java - Eclipse compilation error: The hierarchy of the type 'Class name' is inconsistent

Question

I have downloaded some open source software written in Java and tried to compile it using Eclipse. I got the error: "The hierarchy of the type 'Class name' is inconsistent" in some files. What causes these errors and how do I fix them?

Answer 1

It means you are trying to implement a non-existing interface or you're extending an non-existing class.

Try to refresh your Eclipse.

If it doesn't work, it may mean that you have a reference to a JAR that is not in the build path. Check your project's classpath and verify that the jar containing the interface or the class is in it.