org.apache.commons.collections.bag
public class TreeBag extends AbstractMapBag implements SortedBag, Serializable
SortedBag
, using a TreeMap
to provide
the data storage. This is the standard implementation of a sorted bag.
Order will be maintained among the bag members and can be viewed through the iterator.
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)
Version: $Revision: 348299 $ $Date: 2005-11-22 23:51:45 +0000 (Tue, 22 Nov 2005) $
Constructor Summary | |
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TreeBag()
Constructs an empty TreeBag . | |
TreeBag(Comparator comparator)
Constructs an empty bag that maintains order on its unique
representative members according to the given Comparator.
| |
TreeBag(Collection coll)
Constructs a TreeBag containing all the members of the
specified collection.
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Method Summary | |
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Comparator | comparator() |
Object | first() |
Object | last() |
TreeBag
.Parameters: comparator the comparator to use
TreeBag
containing all the members of the
specified collection.
Parameters: coll the collection to copy into the bag