Can t choose class as main class in IntelliJ

Question

I have a Java project in IntelliJ to which I just added a bunch of files in a nested folder hierarchy  Many of these files are tests and include the main method  so I should be able to run them  However I cannot figure out how to do this   I m new to IntelliJ and previously files have shown up in the project hierarchy with the symbol that corresponds to  Java class that contains declaration of the main   method   but in this scenario they show up with the symbol corresponding to  Java class located out of the source root    So how do I compile and run these files

User · Answer

Select the folder containing the package tree of these classes  right-click and choose  Mark Directory as -  Source Root

User · Answer

Here is the complete procedure for IDEA IntelliJ 2019 3    File   Project Structure Under Project Settings   Modules Under  Sources  tab  right-click on  src  folder and select  Sources   Apply changes

User · Answer

The documentation you linked actually has the answer in the link associated with the  Java class located out of the source root   Configure your source and test roots and it should work   https   www jetbrains com idea webhelp configuring-content-roots html  Since you stated that these are tests you should probably go with them marked as Test Source Root instead of Source Root

[java] Can't choose class as main class in IntelliJ

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