IntelliJ IDEA is described as 'The JetBrains IDE for pro development in Java and Kotlin. Built for your comfort, it unlocks productivity, ensures quality code, supports cutting-edge tech, and protects your privacy' and is a very popular IDE in the development category. There are more than 50 alternatives to IntelliJ IDEA for a variety of platforms, including Windows, Mac, Linux, Web-based and Android apps. The best IntelliJ IDEA alternative is Visual Studio Code, which is free. Other great apps like IntelliJ IDEA are VSCodium, Eclipse, Microsoft Visual Studio and Zed Editor.
It is not for Java development.