The comment before the Test annotation declaration says, “Use only on parameterless static methods.” It would be nice if the compiler could enforce this, but it can’t, unless you write an annotation processor to do so. For more on this topic, see the documentation for javax.annotation.processing. In the absence of such an annotation processor, if you put a Test annotation on the declaration of an instance method or on a method with one or more parameters, the test program will still compile, leaving it to the testing tool to deal with the problem at runtime.
