Advanced Java

4.473 hours2K learnersCertificate

Unlock the secrets of Java's low-level mechanisms. Gain practical insights into fault tolerance, high loading, and rare Java features to successfully tackle non-trivial tasks.

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JetBrains Academy

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Study at your own pace

Fit learning around your schedule. Suitable for all levels.

Learn from the experts

Short, practical text lessons by seasoned developers.

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Integrated with professional tools by JetBrains.

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What you'll learn

The course covers design patterns for fault tolerance or high loading and their implementation and introduces task-specific libraries. With essential theory, you will be able to identify the bottlenecks of your application and master effective tools and libraries to achieve high performance. You will dive into some rare Java features (updated to Java 17) and libraries that will be useful for non-trivial tasks. This course doesn't contain graduate projects, but you have the option to practice your knowledge of Java through the recommended projects!

What's included in the course:

a description of the intricacies of the Java Virtual Machine;
full information about generics;
algorithms of various garbage collectors;
java bytecode;
JVM flags and what they do;
benchmarking with JMH;
thread dumping and profiling and why we need it;
heap monitoring and analysis.

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Learn by doing

# 1

Apply knowledge into practice

You already know the theory. Now it's time to code like you do at work—in a professional IDE, with real project constraints, solving problems that actually matter. Welcome to software engineering as it should be.

# 2

Navigate complexity with surgical precision

Most developers waste months learning random concepts without seeing how they connect. Our interactive Knowledge Map fixes this. It shows exactly how every programming concept relates to others, helping you build a structured mental model of coding.

# 3

Copy the best. Then improve.

Here's what top engineers do that others don't: they study other people's code obsessively. When you get stuck on Hyperskill, you can explore solutions published by other developers. See their exact code. Understand their approach. Learn their tricks.

# 4

Code review that actually makes you better

We stripped code review down to what actually matters: does your solution work? Have you handled the edge cases? Is there a cleaner way to write this? Hyperskill acts like a competent reviewer who actually tests your code. Not genius-level analysis, not architecture debates — just solid feedback on making your code better.

Elevate your engineering mastery through real-world challenges

Master advanced engineering concepts through ambitious projects. Each project deepens your expertise and transforms you from an experienced engineer into an exceptional one.

BugBusters

Get ready to put your coding skills to the test by troubleshooting bugs in a project centered on data retention. You'll delve into a world of flawed lines of code, identifying and rectifying errors to hone your abilities. You will practice concepts frequently tested in technical interviews at top tech companies.

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Topics covered by this course

Fundamentals

46 topics

Code organization

37 topics

Basics

26 topics

Working with data

14 topics

Errorless code

13 topics

Java internals

12 topics

Additional instruments

11 topics

Algorithms and Data Structures

6 topics

Math

2 topics

System administration and DevOps

2 topics

Learn from the industry experts

JetBrains Academy

JetBrains Academy is a part of JetBrains, a global software company specializing in the creation of intelligent, productivity-enhancing tools for software developers and teams. With years of expertise in software development and education, JetBrains Academy empowers more than a million people worldwide to learn and teach computer science, and help organizations inspire their teams to reach their goals in tech. Professional development tools play a big role in computer science education. This is why JetBrains Academy courses offer integration with JetBrains IDEs. This integration assists learners in getting experience with real development processes to streamline their learning curve at future work.

Your peers think Hyperskill rocks

Jakub Rössler

5 months ago

I think this is one of the mandatory courses. Definitely worth it if you're new to java.

EVGENII MORGUNOV

9 months ago

I have learned about the internal workings of the Java ecosystem, including JVM internals, generics, exceptions, type casting, reflection, garbage collectors, performance analysis, profiling, and monitoring of applications. The course provided practical insights into fault tolerance, high loading, a ...

Arth Rashmikant Manubhai Prajapati

10 months ago

I learned a lot about the internal working of the Java ecosystem.