org.zkoss.util
Class IdentityHashSet

java.lang.Object
  java.util.AbstractCollection
      java.util.AbstractSet
          org.zkoss.util.IdentityHashSet

All Implemented Interfaces:

Serializable, Cloneable, Iterable, Collection, Set

public class IdentityHashSet
extends AbstractSet
implements Set, Cloneable, Serializable

Like java.util.InternalHashMap, it uses == and System.identityHashCode for doing HashSet.

Author:

tomyeh

See Also:

IdentityComparator, Serialized Form

Constructor Summary

IdentityHashSet()
Constructs a new, empty set; the backing IdentityHashMap instance has default capacity (32).

IdentityHashSet(Collection c)
Constructs a new set containing the elements in the specified collection.

IdentityHashSet(int expectedMaxSize)
Constructs a new, empty set with the specified expected maximum size.

Method Summary

boolean	add(Object o)
void	clear()
Object	clone()
boolean	contains(Object o)
boolean	isEmpty()
Iterator	iterator()
boolean	remove(Object o)
int	size()

Methods inherited from class java.util.AbstractSet

equals, hashCode, removeAll

Methods inherited from class java.util.AbstractCollection

addAll, 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

addAll, containsAll, equals, hashCode, removeAll, retainAll, toArray, toArray

Constructor Detail

IdentityHashSet

public IdentityHashSet()

Constructs a new, empty set; the backing IdentityHashMap instance has default capacity (32).

IdentityHashSet

public IdentityHashSet(Collection c)

Constructs a new set containing the elements in the specified collection.

Parameters:

c - the collection whose elements are to be placed into this set.

Throws:

NullPointerException - if the specified collection is null.

IdentityHashSet

public IdentityHashSet(int expectedMaxSize)

Constructs a new, empty set with the specified expected maximum size.

Parameters:

expectedMaxSize - the expected maximum size of the map.

Throws:

IllegalArgumentException - if expectedMaxSize is negative

Method Detail

iterator

public Iterator iterator()

Specified by:

iterator in interface Iterable

Specified by:

iterator in interface Collection

Specified by:

iterator in interface Set

Specified by:

iterator in class AbstractCollection

size

public int size()

Specified by:

size in interface Collection

Specified by:

size in interface Set

Specified by:

size in class AbstractCollection

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Collection

Specified by:

isEmpty in interface Set

Overrides:

isEmpty in class AbstractCollection

contains

public boolean contains(Object o)

Specified by:

contains in interface Collection

Specified by:

contains in interface Set

Overrides:

contains in class AbstractCollection

add

public boolean add(Object o)

Specified by:

add in interface Collection

Specified by:

add in interface Set

Overrides:

add in class AbstractCollection

remove

public boolean remove(Object o)

Specified by:

remove in interface Collection

Specified by:

remove in interface Set

Overrides:

remove in class AbstractCollection

clear

public void clear()

Specified by:

clear in interface Collection

Specified by:

clear in interface Set

Overrides:

clear in class AbstractCollection

clone

public Object clone()

Overrides:

clone in class Object