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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