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The official document: http://www.jetbrains.com/help/idea/2017.1/content-root.html
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Roots Source (or Source Folders; Shown AS
) directory labeled source roots. This will tell IntelliJ IDEA, when the project needs to compile the existence of this folder in the source code -
Source roots the Generated (or Generated Source Folders; Shown AS
; Certain views in The [Generated] Used text marker IS) source roots and similar. The difference is that, in the implementation of Move Class refactoring or Create class use quick fix in, Generated source roots are not recommended as the destination folder. -
Source roots the Test (Test Source or Folders; Shown AS
). Comparative source roots and similar but wherein the code is prepared for testing. -
Test Source Roots the Generated (Test Generated Source or Folders; Shown AS
; Certain views in The [Generated] Used text marker IS) Test source roots and the like. The difference with the difference Source roots and Generated source roots are the same. -
Roots Resource (or Resource Folders; Shown AS
; the Available only in the Java modules) which includes a variety of resource files used by the project. Such as pictures, multiple xml files and file attributes.During the build process, all the contents of the resource folders are copied to the output folder as is.Similarly to sources, you can specify that your resources are generated. You can also specify which folder within the output folder your resources should be copied to. -
Resource Roots the Test (or the Test Resource Folders; Shown AS
; the Available only in the Java modules) required for the test resource file. In some ways, like folders and resource. -
Roots Excluded (Shown AS
) is almost negligible IntelliJ IDEA file.