Package de.florianmichael.rclasses.pattern

Class ReverseHashMap<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<K,V>

java.util.LinkedHashMap<K,V>

de.florianmichael.rclasses.pattern.ReverseHashMap<K,V>

Type Parameters:

K - The key type.

V - The value type.

All Implemented Interfaces:

Serializable, Cloneable, Map<K,V>

public class ReverseHashMap<K,V>
extends LinkedHashMap<K,V>

Implementation of a reverse hash map. This map is able to get the key of a given value.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K extends Object,V extends Object>, AbstractMap.SimpleImmutableEntry<K extends Object,V extends Object>

Constructor Summary

Constructors

Constructor	Description
ReverseHashMap()

Method Summary

Modifier and Type	Method	Description
K	getKey(V value)
V	put(K key, V value)	Puts a key and a value into the map.

Methods inherited from class java.util.LinkedHashMap

clear, containsValue, entrySet, forEach, get, getOrDefault, keySet, removeEldestEntry, replaceAll, values

Methods inherited from class java.util.HashMap

clone, compute, computeIfAbsent, computeIfPresent, containsKey, isEmpty, merge, putAll, putIfAbsent, remove, remove, replace, replace, size

Methods inherited from class java.util.AbstractMap

equals, hashCode, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, containsKey, equals, hashCode, isEmpty, merge, putAll, putIfAbsent, remove, remove, replace, replace, size

Constructor Details

ReverseHashMap

public ReverseHashMap()

Method Details

put

public V put(K key,
 V value)

Puts a key and a value into the map. The value will be also put into the reversed map.

Specified by:

put in interface Map<K,V>

Overrides:

put in class HashMap<K,V>

Parameters:

key - The key.

value - The value.

Returns:

The value.

getKey

public K getKey(V value)

Parameters:

value - The value.

Returns:

The key of the given value.