IntelliJ IDEA (hereafter referred to as IntelliJ) is one of the most powerful and popular Integrated Development Environments (IDE) for Java. It was developed and is maintained by JetBrains, and is available in the community and ultimate edition. This feature-rich IDE enables rapid development and helps in improving code quality. This app starts with a basic introduction and slowly dives deep into the advanced features. The app is divided into 2 parts: beginners can start from the first 4 chapters. Others can skip over directly to Chapter-5.

This app is targeted at first-time learners, as well as moderate users of IntelliJ. Beginners will get a fair understanding of IntelliJ and its functioning, and others will be able to take their knowledge on this subject to the next level.

This app requires that the readers have some preliminary knowledge of the software development process, along with the Java programming language. In the later sections of this app, we will discuss integration with build tools, unit testing frameworks, debugger, profiling, version control system, and database. It is assumed that the required tools are installed and configured on the system and the reader is familiar with those tools.