How to deal with error “Java file outside of source root” in IntelliJ

Java is one of the most popular programming languages used to create Web-based applications and platforms, similar to C++, but with advanced features. Java is an independent platform because the Java Compiler converts the source code to bytecode. It is designed to allow developers to write code that runs on any machine.

One of the biggest reasons why Java is so popular is its platform independence. Java is still a relevant programming language that shows no signs of declining in popularity and that’s why it’s worth learning. Most developers choose it as their first programming language because it’s easy to learn.

In this article we will show you how to handle an error that users often encounter. It’s “Java file outside of source root” when using IntelliJ. Follow us to find the solution!

What is “Java file outside of source root intelliJ”?

As you know GitLab is a software responsible for managing Git code repositories. Gitlab owns simple features, making a great contribution to helping businesses, individuals and organizations store code extremely quickly, users can access it anytime, anywhere as long as they have Internet connection. So I updated many branches in intellij to cater for the project I am working on with Gitlab. however something went wrong when I accessed those branches. I don’t know why when I access files on the system, it shows an error of “Java file outside of source root”.

The Solution

Don’t worry, this is an easily fixable error. Here we will give instructions, please follow step by step!

You should note that, when you “import from git”, the program structures in maven (it could also be Gradle) will not be automatically imported by IntelliJ.

To solve this problem, there is a simple way that you can try adding “Add as maven project” when accessing the pom.xml file at the root directory by right clicking. Then the files you need will be marked and the dependent libraries will be imported automatically. This way will help increase accuracy rather than having to manually mark each file separately.

There is a method i found very quick that is by outside IntelliJ, add a git clone then open the project from the master file IntelliJ will help me to import the maven project structure automatically.


Thank you for following our article “How to deal with error “Java file outside of source root” in intelliJ”. Hope the above solutions will be useful to you. In addition, we still have many other articles on related content in the process of using Java, please refer to it!

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