JetBrains Courses

Indexing in IntelliJ IDEA - Making Shared Indexes Fast

See how sharing project indexes can halve IntelliJ IDEA’s indexing time and make its code assistance available sooner.

• YouTube
• 1 hour
• Self-Paced
• Free Video

What We Mean When We Talk About Developer Productivity

A look at how developer productivity can be understood, how IDEs contribute to it, and how developers can adjust their workflows.

• YouTube
• 1 hour
• Self-Paced
• Free Video

Using Java 16 with IntelliJ IDEA

Explore Java 16’s new language features, including Records and pattern matching for instanceof, and see how to use them in IntelliJ IDEA.

• YouTube
• 25 minutes
• Self-Paced
• Free Video

IntelliJ IDEA Spring Tips and Tricks - Building a Spring Boot Application

Build a small Spring Boot application while exploring IntelliJ IDEA shortcuts, Spring context navigation, and bean and dependency analysis.

• YouTube
• 59 minutes
• Self-Paced
• Free Video

Supporting New Technologies, Languages, and Frameworks in IntelliJ IDEA

A look at how IntelliJ IDEA contributors keep pace with new technologies and add support for languages, libraries, and frameworks.

• YouTube
• 58 minutes
• Self-Paced
• Free Video

Data Flow Analysis in IntelliJ IDEA - How the IDE Perceives Your Code

An inside look at how IntelliJ IDEA's analysis engine traces Java code, detects possible errors, and sometimes produces false-positive warnings.

• YouTube
• 1 hour 1 minute
• Self-Paced
• Free Video

Using Maven in IntelliJ IDEA

A hands-on tour of IntelliJ IDEA’s Maven integration, from inspecting POMs and dependencies to running lifecycles and sharing run configurations.

• YouTube
• 1 hour 1 minute
• Self-Paced
• Free Video

Developing Micronaut Applications with IntelliJ IDEA

A live coding session showing how IntelliJ IDEA’s Micronaut support streamlines configuration, endpoint discovery, and HTTP requests.

• YouTube
• 1 hour 3 minutes
• Self-Paced
• Free Video

IntelliJ IDEA - Writing Tests with JUnit 5

Use JUnit 5 features to make automated tests more effective and readable, from grouped assertions to data-driven tests.

• YouTube
• 21 minutes
• Self-Paced
• Free Video

Bootiful Testing with Spring - Test Driven Development and Best Practices

Learn how consumer-driven contract tests check that Spring API producers and consumers work together without relying on end-to-end integration tests.

• YouTube
• 52 minutes
• Self-Paced
• Free Video

Do It Yourself: Collections - Extending Map Data Structures

A hands-on TDD demonstration of extending Java’s Map into a multiset and multimap, with attention to useful APIs and safeguards.

• YouTube
• 57 minutes
• Self-Paced
• Free Video

Advanced Java Stream API Techniques - JetBrains Technology Day

A look at the Stream API’s less obvious capabilities and the advanced tasks it can—and cannot—handle.

• YouTube
• 1 hour 1 minute
• Self-Paced
• Free Video

A Playful Introduction to Rx - Programming a Platform Game

Learn Rx by programming a friendly bug to run and jump through a platform game.

• YouTube
• 1 hour 14 minutes
• Self-Paced
• Free Video

IntelliJ IDEA: Data Modeling with Records - Examples for Busy Developers

Learn when Java records make concise, immutable value types, and how they work with pattern matching, sealed classes, frameworks, and local refactoring.

• YouTube
• 20 minutes
• Self-Paced
• Free Video

Making Sense of Large Java and Kotlin Classes - Understanding and Refactoring Complex Codebases

Learn to understand unfamiliar large classes by tracing behavioral clues, mapping dependencies, and identifying clusters for refactoring.

• YouTube
• 1 hour 38 minutes
• Self-Paced
• Free Video