Maven suddenly wants src / instead of src / main / java

Question

I am using Maven 3.3.3 along with Eclipse Mars and m2e. Yesterday I created a new Java project and converted it to Maven.

Subsequently, the class path contained only src instead of the standard src/main/java . I was surprised, but I just created the missing folders and ran the m2e "Update Project". This did not solve the problem; m2e still insisted on using only src .

So, I edited the class path manually, as a result I got the usual

 src/test/java src/test/resources src/main/java src/main/resources 

When I try m2e "Update project", I get this error:

 Cannot nest 'foo/src/test/java' inside 'foo/src'. To enable the nesting, exclude 'test/' from 'foo/src' 

sigh I went to the following command line and ran mvn eclipse:eclipse to get this classpath:

 src/test/java src/test/resources src src/main/resources 

Now I am completely at a dead end. Why is this happening?

Answer 1

Open POM in the POM editor and click on the "Effective POM" tab. Find sourceDirectory . You will probably see something like this:

 <sourceDirectory>src</sourceDirectory> 

When you first converted your Java project to Maven, m2e tried to keep the class path the same. Eclipse Java projects have a different layout by default. They use src/ instead of src/main/java/ . There is no test folder, because Eclipse projects usually put their tests in another project.

To fix the problem:

• Remove the sourceDirectory element from the POM (Note: it may be in the parent POM).
• Go to the project
• Select all source folders
• Remove them from the build path (context menu → Build path → Remove from build path).
• Refresh Project

The error should now disappear, and the class path will be correct.

Answer 2

There are two types of folders that you can create: 1) Package 2) Source folder

1) The package looks like this:

To create a package, right-click the desired folder (in my example, I right-click on Java resources) -> Create -> Package

A popup will appear that looks like this:

"Source folder:" Here you select your project. If you don’t see anything there, click "Browse ..." and find your project. If I click "Browse ...", it will show the following:

"Name:" is the name you will give your package.

Note. Packages should be in source folders. The source folders are the parent folder.

2) The source folders look like this:

To create the source folder, right-click the desired folder (in my example, I right-click on Java resources) → Create → Source folder

In the "Project Name:" section, enter a name for the project. If you need help, click "Browse ..."

In the "Folder Name:" section, enter the desired folder name.

Error: if you try to create the folder "src / main / resources" and you run this error "Unable to insert" the project name inside the "ProjectName". To enable nesting exception 'main / from

Decision: