Type Parameters:
K - the type of keys maintained by this map
V - the type of mapped values
All Superinterfaces:
Map<K,V>
All Known Subinterfaces:
ConcurrentNavigableMap<K,V>, NavigableMap<K,V>, SortedMap<K,V>
All Known Implementing Classes:
ConcurrentSkipListMap, LinkedHashMap, TreeMap

  • Nested Class Summary

    Nested classes/interfaces declared in interface Map

    Map.Entry<K,V>

    static interface 

    A map entry (key-value pair).

  • Method Summary

    Returns the first key-value mapping in this map, or null if the map is empty.

    lastEntry()

    Returns the last key-value mapping in this map, or null if the map is empty.

    Removes and returns the first key-value mapping in this map, or null if the map is empty (optional operation).

    Removes and returns the last key-value mapping in this map, or null if the map is empty (optional operation).

    default V

    putFirst(K k, V v)

    Inserts the given mapping into the map if it is not already present, or replaces the value of a mapping if it is already present (optional operation).

    default V

    putLast(K k, V v)

    Inserts the given mapping into the map if it is not already present, or replaces the value of a mapping if it is already present (optional operation).

    reversed()

    Returns a reverse-ordered view of this map.

    Returns a SequencedSet view of this map's entrySet.

    Returns a SequencedSet view of this map's keySet.

    Returns a SequencedCollection view of this map's values collection.

    Methods declared in interface Map

    clear, compute, computeIfAbsent, computeIfPresent, containsKey, containsValue, entrySet, equals, forEach, get, getOrDefault, hashCode, isEmpty, keySet, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, replaceAll, size, values

    void

    Removes all of the mappings from this map (optional operation).

    default V

    compute(K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction)

    Attempts to compute a mapping for the specified key and its current mapped value, or null if there is no current mapping (optional operation).

    default V

    If the specified key is not already associated with a value (or is mapped to null), attempts to compute its value using the given mapping function and enters it into this map unless null (optional operation).

    default V

    If the value for the specified key is present and non-null, attempts to compute a new mapping given the key and its current mapped value (optional operation).

    boolean

    Returns true if this map contains a mapping for the specified key.

    boolean

    Returns true if this map maps one or more keys to the specified value.

    Returns a Set view of the mappings contained in this map.

    boolean

    Compares the specified object with this map for equality.

    default void

    Performs the given action for each entry in this map until all entries have been processed or the action throws an exception.

    Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.

    default V

    Returns the value to which the specified key is mapped, or defaultValue if this map contains no mapping for the key.

    int

    Returns the hash code value for this map.

    boolean

    Returns true if this map contains no key-value mappings.

    Returns a Set view of the keys contained in this map.

    default V

    merge(K key, V value, BiFunction<? super V, ? super V, ? extends V> remappingFunction)

    If the specified key is not already associated with a value or is associated with null, associates it with the given non-null value (optional operation).

    put(K key, V value)

    Associates the specified value with the specified key in this map (optional operation).

    void

    putAll(Map<? extends K, ? extends V> m)

    Copies all of the mappings from the specified map to this map (optional operation).

    default V

    If the specified key is not already associated with a value (or is mapped to null) associates it with the given value and returns null, else returns the current value (optional operation).

    Removes the mapping for a key from this map if it is present (optional operation).

    default boolean

    Removes the entry for the specified key only if it is currently mapped to the specified value (optional operation).

    default V

    Replaces the entry for the specified key only if it is currently mapped to some value (optional operation).

    default boolean

    replace(K key, V oldValue, V newValue)

    Replaces the entry for the specified key only if currently mapped to the specified value (optional operation).

    default void

    Replaces each entry's value with the result of invoking the given function on that entry until all entries have been processed or the function throws an exception (optional operation).

    int

    Returns the number of key-value mappings in this map.

    Returns a Collection view of the values contained in this map.

  • Method Details

    • reversed

    • firstEntry

    • lastEntry

    • pollFirstEntry

    • pollLastEntry

    • putFirst

    • putLast

    • sequencedKeySet

    • sequencedValues

    • sequencedEntrySet