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java.lang.Objectorg.apache.commons.collections.bag.AbstractMapBag
org.apache.commons.collections.bag.TreeBag
public class TreeBag
Implements 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.
| Nested Class Summary |
|---|
| Nested classes/interfaces inherited from class org.apache.commons.collections.bag.AbstractMapBag |
|---|
AbstractMapBag.MutableInteger |
| Constructor Summary | |
|---|---|
TreeBag()
Constructs an empty TreeBag. |
|
TreeBag(java.util.Collection coll)
Constructs a TreeBag containing all the members of the
specified collection. |
|
TreeBag(java.util.Comparator comparator)
Constructs an empty bag that maintains order on its unique representative members according to the given Comparator. |
|
| Method Summary | |
|---|---|
java.util.Comparator |
comparator()
Returns the comparator associated with this sorted set, or null if it uses its elements' natural ordering. |
java.lang.Object |
first()
Returns the first (lowest) member. |
java.lang.Object |
last()
Returns the last (highest) member. |
| Methods inherited from class org.apache.commons.collections.bag.AbstractMapBag |
|---|
add, add, addAll, clear, contains, containsAll, doReadObject, doWriteObject, equals, getCount, getMap, hashCode, isEmpty, iterator, remove, remove, removeAll, retainAll, size, toArray, toArray, toString, uniqueSet |
| Methods inherited from class java.lang.Object |
|---|
clone, finalize, 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, toArray, toArray |
| Constructor Detail |
|---|
public TreeBag()
TreeBag.
public TreeBag(java.util.Comparator comparator)
Comparator.
comparator - the comparator to usepublic TreeBag(java.util.Collection coll)
TreeBag containing all the members of the
specified collection.
coll - the collection to copy into the bag| Method Detail |
|---|
public java.lang.Object first()
SortedBag
first in interface SortedBagpublic java.lang.Object last()
SortedBag
last in interface SortedBagpublic java.util.Comparator comparator()
SortedBag
comparator in interface SortedBag
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