org.apache.commons.collections
Class MultiHashMap

java.lang.Object
  |
  +--java.util.AbstractMap
        |
        +--java.util.HashMap
              |
              +--org.apache.commons.collections.MultiHashMap

All Implemented Interfaces:

Cloneable, Map, MultiMap, Serializable

public class MultiHashMap

extends HashMap

implements MultiMap

MultiHashMap is the default implementation of the MultiMap interface. A MultiMap is a Map with slightly different semantics. Instead of returning an Object, it returns a Collection. So for example, you can put( key, new Integer(1) ); and then a Object get( key ); will return you a Collection instead of an Integer.

Since:

2.0

Author:

Christopher Berry, James Strachan, Steve Downey, Stephen Colebourne

See Also:

Serialized Form

Constructor Summary

MultiHashMap()

MultiHashMap(int initialCapacity)

MultiHashMap(int initialCapacity, float loadFactor)

MultiHashMap(Map mapToCopy)

Method Summary

void	clear()
Object	clone()
boolean	containsValue(Object value)
String	getName()
Object	put(Object key, Object value)
void	putAll(Map mapToPut)
Object	remove(Object key, Object item)
Collection	values()

Methods inherited from class java.util.HashMap

containsKey, entrySet, get, isEmpty, keySet, remove, 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

containsKey, entrySet, equals, get, hashCode, isEmpty, keySet, remove, size

Constructor Detail

MultiHashMap

public MultiHashMap()

MultiHashMap

public MultiHashMap(int initialCapacity)

MultiHashMap

public MultiHashMap(int initialCapacity,
                    float loadFactor)

MultiHashMap

public MultiHashMap(Map mapToCopy)

Method Detail

clear

public void clear()

Specified by:

clear in interface Map

Overrides:

clear in class HashMap

clone

public Object clone()

Overrides:

clone in class HashMap

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map

Overrides:

containsValue in class HashMap

getName

public String getName()

put

public Object put(Object key,
                  Object value)

Specified by:

put in interface Map

Overrides:

put in class HashMap

putAll

public void putAll(Map mapToPut)

Specified by:

putAll in interface Map

Overrides:

putAll in class HashMap

remove

public Object remove(Object key,
                     Object item)

Specified by:

remove in interface MultiMap

values

public Collection values()

Specified by:

values in interface Map

Overrides:

values in class HashMap