The source code uses the CheckStyle tool to keep the code style consistent.

In addition, we check for code style when building the project using the Maven CheckStyle Plugin. A pull request without proper code style would fail to build.

On IntelliJ follow these steps to configure CheckStyle:

1. Install the CheckStyle plugin
2. Open Preferences/Settings and go to Editor > Code Style.
3. Select Project as Scheme and click the settings icon next to it.
4. Select Import Scheme > CheckStyle Configuration and locate the checkstyle.xml file at the root of Gephi's repository.

You're done. You can now use the built-in Code > Reformat Code tool. The resulting code style will match what is on the Gephi repository.