IntelliJ

IntelliJ IDEA, commonly referred to as IntelliJ, is an integrated development environment for Java and other programming languages, developed by JetBrains. It emphasizes intelligent code completion, on-the-fly code analysis, reliable refactorings, and ergonomic navigation, aiming to boost developer productivity.

IntelliJ IDEA was first released by JetBrains in 2001. It is available in two main editions: Community Edition, which is free and open-source, and Ultimate Edition, which is a commercial version that adds comprehensive support for web, enterprise, and database development.

The IDE provides robust support for Java and first-class Kotlin and Groovy integrations, with tooling for Scala and other JVM languages. It offers advanced debugging, testing, version control integration (Git, SVN, Mercurial), a built-in decompiler, and a large plugin ecosystem that extends analysis, UI, and framework support. Its smart code completion and refactoring capabilities are central features.

Platform and ecosystem: IntelliJ IDEA runs on Windows, macOS, and Linux, and is widely used in both enterprise and educational settings. JetBrains maintains frequent updates, and the broader ecosystem includes other IDEs such as PyCharm and WebStorm that share the same platform. The Community Edition remains free, while the Ultimate Edition requires a license.