Uses of Interface java.util.SortedMap (Java Platform SE 8 )
Date: 2026-04-22

## Uses of Interface
java.util.SortedMap

- Packages that use SortedMap
  Package | Description
  --- | ---
  java.nio.charset | Defines charsets, decoders, and encoders, for translating between bytes and Unicode characters.
  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.
  java.util.jar | Provides classes for reading and writing the JAR (Java ARchive) file format, which is based on the standard ZIP file format with an optional manifest file.

- - ### Uses of SortedMap in java.nio.charset

    Methods in java.nio.charset that return SortedMap
    Modifier and Type | Method and Description
    --- | ---
    `static SortedMap<String,Charset>` | Charset.`availableCharsets()` Constructs a sorted map from canonical charset names to charset objects.

  - ### Uses of SortedMap in java.util

    Subinterfaces of SortedMap in java.util
    Modifier and Type | Interface and Description
    --- | ---
    `interface` | `NavigableMap<K,V>` A `SortedMap` extended with navigation methods returning the closest matches for given search targets.

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

    Methods in java.util that return SortedMap
    Modifier and Type | Method and Description
    --- | ---
    `static <K,V> SortedMap<K,V>` | Collections.`checkedSortedMap(SortedMap<K,V> m, Class<K> keyType, Class<V> valueType)` Returns a dynamically typesafe view of the specified sorted map.
    `static <K,V> SortedMap<K,V>` | Collections.`emptySortedMap()` Returns an empty sorted map (immutable).
    `SortedMap<K,V>` | TreeMap.`headMap(K toKey)`
    `SortedMap<K,V>` | NavigableMap.`headMap(K toKey)` Returns a view of the portion of this map whose keys are strictly less than `toKey`.
    `SortedMap<K,V>` | SortedMap.`headMap(K toKey)` Returns a view of the portion of this map whose keys are strictly less than `toKey`.
    `SortedMap<K,V>` | TreeMap.`subMap(K fromKey, K toKey)`
    `SortedMap<K,V>` | NavigableMap.`subMap(K fromKey, K toKey)` Returns a view of the portion of this map whose keys range from `fromKey`, inclusive, to `toKey`, exclusive.
    `SortedMap<K,V>` | SortedMap.`subMap(K fromKey, K toKey)` Returns a view of the portion of this map whose keys range from `fromKey`, inclusive, to `toKey`, exclusive.
    `static <K,V> SortedMap<K,V>` | Collections.`synchronizedSortedMap(SortedMap<K,V> m)` Returns a synchronized (thread-safe) sorted map backed by the specified sorted map.
    `SortedMap<K,V>` | TreeMap.`tailMap(K fromKey)`
    `SortedMap<K,V>` | NavigableMap.`tailMap(K fromKey)` Returns a view of the portion of this map whose keys are greater than or equal to `fromKey`.
    `SortedMap<K,V>` | SortedMap.`tailMap(K fromKey)` Returns a view of the portion of this map whose keys are greater than or equal to `fromKey`.
    `static <K,V> SortedMap<K,V>` | Collections.`unmodifiableSortedMap(SortedMap<K,? extends V> m)` Returns an unmodifiable view of the specified sorted map.

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

    Constructors in java.util with parameters of type SortedMap
    Constructor and Description
    `TreeMap(SortedMap<K,? extends V> m)` Constructs a new tree map containing the same mappings and using the same ordering as the specified sorted map.

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

    Subinterfaces of SortedMap in java.util.concurrent
    Modifier and Type | Interface and 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 SortedMap
    Modifier and Type | Class and Description
    --- | ---
    `class` | `ConcurrentSkipListMap<K,V>` A scalable concurrent `ConcurrentNavigableMap` implementation.

    Constructors in java.util.concurrent with parameters of type SortedMap
    Constructor and Description
    `ConcurrentSkipListMap(SortedMap<K,? extends V> m)` Constructs a new map containing the same mappings and using the same ordering as the specified sorted map.

  - ### Uses of SortedMap in java.util.jar

    Methods in java.util.jar that return SortedMap
    Modifier and Type | Method and Description
    --- | ---
    `SortedMap<String,String>` | Pack200.Packer.`properties()` Get the set of this engine's properties.
    `SortedMap<String,String>` | Pack200.Unpacker.`properties()` Get the set of this engine's properties.

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