Package org.apache.commons.collections4

Interface Get<K,V>

Type Parameters:
K - the type of the keys in this map
V - the type of the values in this map
All Known Subinterfaces:
BidiMap<K,V>, BoundedMap<K,V>, IterableGet<K,V>, IterableMap<K,V>, IterableSortedMap<K,V>, MultiMap<K,V>, OrderedBidiMap<K,V>, OrderedMap<K,V>, SortedBidiMap<K,V>, Trie<K,V>
All Known Implementing Classes:
AbstractBidiMapDecorator, AbstractBitwiseTrie, AbstractDualBidiMap, AbstractHashedMap, AbstractIterableGetMapDecorator, AbstractIterableMap, AbstractLinkedMap, AbstractMapDecorator, AbstractOrderedBidiMapDecorator, AbstractOrderedMapDecorator, AbstractPatriciaTrie, AbstractReferenceMap, AbstractSortedBidiMapDecorator, AbstractSortedMapDecorator, CaseInsensitiveMap, CompositeMap, DefaultedMap, DualHashBidiMap, DualLinkedHashBidiMap, DualTreeBidiMap, DualTreeBidiMap.ViewMap, FixedSizeMap, FixedSizeSortedMap, Flat3Map, HashedMap, LazyMap, LazySortedMap, LinkedMap, ListOrderedMap, LRUMap, MultiKeyMap, MultiValueMap, PassiveExpiringMap, PatriciaTrie, PredicatedMap, PredicatedSortedMap, ReferenceIdentityMap, ReferenceMap, SingletonMap, StaticBucketMap, TransformedMap, TransformedSortedMap, TransformedSplitMap, TreeBidiMap, UnmodifiableBidiMap, UnmodifiableMap, UnmodifiableOrderedBidiMap, UnmodifiableOrderedMap, UnmodifiableSortedBidiMap, UnmodifiableSortedMap, UnmodifiableTrie
public interface Get<K,V>
The "read" subset of the Map interface.
Since:
4.0
See Also:

  • Method Details

    • containsKey

      boolean containsKey(Object key)
      Parameters:
      key - key whose presence in this map is to be tested
      Returns:
      true if this map contains a mapping for the specified key
      See Also:

    • containsValue

      boolean containsValue(Object value)
      Parameters:
      value - value whose presence in this map is to be tested
      Returns:
      true if this map maps one or more keys to the specified value
      See Also:

    • entrySet

      Set<Map.Entry<K,V>> entrySet()
      Returns:
      a set view of the mappings contained in this map
      See Also:

    • get

      V get(Object key)
      Parameters:
      key - the key whose associated value is to be returned
      Returns:
      the value to which the specified key is mapped, or null if this map contains no mapping for the key
      See Also:

    • isEmpty

      boolean isEmpty()
      Returns:
      true if this map contains no key-value mappings
      See Also:

    • keySet

      Set<K> keySet()
      Returns:
      a set view of the keys contained in this map
      See Also:

    • remove

      V remove(Object key)
      Parameters:
      key - key whose mapping is to be removed from the map
      Returns:
      the previous value associated with key, or null if there was no mapping for key.
      See Also:

    • size

      int size()
      Returns:
      the number of key-value mappings in this map
      See Also:

    • values

      Collection<V> values()
      Returns:
      a collection view of the values contained in this map
      See Also: