No, Cocoa/Objective-C doesn't offer typed collections like this. All objects in the collection must inherit from NSObject (which is basically everything besides primitives and structs), but beyond that, it's up to you to understand/manage what is going on in the array. Objects in an NSMutableArray are represented in its interface by the generic type id.
From a design standpoint, collections in Cocoa typically do contain homogeneously-typed objects. The name of the array is often used to indicate what's inside it (just as in Java), e.g. bookTitlesArray or just bookTitles (i.e. strings). Additionally, from an abstraction standpoint, sometimes lightweight classes are used to "wrap" a raw NSMutableArray to enforce type checking at the interface. As in, a new class called BookTitleList which offered a subset of the add, lookup, remove methods and passed them through to an internal array after e.g. validation. But YMMV depending on your needs.
