Java Generics and Collections Maurice Naftalin Maurice, Philip Wadler
Publisher: O'Reilly Media

Extends User> users){} but I cannot instantiate that same List in a similar way? For more information refer to Java Collections. Suppose you have Java classes The answer to this riddle is that Java is designed to work with all kinds of generic classes, not just those which are collection-like. Extends User> alist = new ArrayList