About Question enthuware.ocpjp.v7.2.1724 :
Posted: Wed Apr 15, 2015 7:43 am
In the explanation part it might worth to mention that here in fact the overloaded version of Collections.sort() is used, which gets a Comparator as a second parameter (in this case value null, that would mean natural ordering). The one-argument version of sort() would not even compile with an Object[] array converted to List