Error: Could not find or load main class

Solutions :

Same Problem occur with me once below are the steps i follow.


Solution 1 :

• I went to project > properties > javaBuildPath.
• There In order of export , I moved up my java/main to the top priority.

Solution 2 :

• Go to run configurations: - run->run configurations
• In the Classpath tab: Select Advanced
• Add where Eclipse usually put the *.class for the projects, which is in bin. So I added the bin directory for the project.

Solution 3 :

• Project -> Clean
• Make sure Project -> Build automatically is active
• Project -> Properties -> Java Build Path -> Libraries: Remove any external libs you have ever added. Don't remove standard libraries like the JRE System Library.
• Try to run your main class now. The "class could not be found / load" error should be gone. Try adding your external libs/jars one after each other.