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KotlinFreeJetBrains Academy

Practical IDE Code Refactoring in Kotlin

Refactor smarter with JetBrains IDE – write clean, scalable Kotlin code.

Advanced
2 days

You'll take this course in your JetBrains IDE.
Just install JetBrains Toolbox 2.7+, and we'll handle the rest!

Advanced
2 days

About

This course teaches you how to turn working Kotlin code into clean, efficient, and maintainable code using JetBrains IDE refactoring tools. You’ll learn to recognize code smells, apply the right refactoring techniques, and use IDE features to transform your projects safely and effectively.

Across eight sections, you’ll progress from local code cleanups to architectural refactorings, mastering tools like rename, extract, move, and inline. You’ll also explore how design patterns such as Facade, Strategy, and Factory Method connect to refactoring practices.

By the end, you’ll not only understand how to use your IDE for cleaner code but also how to think like a developer who writes software that scales – in quality, performance, and design.

Content

  1. Course plan
  2. Join our Discord community
  3. Getting to know you
  1. Introduction
  2. What is code refactoring?
  3. Common code issues and their impact on code quality
  4. Refactoring techniques
  5. Getting familiar with IDE refactoring features
  6. Identifying and fixing code issues
  1. Introduction
  2. What is formatting?
  3. Code schemas and EditorConfig
  1. Introduction
  2. Naming rules
  3. Rename refactoring in IDE
  1. Introduction
  2. Cohesion and coupling
  3. What is Move refactoring?
  4. What are Pull Up and Push Down refactorings?
  1. Introduction
  2. What is Extract Method refactoring?
  3. What is Extract Variable refactoring?
  1. Introduction
  2. What is Inline Variable refactoring?
  3. What is Inline Method refactoring?
  4. Middle Man code smell
  1. Introduction
  2. Design patterns and their relationships with refactoring
  3. Facade pattern - theory
  4. Facade pattern - practice
  5. Strategy pattern - theory
  6. Strategy pattern - practice
  7. Factory Method pattern - theory
  8. Factory Method pattern - practice
  1. Conclusion
  2. Feedback survey

Learn with the tools developers use every day

Real-world development environment
Real-world development environment
Real-world development environment
Real-world development environment

  • Real-world development environment

    Gain practical experience with the tools and workflows you'll use in your career, minimizing the learning curve when transitioning to real-world projects.

  • Project-based learning journey

    Our plugin is built to help you finish real-world coding projects, which you can display in your code portfolio after completion.

  • Collaboration via Git

    Effortlessly track changes and collaborate on projects using Git, an essential tool for programmers in every field.

  • Focused learning

    Enjoy fewer distractions with assignments, code, debugging, and version control all in one window.

Student? Get JetBrains IDEs & hands-on courses — free for the full duration of your studies.

What do you need to start?

1

Install the Free JetBrains Toolbox App

The JetBrains Toolbox App 2.7+ makes setting up your course effortless. Already have a compatible IDE? It will launch it. If not, the app will install the right free IDE for your course.

Learn more about our licences here.

Download
2

Confirm the course launch

Click Launch course and then Allow to open the Toolbox App.

Select Always Allow to skip this confirmation in the future.

To return to the course later, find it in your IDE's recent projects.

Need more help? Check out our guide.

The JetBrains Toolbox App 2.7+ makes setting up your course effortless. Already have a compatible IDE? It will launch it. If not, the app will install the right free IDE for your course.

Learn more about our licences here.

Download

Click Launch course and then Allow to open the Toolbox App.

Select Always Allow to skip this confirmation in the future.

To return to the course later, find it in your IDE's recent projects.

Need more help? Check out our guide.

FAQ and troubleshooting

Yes, you will need the JetBrains Toolbox App and a JetBrains IDE.

But don't worry! Just click the Open course button and then select Allow in the resultant popup to install the JetBrains Toolbox App. We've taken care of all the necessary settings, and the app will handle the rest of the setup for you.

The JetBrains Toolbox App checks which IDE is compatible with your course and whether it is installed on your computer. If you have the necessary IDE installed, the app will open it. If not, JetBrains Toolbox will initiate the installation, prioritizing free community editions.

Yes, the JetBrains Toolbox App is essential even if you already have a JetBrains IDE. It automatically prepares your IDE for studying by installing the essential plugins and updating the IDE if necessary.

Please make sure your version of the JetBrains Toolbox App is 2.6 or newer. To update, open the app and click Update Toolbox App to 2.6.x., or download the latest version here.

Yes! It's 100% free and works with both the free and paid versions of JetBrains IDEs.

If you're a student, apply for the Student Pack to get full access to JetBrains IDEs for the duration of your studies. If not, check if you qualify for a free non-commercial license.

The configuration process may vary depending on the IDE you are using for the course. For detailed instructions, please refer to the Troubleshooting guide.
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The course requires the latest installed version of Toolbox application. If you don’t have it, you can download it here.

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