## Uses of Interface
java.util.NavigableSet

- Packages that use NavigableSet
  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.

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

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

    Methods in java.util that return NavigableSet
    Modifier and Type | Method | Description
    --- | --- | ---
    `static <E> NavigableSet<E>` | Collections.`checkedNavigableSet​(NavigableSet<E> s, Class<E> type)` | Returns a dynamically typesafe view of the specified navigable set.
    `NavigableSet<K>` | NavigableMap.`descendingKeySet()` | Returns a reverse order `NavigableSet` view of the keys contained in this map.
    `NavigableSet<K>` | TreeMap.`descendingKeySet()` |
    `NavigableSet<E>` | NavigableSet.`descendingSet()` | Returns a reverse order view of the elements contained in this set.
    `NavigableSet<E>` | TreeSet.`descendingSet()` |
    `static <E> NavigableSet<E>` | Collections.`emptyNavigableSet()` | Returns an empty navigable set (immutable).
    `NavigableSet<E>` | NavigableSet.`headSet​(E toElement, boolean inclusive)` | Returns a view of the portion of this set whose elements are less than (or equal to, if `inclusive` is true) `toElement`.
    `NavigableSet<E>` | TreeSet.`headSet​(E toElement, boolean inclusive)` |
    `NavigableSet<K>` | NavigableMap.`navigableKeySet()` | Returns a `NavigableSet` view of the keys contained in this map.
    `NavigableSet<K>` | TreeMap.`navigableKeySet()` |
    `NavigableSet<E>` | NavigableSet.`subSet​(E fromElement, boolean fromInclusive, E toElement, boolean toInclusive)` | Returns a view of the portion of this set whose elements range from `fromElement` to `toElement`.
    `NavigableSet<E>` | TreeSet.`subSet​(E fromElement, boolean fromInclusive, E toElement, boolean toInclusive)` |
    `static <T> NavigableSet<T>` | Collections.`synchronizedNavigableSet​(NavigableSet<T> s)` | Returns a synchronized (thread-safe) navigable set backed by the specified navigable set.
    `NavigableSet<E>` | NavigableSet.`tailSet​(E fromElement, boolean inclusive)` | Returns a view of the portion of this set whose elements are greater than (or equal to, if `inclusive` is true) `fromElement`.
    `NavigableSet<E>` | TreeSet.`tailSet​(E fromElement, boolean inclusive)` |
    `static <T> NavigableSet<T>` | Collections.`unmodifiableNavigableSet​(NavigableSet<T> s)` | Returns an unmodifiable view of the specified navigable set.

    Methods in java.util with parameters of type NavigableSet
    Modifier and Type | Method | Description
    --- | --- | ---
    `static <E> NavigableSet<E>` | Collections.`checkedNavigableSet​(NavigableSet<E> s, Class<E> type)` | Returns a dynamically typesafe view of the specified navigable set.
    `static <T> NavigableSet<T>` | Collections.`synchronizedNavigableSet​(NavigableSet<T> s)` | Returns a synchronized (thread-safe) navigable set backed by the specified navigable set.
    `static <T> NavigableSet<T>` | Collections.`unmodifiableNavigableSet​(NavigableSet<T> s)` | Returns an unmodifiable view of the specified navigable set.

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

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

    Methods in java.util.concurrent that return NavigableSet
    Modifier and Type | Method | Description
    --- | --- | ---
    `NavigableSet<K>` | ConcurrentNavigableMap.`descendingKeySet()` | Returns a reverse order `NavigableSet` view of the keys contained in this map.
    `NavigableSet<E>` | ConcurrentSkipListSet.`descendingSet()` | Returns a reverse order view of the elements contained in this set.
    `NavigableSet<E>` | ConcurrentSkipListSet.`headSet​(E toElement)` |
    `NavigableSet<E>` | ConcurrentSkipListSet.`headSet​(E toElement, boolean inclusive)` |
    `NavigableSet<K>` | ConcurrentNavigableMap.`keySet()` | Returns a `NavigableSet` view of the keys contained in this map.
    `NavigableSet<K>` | ConcurrentSkipListMap.`keySet()` | Returns a `NavigableSet` view of the keys contained in this map.
    `NavigableSet<K>` | ConcurrentNavigableMap.`navigableKeySet()` | Returns a `NavigableSet` view of the keys contained in this map.
    `NavigableSet<E>` | ConcurrentSkipListSet.`subSet​(E fromElement, boolean fromInclusive, E toElement, boolean toInclusive)` |
    `NavigableSet<E>` | ConcurrentSkipListSet.`subSet​(E fromElement, E toElement)` |
    `NavigableSet<E>` | ConcurrentSkipListSet.`tailSet​(E fromElement)` |
    `NavigableSet<E>` | ConcurrentSkipListSet.`tailSet​(E fromElement, boolean inclusive)` |