Eclipse JUnit - possible causes of seeing “initializationError” in Eclipse window

Question

I know this question is pretty general but I haven\'t found any hints on why this error may show up. What are possible causes of seeing initalizationError in Eclips

Answer 1

For me it was a missing static keyword in one of the JUnit annotated methods, e.g.:

@AfterClass
public static void cleanUp() {
    // ...
}