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

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

    SampleProjectName
    
    
    
    
        
            org.maven.ide.eclipse.maven2Builder
            
            
        
        
            oracle.eclipse.tools.weblogic.sharedLibraryFrameworkValidator
            
            
        
    
    
        org.eclipse.jdt.core.javanature