Uses of Interface java.util.SortedSet (Java Platform SE 8 )
Date: 2026-04-24

## Uses of Interface
java.util.SortedSet

- Packages that use SortedSet
  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.

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

    Subinterfaces of SortedSet in java.util
    Modifier and Type | Interface and Description
    --- | ---
    `interface` | `NavigableSet<E>` A `SortedSet` extended with navigation methods reporting closest matches for given search targets.

    Classes in java.util that implement SortedSet
    Modifier and Type | Class and Description
    --- | ---
    `class` | `TreeSet<E>` A `NavigableSet` implementation based on a `TreeMap`.

    Methods in java.util that return SortedSet
    Modifier and Type | Method and Description
    --- | ---
    `static <E> SortedSet<E>` | Collections.`checkedSortedSet(SortedSet<E> s, Class<E> type)` Returns a dynamically typesafe view of the specified sorted set.
    `static <E> SortedSet<E>` | Collections.`emptySortedSet()` Returns an empty sorted set (immutable).
    `SortedSet<E>` | NavigableSet.`headSet(E toElement)` Returns a view of the portion of this set whose elements are strictly less than `toElement`.
    `SortedSet<E>` | SortedSet.`headSet(E toElement)` Returns a view of the portion of this set whose elements are strictly less than `toElement`.
    `SortedSet<E>` | TreeSet.`headSet(E toElement)`
    `SortedSet<E>` | NavigableSet.`subSet(E fromElement, E toElement)` Returns a view of the portion of this set whose elements range from `fromElement`, inclusive, to `toElement`, exclusive.
    `SortedSet<E>` | SortedSet.`subSet(E fromElement, E toElement)` Returns a view of the portion of this set whose elements range from `fromElement`, inclusive, to `toElement`, exclusive.
    `SortedSet<E>` | TreeSet.`subSet(E fromElement, E toElement)`
    `static <T> SortedSet<T>` | Collections.`synchronizedSortedSet(SortedSet<T> s)` Returns a synchronized (thread-safe) sorted set backed by the specified sorted set.
    `SortedSet<E>` | NavigableSet.`tailSet(E fromElement)` Returns a view of the portion of this set whose elements are greater than or equal to `fromElement`.
    `SortedSet<E>` | SortedSet.`tailSet(E fromElement)` Returns a view of the portion of this set whose elements are greater than or equal to `fromElement`.
    `SortedSet<E>` | TreeSet.`tailSet(E fromElement)`
    `static <T> SortedSet<T>` | Collections.`unmodifiableSortedSet(SortedSet<T> s)` Returns an unmodifiable view of the specified sorted set.

    Methods in java.util with parameters of type SortedSet
    Modifier and Type | Method and Description
    --- | ---
    `static <E> SortedSet<E>` | Collections.`checkedSortedSet(SortedSet<E> s, Class<E> type)` Returns a dynamically typesafe view of the specified sorted set.
    `static <T> SortedSet<T>` | Collections.`synchronizedSortedSet(SortedSet<T> s)` Returns a synchronized (thread-safe) sorted set backed by the specified sorted set.
    `static <T> SortedSet<T>` | Collections.`unmodifiableSortedSet(SortedSet<T> s)` Returns an unmodifiable view of the specified sorted set.

    Constructors in java.util with parameters of type SortedSet
    Constructor and Description
    `PriorityQueue(SortedSet<? extends E> c)` Creates a `PriorityQueue` containing the elements in the specified sorted set.
    `TreeSet(SortedSet<E> s)` Constructs a new tree set containing the same elements and using the same ordering as the specified sorted set.

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

    Classes in java.util.concurrent that implement SortedSet
    Modifier and Type | Class and Description
    --- | ---
    `class` | `ConcurrentSkipListSet<E>` A scalable concurrent `NavigableSet` implementation based on a `ConcurrentSkipListMap`.

    Constructors in java.util.concurrent with parameters of type SortedSet
    Constructor and Description
    `ConcurrentSkipListSet(SortedSet<E> s)` Constructs a new set containing the same elements and using the same ordering as the specified sorted set.

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