16.2 Collections Overview
A collection is a data structure—actually, an object—that can hold references to other objects. Usually, collections contain references to objects of any type that has the is-a relationship with the collection’s element type. The collections-framework interfaces declare the operations to be performed generically on various types of collections. Figure 16.1 lists some of the collections-framework interfaces. Several implementations of these interfaces are provided within the framework. You may also provide your own implementations.
Fig. 16.1
| Interface | Description |
|---|---|
Collection |
The root interface in the collections hierarchy from which interfaces Set,
Queue and List are derived. |
Set |
A collection that does not contain ... |
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