## Uses of Class
java.util.AbstractSet

- Packages that use AbstractSet
  Package | Description
  --- | ---
  java.util | Contains the collections framework, some internationalization support classes, a service loader, properties, random number generation, string parsing and scanning classes, base64 encoding and decoding, a bit array, and several miscellaneous utility classes.
  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 | 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 | 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 | 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.