends
Introduction 2m The Problem with Arrays 5m Lists 9m Sets 4m Maps 7m Conclusions 4m
Generic Classes and Interfaces
Introduction 3m Implementing a Generic Type 9m Passing a Parameter to a Generic Type 6m Type Bounds 8m Conclusion 2m
Generics on Methods
Introduction 4m Context and Motivation 5m How to Write Generic Methods 6m Summary 2m
Wildcards
Introduction 2m The Substitution Principle 9m Upper Bounded Wildcards 5m Lower Bounded Wildcards 8m Unbounded Wildcards 7m Conclusion 4m
Raw Types and Compatibility
The Compatibility Problem 5m Rawtypes 8m Erasure 10m The Implications of Erasure 14m Reified Types and Arrays 9m Summary 4m
Reflection
Introduction 2m Class Literals 8m Reflecting Types 9m Reflecting Generic Information 5m Summary 2m
Advanced Topics
Introduction 2m Functional Interfaces 5m Type Inference and Lambda Expressions 9m Intersection Types 14m Varargs and Generics 9m Conclusions and Recap 6m
Description
Course info
Rating
(417)
Level
Intermediate
Updated
Oct 31, 2019
Duration
4h 7m
Description

Java’s powerful generics has been available to developers for ten years now and is extensively used throughout both core and third party libraries. Unfortunately, it's not as well understood as it could be. This course is here to help. We’ll both shine a light on the common use cases of generics on classes, methods, or interfaces and also peer into some of the darker corners such as type bounds and wildcards.

About the author
Richard Warburton
About the author

Software Engineer, Trainer, Author and Conference Speaker, interested in deep dive performance issues, PhD, Londoner.

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