ca.quine.jcommons.transform.set
Class PositiveIntegerMultiTreeSet

java.lang.Object
  |
  +--java.util.AbstractCollection
        |
        +--java.util.AbstractSet
              |
              +--java.util.TreeSet
                    |
                    +--ca.quine.jcommons.transform.set.PositiveIntegerMultiTreeSet

All Implemented Interfaces:

Cloneable, Collection, Serializable, Set, SortedSet

public class PositiveIntegerMultiTreeSet

extends TreeSet

A multi-TreeSet that holds only Integer objects and uses multiplication instead of addition to form the hashCode(). The "multi" part means that the same number can be stored more than once in the set.

The primary use of this class will be to hold a set of Integers, and we will have many sets, all of which will add up to the same number.

In other words, the default hashCode() will return the same result for all sets. Since we intend to store all of them in a HashSet, that behaviour is obviously undesirable.

See Also:

Serialized Form

Constructor Summary

PositiveIntegerMultiTreeSet()

PositiveIntegerMultiTreeSet(SortedSet sortedSet)

PositiveIntegerMultiTreeSet(String stringList)

Method Summary

boolean	add(int i)
boolean	add(Object o)
boolean	contains(Object o)
Object	first()
int	hashCode()
SortedSet	headSet(Object toElement)
Iterator	iterator()
Object	last()
boolean	remove(Object o)
int	size()
SortedSet	subSet(Object fromElement, Object toElement)
SortedSet	tailSet(Object fromElement)

Methods inherited from class java.util.TreeSet

addAll, clear, clone, comparator, isEmpty

Methods inherited from class java.util.AbstractSet

equals, removeAll

Methods inherited from class java.util.AbstractCollection

containsAll, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Set

containsAll, equals, removeAll, retainAll, toArray, toArray

Constructor Detail

PositiveIntegerMultiTreeSet

public PositiveIntegerMultiTreeSet()

PositiveIntegerMultiTreeSet

public PositiveIntegerMultiTreeSet(SortedSet sortedSet)

PositiveIntegerMultiTreeSet

public PositiveIntegerMultiTreeSet(String stringList)

Method Detail

add

public boolean add(int i)

add

public boolean add(Object o)

Specified by:

add in interface Set

Overrides:

add in class TreeSet

hashCode

public int hashCode()

Specified by:

hashCode in interface Set

Overrides:

hashCode in class AbstractSet

iterator

public Iterator iterator()

Specified by:

iterator in interface Set

Overrides:

iterator in class TreeSet

headSet

public SortedSet headSet(Object toElement)

Specified by:

headSet in interface SortedSet

Overrides:

headSet in class TreeSet

tailSet

public SortedSet tailSet(Object fromElement)

Specified by:

tailSet in interface SortedSet

Overrides:

tailSet in class TreeSet

contains

public boolean contains(Object o)

Specified by:

contains in interface Set

Overrides:

contains in class TreeSet

first

public Object first()

Specified by:

first in interface SortedSet

Overrides:

first in class TreeSet

last

public Object last()

Specified by:

last in interface SortedSet

Overrides:

last in class TreeSet

remove

public boolean remove(Object o)

Specified by:

remove in interface Set

Overrides:

remove in class TreeSet

size

public int size()

Specified by:

size in interface Set

Overrides:

size in class TreeSet

subSet

public SortedSet subSet(Object fromElement,
                        Object toElement)

Specified by:

subSet in interface SortedSet

Overrides:

subSet in class TreeSet