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:
Bag, Bag, 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.
- Commons Collections 3.0 (previously in main package v2.0)
- Chuck Burdick
- Stephen Colebourne
HashBag
public HashBag()
Constructs an empty HashBag
.
HashBag
public HashBag(Collection coll)
Constructs a bag containing all the members of the given collection.
- coll - a collection to copy into this bag
Bag
, using aHashMap
to provide the data storage. This is the standard implementation of a bag. ABag
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 theCollection
interface specification.