List<Class> classes =
dirs.stream().flatMap((File d) -> findClasses(d, packageName).stream()).collect(Collectors.toList());
for(Class cls: classes) {
if (cls.isAnnotationPresent(YourAnnotation.class)) {
YourAnnotation annotation = (YourAnnotation) cls.getAnnotation(YourAnnotation.class);
System.out.println(annotation.value());
}
}