Uses of Interface java.util.NavigableMap (Java SE 12 & JDK 12 )

## Uses of Interface
java.util.NavigableMap

- Packages that use NavigableMap
  Package | Description
  --- | ---
  java.time.zone | Support for time-zones and their rules.
  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 NavigableMap in java.time.zone

    Methods in java.time.zone that return NavigableMap
    Modifier and Type | Method | Description
    --- | --- | ---
    `static NavigableMap<String,​ZoneRules>` | ZoneRulesProvider.`getVersions​(String zoneId)` | Gets the history of rules for the zone ID.
    `protected abstract NavigableMap<String,​ZoneRules>` | ZoneRulesProvider.`provideVersions​(String zoneId)` | SPI method to get the history of rules for the zone ID.

  - ### Uses of NavigableMap in java.util

    Classes in java.util that implement NavigableMap
    Modifier and Type | Class | Description
    --- | --- | ---
    `class` | `TreeMap<K,​V>` | A Red-Black tree based `NavigableMap` implementation.

    Methods in java.util that return NavigableMap
    Modifier and Type | Method | Description
    --- | --- | ---
    `static <K,​V> NavigableMap<K,​V>` | Collections.`checkedNavigableMap​(NavigableMap<K,​V> m, Class<K> keyType, Class<V> valueType)` | Returns a dynamically typesafe view of the specified navigable map.
    `NavigableMap<K,​V>` | NavigableMap.`descendingMap()` | Returns a reverse order view of the mappings contained in this map.
    `NavigableMap<K,​V>` | TreeMap.`descendingMap()` |
    `static <K,​V> NavigableMap<K,​V>` | Collections.`emptyNavigableMap()` | Returns an empty navigable map (immutable).
    `NavigableMap<K,​V>` | NavigableMap.`headMap​(K toKey, boolean inclusive)` | Returns a view of the portion of this map whose keys are less than (or equal to, if `inclusive` is true) `toKey`.
    `NavigableMap<K,​V>` | TreeMap.`headMap​(K toKey, boolean inclusive)` |
    `NavigableMap<K,​V>` | NavigableMap.`subMap​(K fromKey, boolean fromInclusive, K toKey, boolean toInclusive)` | Returns a view of the portion of this map whose keys range from `fromKey` to `toKey`.
    `NavigableMap<K,​V>` | TreeMap.`subMap​(K fromKey, boolean fromInclusive, K toKey, boolean toInclusive)` |
    `static <K,​V> NavigableMap<K,​V>` | Collections.`synchronizedNavigableMap​(NavigableMap<K,​V> m)` | Returns a synchronized (thread-safe) navigable map backed by the specified navigable map.
    `NavigableMap<K,​V>` | NavigableMap.`tailMap​(K fromKey, boolean inclusive)` | Returns a view of the portion of this map whose keys are greater than (or equal to, if `inclusive` is true) `fromKey`.
    `NavigableMap<K,​V>` | TreeMap.`tailMap​(K fromKey, boolean inclusive)` |
    `static <K,​V> NavigableMap<K,​V>` | Collections.`unmodifiableNavigableMap​(NavigableMap<K,​? extends V> m)` | Returns an unmodifiable view of the specified navigable map.

    Methods in java.util with parameters of type NavigableMap
    Modifier and Type | Method | Description
    --- | --- | ---
    `static <K,​V> NavigableMap<K,​V>` | Collections.`checkedNavigableMap​(NavigableMap<K,​V> m, Class<K> keyType, Class<V> valueType)` | Returns a dynamically typesafe view of the specified navigable map.
    `static <K,​V> NavigableMap<K,​V>` | Collections.`synchronizedNavigableMap​(NavigableMap<K,​V> m)` | Returns a synchronized (thread-safe) navigable map backed by the specified navigable map.
    `static <K,​V> NavigableMap<K,​V>` | Collections.`unmodifiableNavigableMap​(NavigableMap<K,​? extends V> m)` | Returns an unmodifiable view of the specified navigable map.

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

    Subinterfaces of NavigableMap in java.util.concurrent
    Modifier and Type | Interface | Description
    --- | --- | ---
    `interface` | `ConcurrentNavigableMap<K,​V>` | A `ConcurrentMap` supporting `NavigableMap` operations, and recursively so for its navigable sub-maps.

    Classes in java.util.concurrent that implement NavigableMap
    Modifier and Type | Class | Description
    --- | --- | ---
    `class` | `ConcurrentSkipListMap<K,​V>` | A scalable concurrent `ConcurrentNavigableMap` implementation.