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

In this program, it is impossible for the compiler to know what actually is stored in the collection. In the first one, generics is not used. I don't understand generics beyond the basic uses and thus can't make much sense of that. Head First Java 16 Data Structures: collections and generics Page 529 to 579. Would that be "Java Generics and Collections" (oreilly.com/catalog/9780596527754)? It is however important to remember a few simple rules. The book in question is - Java Generics and Collections, by Maurice Naftalin and Philip Wadler from O'Reilly Media. This is one of the first books on the Java Generics and Collections libraries. We are using java collection API to store and retrieve objects. List is a subtype of Collection . Java Generics may seem quite intimidating but it is not really that hard. 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. I recently wrote a blog entry about reluctantly accepting Java Generics.