org.apache.commons.collections4.multiset

Class HashMultiSet<E>

java.lang.Object

java.util.AbstractCollection<E>

org.apache.commons.collections4.multiset.AbstractMultiSet<E>

org.apache.commons.collections4.multiset.AbstractMapMultiSet<E>

org.apache.commons.collections4.multiset.HashMultiSet<E>

Type Parameters:

E - the type held in the multiset

All Implemented Interfaces:

Serializable, Iterable<E>, Collection<E>, MultiSet<E>

public class HashMultiSet<E>
extends AbstractMapMultiSet<E>
implements Serializable

Implements MultiSet, using a HashMap to provide the data storage. This is the standard implementation of a multiset.

A MultiSet stores each object in the collection together with a count of occurrences. Extra methods on the interface allow multiple copies of an object to be added or removed at once.

Since:

4.1

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.commons.collections4.MultiSet

MultiSet.Entry<E>

Constructor Summary

Constructors

Constructor and Description
HashMultiSet() Constructs an empty HashMultiSet.
HashMultiSet(Collection<? extends E> coll) Constructs a multiset containing all the members of the given collection.

Method Summary

Methods inherited from class org.apache.commons.collections4.multiset.AbstractMapMultiSet

add, clear, contains, equals, getCount, hashCode, isEmpty, iterator, remove, size, toArray, toArray

Methods inherited from class org.apache.commons.collections4.multiset.AbstractMultiSet

add, entrySet, remove, removeAll, setCount, toString, uniqueSet

Methods inherited from class java.util.AbstractCollection

addAll, containsAll, retainAll

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.commons.collections4.MultiSet

containsAll, retainAll

Methods inherited from interface java.util.Collection

addAll, parallelStream, removeIf, spliterator, stream

Methods inherited from interface java.lang.Iterable

forEach

Constructor Detail

HashMultiSet

public HashMultiSet()

Constructs an empty HashMultiSet.

HashMultiSet

public HashMultiSet(Collection<? extends E> coll)

Constructs a multiset containing all the members of the given collection.

Parameters:

coll - a collection to copy into this multiset