org.apache.commons.collections.map
Class HashedMap<K,V>
java.lang.Object
java.util.AbstractMap<K,V>
org.apache.commons.collections.map.AbstractHashedMap<K,V>
org.apache.commons.collections.map.HashedMap<K,V>
- All Implemented Interfaces:
- Serializable, Cloneable, Map<K,V>, IterableMap<K,V>
public class HashedMap<K,V>
- extends AbstractHashedMap<K,V>
- implements Serializable, Cloneable
A Map
implementation that is a general purpose alternative
to HashMap
.
This implementation improves on the JDK1.4 HashMap by adding the
MapIterator
functionality and many methods for subclassing.
- Since:
- Commons Collections 3.0
- Version:
- $Revision: 1.1.1.1 $ $Date: 2005/05/23 04:35:52 $
- Author:
- Matt Hall, John Watkinson, Stephen Colebourne
- See Also:
- Serialized Form
Nested classes/interfaces inherited from class org.apache.commons.collections.map.AbstractHashedMap |
AbstractHashedMap.EntrySet<K,V>, AbstractHashedMap.EntrySetIterator<K,V>, AbstractHashedMap.HashEntry<K,V>, AbstractHashedMap.HashIterator<K,V>, AbstractHashedMap.HashMapIterator<K,V>, AbstractHashedMap.KeySet<K,V>, AbstractHashedMap.KeySetIterator<K,V>, AbstractHashedMap.Values<K,V>, AbstractHashedMap.ValuesIterator<K,V> |
Nested classes/interfaces inherited from interface java.util.Map |
Map.Entry<K,V> |
Fields inherited from class org.apache.commons.collections.map.AbstractHashedMap |
data, DEFAULT_CAPACITY, DEFAULT_LOAD_FACTOR, DEFAULT_THRESHOLD, entrySet, GETKEY_INVALID, GETVALUE_INVALID, keySet, loadFactor, MAXIMUM_CAPACITY, modCount, NO_NEXT_ENTRY, NO_PREVIOUS_ENTRY, NULL, REMOVE_INVALID, SETVALUE_INVALID, size, threshold, values |
Constructor Summary |
HashedMap()
Constructs a new empty map with default size and load factor. |
HashedMap(int initialCapacity)
Constructs a new, empty map with the specified initial capacity. |
HashedMap(int initialCapacity,
float loadFactor)
Constructs a new, empty map with the specified initial capacity and
load factor. |
HashedMap(Map<? extends K,? extends V> map)
Constructor copying elements from another map. |
Method Summary |
Object |
clone()
Clones the map without cloning the keys or values. |
Methods inherited from class org.apache.commons.collections.map.AbstractHashedMap |
addEntry, addMapping, calculateNewCapacity, calculateThreshold, checkCapacity, clear, containsKey, containsValue, createEntry, createEntrySetIterator, createKeySetIterator, createValuesIterator, destroyEntry, doReadObject, doWriteObject, ensureCapacity, entryHashCode, entryKey, entryNext, entrySet, entryValue, equals, get, getEntry, hash, hashCode, hashIndex, init, isEmpty, isEqualKey, isEqualValue, keySet, mapIterator, put, putAll, remove, removeEntry, removeMapping, reuseEntry, size, toString, updateEntry, values |
HashedMap
public HashedMap()
- Constructs a new empty map with default size and load factor.
HashedMap
public HashedMap(int initialCapacity)
- Constructs a new, empty map with the specified initial capacity.
- Parameters:
initialCapacity
- the initial capacity
- Throws:
IllegalArgumentException
- if the initial capacity is less than one
HashedMap
public HashedMap(int initialCapacity,
float loadFactor)
- Constructs a new, empty map with the specified initial capacity and
load factor.
- Parameters:
initialCapacity
- the initial capacityloadFactor
- the load factor
- Throws:
IllegalArgumentException
- if the initial capacity is less than one
IllegalArgumentException
- if the load factor is less than zero
HashedMap
public HashedMap(Map<? extends K,? extends V> map)
- Constructor copying elements from another map.
- Parameters:
map
- the map to copy
- Throws:
NullPointerException
- if the map is null
clone
public Object clone()
- Clones the map without cloning the keys or values.
- Overrides:
clone
in class AbstractHashedMap<K,V>
- Returns:
- a shallow clone
Copyright © 2005-2005 Apache Software Foundation, Matt Hall, John Watkinson. All Rights Reserved.