Java How to Program, Early Objects, 11th Edition

16.5 Interface Collection and Class Collections

Interface Collection contains bulk operations (i.e., operations performed on an entire collection) for operations such as adding, clearing and comparing objects (or elements) in a collection. A Collection can also be converted to an array. In addition, interface Collection provides a method that returns an Iterator object, which allows a program to walk through the collection and remove elements from it during the iteration. We discuss class Iterator in Section 16.6.1. Other methods of interface Collection enable a program to determine a collection’s size and whether a collection is empty.

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