# 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 well-defined encounter 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
  `final 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.