org.apache.commons.collections.bag

Class HashBag

java.lang.Object

org.apache.commons.collections.bag.AbstractMapBag

org.apache.commons.collections.bag.HashBag

All Implemented Interfaces:

java.io.Serializable, java.lang.Iterable, java.util.Collection, Bag

public class HashBag
extends AbstractMapBag
implements Bag, java.io.Serializable

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

A Bag 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. It is important to read the interface javadoc carefully as several methods violate the Collection interface specification.

Since:

Commons Collections 3.0 (previously in main package v2.0)

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
HashBag() Constructs an empty HashBag.
HashBag(java.util.Collection coll) Constructs a bag containing all the members of the given collection.

Method Summary

Methods inherited from class org.apache.commons.collections.bag.AbstractMapBag

add, add, addAll, clear, contains, containsAll, equals, getCount, hashCode, isEmpty, iterator, remove, remove, removeAll, retainAll, size, toArray, toArray, toString, uniqueSet

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.commons.collections.Bag

add, add, containsAll, getCount, iterator, remove, remove, removeAll, retainAll, size, uniqueSet

Methods inherited from interface java.util.Collection

addAll, clear, contains, equals, hashCode, isEmpty, parallelStream, removeIf, spliterator, stream, toArray, toArray

Methods inherited from interface java.lang.Iterable

forEach

Constructor Detail

HashBag

public HashBag()

Constructs an empty HashBag.

HashBag

public HashBag(java.util.Collection coll)

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

Parameters:

coll - a collection to copy into this bag