Top Description Methods

org.apache.commons.collections4

public Interface Get<K, V>

Known Direct Subinterfaces

org.apache.commons.collections4.IterableGet

Type Parameters

<K>: the type of the keys in this map
<V>: the type of the values in this map

Imports

java.util.Collection, .Set

The "read" subset of the java.util.Map interface.

Since: 4.0
See Also: Put

Method Summary

Modifier and Type	Method and Description
public boolean	Returns: `true` if this map contains a mapping for the specified key containsKey(Object key whose presence in this map is to be tested key)
public boolean	Returns: `true` if this map maps one or more keys to the specified value containsValue(Object value whose presence in this map is to be tested value)
public Set<Map.Entry<K, V>>	Returns: a set view of the mappings contained in this map entrySet()
public V	Returns: the value to which the specified key is mapped, or `null` if this map contains no mapping for the key get(Object the key whose associated value is to be returned key)
public boolean	Returns: `true` if this map contains no key-value mappings isEmpty()
public Set<K>	Returns: a set view of the keys contained in this map keySet()
public V	Returns: the previous value associated with `key`, or `null` if there was no mapping for `key`. remove(Object key whose mapping is to be removed from the map key)
public int	Returns: the number of key-value mappings in this map size()
public Collection<V>	Returns: a collection view of the values contained in this map values()

Method Detail

containsKey	back to summary
public boolean containsKey(Object key) Parameters key:Object key whose presence in this map is to be tested Returns:boolean `true` if this map contains a mapping for the specified key See Also `java.util.Map#containsKey(Object)`

containsValue	back to summary
public boolean containsValue(Object value) Parameters value:Object value whose presence in this map is to be tested Returns:boolean `true` if this map maps one or more keys to the specified value See Also `java.util.Map#containsValue(Object)`

entrySet	back to summary
public Set<Map.Entry<K, V>> entrySet() Returns:Set<Map.Entry<K, V>> a set view of the mappings contained in this map See Also `java.util.Map#entrySet()`

get	back to summary
public V get(Object key) Parameters key:Object the key whose associated value is to be returned Returns:V the value to which the specified key is mapped, or `null` if this map contains no mapping for the key See Also `java.util.Map#get(Object)`

isEmpty	back to summary
public boolean isEmpty() Returns:boolean `true` if this map contains no key-value mappings See Also `java.util.Map#isEmpty()`

keySet	back to summary
public Set<K> keySet() Returns:Set<K> a set view of the keys contained in this map See Also `java.util.Map#keySet()`

remove	back to summary
public V remove(Object key) Parameters key:Object key whose mapping is to be removed from the map Returns:V the previous value associated with `key`, or `null` if there was no mapping for `key`. See Also `java.util.Map#remove(Object)`

size	back to summary
public int size() Returns:int the number of key-value mappings in this map See Also `java.util.Map#size()`

values	back to summary
public Collection<V> values() Returns:Collection<V> a collection view of the values contained in this map See Also `java.util.Map#values()`