Class

Class name prefixed with package name  

Reports classes whose names are prefixed with their package names, ignoring differences in capitalization.

Class name same as ancestor name  

Reports classes that have the same name as one of their superclasses, while their fully qualified names remain different.

Class naming convention  

Reports classes whose names are too short, too long, or do not follow the specified regular expression pattern.

Exception class name does not end with 'Exception'  

Reports exception classes whose names don't end with Exception.

Non-exception class name ends with 'Exception'  

Reports non-exception classes whose names end with Exception.