Class HashedMap
- java.lang.Object
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- java.util.AbstractMap
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- org.apache.commons.collections.map.AbstractHashedMap
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- org.apache.commons.collections.map.HashedMap
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- All Implemented Interfaces:
Serializable,Cloneable,Map,IterableMap
@Deprecated(since="2021-04-30") public class HashedMap extends AbstractHashedMap implements Serializable, Cloneable
Deprecated.Commons Collections 3 is in maintenance mode. Commons Collections 4 should be used instead.AMapimplementation that is a general purpose alternative toHashMap.This implementation improves on the JDK1.4 HashMap by adding the
MapIteratorfunctionality and many methods for subclassing.Note that HashedMap is not synchronized and is not thread-safe. If you wish to use this map from multiple threads concurrently, you must use appropriate synchronization. The simplest approach is to wrap this map using
Collections.synchronizedMap(Map). This class may throw exceptions when accessed by concurrent threads without synchronization.- Since:
- Commons Collections 3.0
- See Also:
- Serialized Form
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Nested Class Summary
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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>
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Constructor Summary
Constructors Constructor Description HashedMap()Deprecated.Constructs a new empty map with default size and load factor.HashedMap(int initialCapacity)Deprecated.Constructs a new, empty map with the specified initial capacity.HashedMap(int initialCapacity, float loadFactor)Deprecated.Constructs a new, empty map with the specified initial capacity and load factor.HashedMap(Map map)Deprecated.Constructor copying elements from another map.
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Method Summary
All Methods Instance Methods Concrete Methods Deprecated Methods Modifier and Type Method Description Objectclone()Deprecated.Clones the map without cloning the keys or values.-
Methods inherited from class org.apache.commons.collections.map.AbstractHashedMap
clear, containsKey, containsValue, entrySet, equals, get, hashCode, isEmpty, keySet, mapIterator, put, putAll, remove, size, toString, values
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Methods inherited from interface java.util.Map
compute, computeIfAbsent, computeIfPresent, forEach, getOrDefault, merge, putIfAbsent, remove, replace, replace, replaceAll
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Constructor Detail
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HashedMap
public HashedMap()
Deprecated.Constructs a new empty map with default size and load factor.
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HashedMap
public HashedMap(int initialCapacity)
Deprecated.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
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HashedMap
public HashedMap(int initialCapacity, float loadFactor)Deprecated.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 oneIllegalArgumentException- if the load factor is less than zero
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HashedMap
public HashedMap(Map map)
Deprecated.Constructor copying elements from another map.- Parameters:
map- the map to copy- Throws:
NullPointerException- if the map is null
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Method Detail
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clone
public Object clone()
Deprecated.Clones the map without cloning the keys or values.- Returns:
- a shallow clone
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