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Understand the error
This error occurs when the project created by you is not a java project in eclipse. If you try to add new java class to such project then "Source folder is not a Java Project error" occurs.[Fixed] Error : Source folder is not a Java Project
1. Right click on your project and select "Properties"2. In Properties, click on "Project Facets"
3. Then click on "Convert to faceted form..."
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4. Then select "Java"
5. Click on "Apply and Ok"
Yayy!! This will resolve the error "Source folder is not a Java Project". Please mention in the comments if you have any questions.
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