public Class HashMultiSet<E>

Class Inheritance

extends AbstractMapMultiSet<E>
implements Serializable

java.lang.Object
java.util.AbstractCollection
org.apache.commons.collections4.multiset.AbstractMultiSet
org.apache.commons.collections4.multiset.AbstractMapMultiSet
org.apache.commons.collections4.multiset.HashMultiSet

All Implemented Interfaces

java.io.Serializable

Type Parameters

<E>: the type held in the multiset

Imports

java.io.IOException, .ObjectInputStream, .ObjectOutputStream, .Serializable, java.util.Collection, .HashMap

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

Field Summary

Modifier and Type	Field and Description
private static final long	serialVersionUID Serial version lock

Constructor Summary

Access	Constructor and Description
public	HashMultiSet() Constructs an empty `HashMultiSet`.
public	HashMultiSet(final Collection<? extends E> a collection to copy into this multiset coll) Constructs a multiset containing all the members of the given collection.

Method Summary

Modifier and Type	Method and Description
private void	readObject(final ObjectInputStream the input stream in) Read the multiset in using a custom routine.
private void	writeObject(final ObjectOutputStream the output stream out) Write the multiset out using a custom routine.

Field Detail

serialVersionUID	back to summary
private static final long serialVersionUID Serial version lock

Constructor Detail

HashMultiSet	back to summary
public HashMultiSet() Constructs an empty `HashMultiSet`.

HashMultiSet	back to summary
public HashMultiSet(final Collection<? extends E> coll) Constructs a multiset containing all the members of the given collection. Parameters coll:Collection<? extends E> a collection to copy into this multiset

HashMultiSet

back to summary

public HashMultiSet(final Collection<? extends E> coll)

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

Parameters

coll:Collection<? extends E>: a collection to copy into this multiset

Method Detail

readObject	back to summary
private void readObject(final ObjectInputStream in) throws IOException, ClassNotFoundException Read the multiset in using a custom routine. Parameters in:ObjectInputStream the input stream Exceptions IOException: if an error occurs while reading from the stream ClassNotFoundException: if an object read from the stream can not be loaded

readObject

back to summary

private void readObject(final ObjectInputStream in) throws IOException, ClassNotFoundException

Read the multiset in using a custom routine.

Parameters

in:ObjectInputStream: the input stream

Exceptions

IOException:: if an error occurs while reading from the stream
ClassNotFoundException:: if an object read from the stream can not be loaded

writeObject	back to summary
private void writeObject(final ObjectOutputStream out) throws IOException Write the multiset out using a custom routine. Parameters out:ObjectOutputStream the output stream Exceptions IOException: if an error occurs while writing to the stream

writeObject

back to summary

private void writeObject(final ObjectOutputStream out) throws IOException

Write the multiset out using a custom routine.

Parameters

out:ObjectOutputStream: the output stream

Exceptions

IOException:: if an error occurs while writing to the stream