This week's book giveaways are in the iOS and Features new in Java 8 forums. We're giving away four copies each of Barcodes with iOS: Bringing together the digital and physical worlds and Core Java for the Impatient and have the authors on-line! See this thread and this one for details.
A primitive array is indeed an Object, so you can clone() it, get a hashCode() for it, etc. java.util.Arrays is a separate class; note that all its methods are static. They are handy when working with arrays, but they're not methods you can call on arrays directly.