## Uses of Class
java.util.AbstractSet

- Packages that use AbstractSet
  Package | Description
  --- | ---
  java.util | Contains the collections framework, legacy collection classes, event model, date and time facilities, internationalization, and miscellaneous utility classes (a string tokenizer, a random-number generator, and a bit array).
  java.util.concurrent | Utility classes commonly useful in concurrent programming.
  javax.print.attribute.standard | Package javax.print.attribute.standard contains classes for specific printing attributes.

- - ### Uses of AbstractSet in java.util

    Subclasses of AbstractSet in java.util
    Modifier and Type | Class and Description
    --- | ---
    `class` | `EnumSet<E extends Enum<E>>` A specialized `Set` implementation for use with enum types.
    `class` | `HashSet<E>` This class implements the `Set` interface, backed by a hash table (actually a `HashMap` instance).
    `class` | `LinkedHashSet<E>` Hash table and linked list implementation of the `Set` interface, with predictable iteration order.
    `class` | `TreeSet<E>` A `NavigableSet` implementation based on a `TreeMap`.

  - ### Uses of AbstractSet in java.util.concurrent

    Subclasses of AbstractSet in java.util.concurrent
    Modifier and Type | Class and Description
    --- | ---
    `class` | `ConcurrentSkipListSet<E>` A scalable concurrent `NavigableSet` implementation based on a `ConcurrentSkipListMap`.
    `class` | `CopyOnWriteArraySet<E>` A `Set` that uses an internal `CopyOnWriteArrayList` for all of its operations.

  - ### Uses of AbstractSet in javax.print.attribute.standard

    Subclasses of AbstractSet in javax.print.attribute.standard
    Modifier and Type | Class and Description
    --- | ---
    `class` | `JobStateReasons` Class JobStateReasons is a printing attribute class, a set of enumeration values, that provides additional information about the job's current state, i.e., information that augments the value of the job's `JobState` attribute.

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