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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..."
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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