Eclipse: The resource is not on the build path of a Java project

Question

I have been given a Source Folder (src) of a Java Project. I have created a .project file, kept it inside that folder and imported that Project int

Answer 1

Refactor the name of the folder src/main/resource to src/main/java.

Right click the project > Build Path > Use Source Folder.

Answer 2

If you imported a project from external source with pom.xml after import, go to Project->Properties->Maven and enable Java EE - This will resolve the error

Answer 3

Recently I met a similar problem. when importing a project without .project, a default empty .project generated without builders. here is an example to make it work.

<buildSpec>
    <buildCommand>
            <name>org.eclipse.jdt.core.javabuilder</name>
        <arguments>
        </arguments>
    </buildCommand>
</buildSpec>
<natures>
    <nature>org.eclipse.jdt.core.javanature</nature>
</natures>

Answer 4

You can add the src folder to build path by:

1. Select Java perspective.
2. Right click on src folder.
3. Select Build Path > Use a source folder.

And you are done. Hope this help.

EDIT: Refer to the Eclipse documentation

Answer 5

I found similar issue and fixed it by correcting .project file. For java project .project file must have below tag within natures

org.eclipse.jdt.core.javanature

---

Example of complete .project file

<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
    <name>SampleProjectName</name>
    <comment></comment>
    <projects>
    </projects>
    <buildSpec>
        <buildCommand>
            <name>org.maven.ide.eclipse.maven2Builder</name>
            <arguments>
            </arguments>
        </buildCommand>
        <buildCommand>
            <name>oracle.eclipse.tools.weblogic.sharedLibraryFrameworkValidator</name>
            <arguments>
            </arguments>
        </buildCommand>
    </buildSpec>
    <natures>
        <nature>org.eclipse.jdt.core.javanature</nature>
    </natures>
</projectDescription>

Answer 6

Looks like you created your Java class under src/main/resources instead of src/main/java