Java In-Depth: Become a Complete Java Engineer! [2026]

Java Programming Bootcamp with Spring Boot, Best Practices, Design Rules & Spring Boot Project — Updated for Java 25

Recent Updates:  *** Updated to Java 25 ***

Jan '26: New in-depth lectures on Virtual Threads have been added in Concurrency Section. Virtual Threads are a major enhancement in Java and enable in building highly scalable Web applications.

Oct '25: New sections on Spring Boot & Spring Framework have been added with a short Maven tutorial as precursor. Course project has also now been extended into a modern Spring Boot Web application.

Mar '25: Added in-depth lectures on Pattern Matching for switch (Java 21) & Pattern Matching for instanceof (Java 16) in Modern Java section. These important new features enable in writing concise, safer, and efficient code.

July '24: In-depth lectures on industry-standard Naming Conventions (under Coding Conventions series) have been added. These conventions are recommended by companies like Google and are followed within the Java library.

Course Introduction:

This Master Course has been meticulously developed for over a decade and follows a unique, industry-vetted curriculum to help you become a Complete & Professional Java Engineer. Its goal is to equip you with Java skills that are needed to be part of top engineering teams like the ones at Google and Amazon. It has over 135,000 students from over 170 countries ranging from complete beginners to experienced Java professionals. Top companies like IBM, TCS, Cognizant, Wipro, and others are actively using this course to upskill their employees. It has been consistently ranked as one of Udemy's top 3 paid Java courses and has helped countless students start their professional journey as "confident" Java programmers.

What Our Students are Saying:

"One of the best courses I have taken on coding in general! On par with courses you can take from Stanford Engineering Everywhere."  ~ Kaloyan T.

"This is hands down the greatest online course I've ever taken ... To really benefit from this course, you'll have to sit there and bang your head but if you take careful notes and make sure you can explain each step you're taking to solve a problem, you'll come out on top. I am now a data engineer and this course is one of the biggest catalysts for my transition into tech." ~ Carlvin Sanon

"This is by far the best advanced as well as beginner course I have ever read/seen since Andre LaMothe quit writing" ~ Stephen Jonson

"Absolutely amazing, complete and in depth course. I would recommend this course to everyone interested in Java and programming in general. Dheeru Mundluru is an exemplary and responsive instructor. He explains the concepts with such clarity and with examples that every thing makes perfect sense. When I started this course, I only had vague idea of programming and now after completing this course I have a solid foundation to build upon. I would certainly say that due to this course I have fell in love with Java language and its ecosystem" ~ Muhammad Arsal Abdullah

"The Instructor is highly competent. He is a world-class instructor ... Taking this course will definitely give you a tremendous appreciation for this great language" ~ Carrel d'Haiti

"It helped me pass a paid internship interview in a reputable company and now i am getting a job." ~ Stephen

"... I have been a Java developer for 8 years and hold a Masters degree in Computer Science ... This is honestly the very best online Java video course on the market... wish I had have had a course like this when I first started" ~ Clive Stewart

"The JVM internals section of this course itself is worth buying this course. Excellent teaching style." ~ Ryan Trang

Course Overview:

This course was built not just to teach Java, but with a larger goal of helping you become a complete & professional Java engineer right by the end of this course. To achieve this, it takes a holistic teaching approach:

• Covers most of the Java language features at a very in-depth level.

• Incorporates tons industry-standard best practices and design rules..

• Guides you in building both Spring Boot & Jakarta (Java) EE-based Web application with real-world conventions and professional workflows.

If the entire course is done systematically, your Java skills will be on par with engineers at top-tier product companies like Google. All your questions are answered in-depth, often within 24 hours — over 10,000 questions have already been answered!

Special Note for College Students: Lecture 3 offers guidance on weekly and semester goals, helping you integrate this course smoothly into your academic schedule.

Course Specifics:

The course starts with a bird's-eye view of Java, from its origins to installing Java and writing your first program. Even the most basic concepts like compilation vs. interpretation are thoroughly explained.

From there, it dives deep into:

• Language Basics

• Object-Oriented Concepts and Design

• JVM Internals

• Exception Handling, IO, Collections, Generics, and Concurrency (including Virtual Threads)

• Database Design (Normalization) & Implementation (SQL, JDBC), Enums, and Nested Classes

• Functional-style Programming using Java 8 Features (Lambdas, Streams)

• Modern Java Features like Virtual Threads (Java 21), Record Classes (Java 16), Pattern Matching for Switch (Java 21) and Switch Expressions (Java 14)

You’ll also get:

• An excellent Eclipse IDE tutorial, which teaches how to use Eclipse professionally for effectively writing, debugging and even testing Java programs using the JUnit framework.

• A concise Maven tutorial to prepare you for the Spring Framework section.

• A solid introduction to Java/Jakarta EE (Servlets, JSP, and JSTL) and Spring Boot & Spring Framework (incl. Spring MVC).

Each lecture has been very carefully crafted explaining the motivation behind every concept. Each concept is clearly explained with well thought out examples & illustrations and is demonstrated in code. Object-oriented concepts like inheritance and polymorphism are taught through a real-world case-study, which is also implemented as part of the course project. Numerous challenging coding exercises and quizzes are included to reinforce what you've learned.

Instructor-Led Project:

The course project involves building a bookmarking Web application using Spring Boot that helps users bookmark items like Books, Movies, and Web pages and is built progressively as new concepts are learned. The project is instructor-led and is implemented using professional coding conventions & best practices. It follows good object-oriented design, incorporates MVC architectural pattern and also uses Test-Driven Development (TDD) methodology. Initially, the project is built using traditional Jakarta/Java EE technologies like Servlets, JSP, and JSTL with MySQL as the database and Apache Tomcat as the Web server. Later the project is migrated into a Spring Boot application giving students first-hand experience in learning the benefits of Spring MVC & Spring Boot. Parts of the project use advanced multi-threading capabilities.

Why This Course Is Unique:

Throughout the course, you’ll learn best practices and design principles—not just how to code, but how to write well-designed, maintainable, and professional-grade software. This is one of the highlights of the course and will make you truly complete!

Story behind Creating this Course:

The idea for building this Master Course has taken its roots during the instructor's (Dheeru Mundluru) experience as a Principal Software Engineer in Silicon Valley. After working for several years with many excellent engineers, Dheeru realized   that even strong teams sometimes struggled to build effective solutions. This led to several rounds of "code refactoring" resulting in loss of valuable time for the organization. He realized this was because programming is often not taught the right way in most universities and colleges. Students typically learn only the core language features, with little or no emphasis on best practices or design rules required to write well-designed, professional-level code. Due to this, developers are often ill-equipped when they have to come up with good solutions for complex problems. This leads to quick ad-hoc & incomplete learning, which often not only result in bad solutions, but also more importantly causes lot of stress on developer's part.

This made Dheeru realize that a more holistic approach to teaching is needed where programming language features are taught along with best practices & design principles needed for building well-designed robust software. This course is a result of this realization and it has taken him a decade of full-time effort. He will continue to devote himself in building this course towards making it one of the best Java courses out there.

Join Today:

Join thousands of learners around the world and start your journey to becoming a complete, confident, and industry-ready Java engineer. Let this be the course that transforms your career!