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Master Java Generics in 3 Hours
Rating: 4.7 out of 5(35 ratings)
199 students

Master Java Generics in 3 Hours

Deep dive into Java Generics, Raw Types, Wildcards, Type Erasure, Intersection Types, Java Records and Java Optional
Created byViraj Shetty
Last updated 1/2026
English
English [Auto],

What you'll learn

  • Understanding the fundamentals and internals of Java Generics
  • How Java Generics affects all parts of the Java Ecosystem
  • Learn about Wildcards, Lower and upper Bounds, Generic Methods
  • Create your own Generic types
  • Create flexible APIs using Java Generics
  • Read the Javadocs with Generics effectively
  • Learn about Java Records, Nested Classes, Java Optionals and Intersectional Types

Course content

6 sections32 lectures3h 2m total length
  • Course Contents2:22
  • Why Java Generics ?6:17

Requirements

  • Beginner's Knowledge of Java required

Description

Java Generics is extremely important in the Java Ecosystem. Without a deep understanding of Generics, it is now difficult to understand the Javadoc of Java Libraries and applications. We are constantly bombarded with methods which contain a confusing sequence of "?" , "? extends T" or "? super T" .

WHAT THE LEARNERS ARE SAYING:

5 STARS - I took this course as a refresher. It goes through a lot of useful topics in generic, records and optional. It should be helpful for those who are preparing for the Java programmer certification exam.

5 STARS - Excellent course in Java Generics! Clear explanations, concise examples, and engaging delivery made complex concepts easy to grasp. Highly recommended for anyone looking to master Java generics.

5 STARS - As usual excellent course delivered by Viraj! Thank you very much.

5 STARS - Great explanation with Examples

5 STARS - A must have course for professionals who use java for living. Thanks and congratulations to Viraj on delivering yet another quality content! I am big fan of his work!


This course will take a deep look at Java Generics in a intuitive way without any fluff.

  • Why is Java Generics required ?

  • How are Java Generics internally implemented ? And why ?

  • What are Parameterized Types and Raw Types ?

  • What are unbounded and bounded Wildcards ?

  • How do Arrays and Generic Types differ ?

  • How are Java Generics used in Collections, Java Optional and Streams ?

  • How to create your own Generic Types ?

Along the way, we will also learn quite a bit about Java Record, Java Optional, Intersectional Types and Nested classes. There will be constant Quizzes to reinforce the concepts. All of this will make you an expert in Java Generics and how they can be used effectively while writing Java code. At the end of the course, you will be able to use Java Generics comfortably as well as fully understand the Javadoc of complex methods.


REMEMBER… I'm so confident that you'll love this course that we're offering a FULL money-back guarantee for 30 days! So it's a complete no-brainer, sign up today with ZERO risk and EVERYTHING to gain.

Who this course is for:

  • Java Programmers who wants to understand the intricacies of Java Generics
  • Java Library developers who wish to create flexible methods with type safety using Java Generics