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

Generics are an oddly-named thing in Java that associate objects stored in a Collection with a particular type. Arrays behave differently from the collections because arrays are covariant by default, which means that S[] is a subtype of T[] whenever S is a subtype of T, where as Generics does not support covariance. Generics in Java is one of those features where almost everyone uses but very people, including myself, really understand. List is a subtype of Collection . Many avoid it interface Collection { public boolean addAll(Collection