org.zkoss.util

Class IdentityHashSet<T>

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractSet<T>

org.zkoss.util.IdentityHashSet<T>

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.lang.Iterable<T>, java.util.Collection<T>, java.util.Set<T>

public class IdentityHashSet<T>
extends java.util.AbstractSet<T>
implements java.util.Set<T>, java.lang.Cloneable, java.io.Serializable

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

Author:

tomyeh

See Also:

IdentityComparator, Serialized Form

Constructor Summary

Constructors

Constructor and Description
IdentityHashSet() Constructs a new, empty set; the backing IdentityHashMap instance has default capacity (32).
IdentityHashSet(java.util.Collection<T> 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

Modifier and Type	Method and Description
boolean	add(T o)
void	clear()
java.lang.Object	clone()
boolean	contains(java.lang.Object o)
boolean	isEmpty()
java.util.Iterator<T>	iterator()
boolean	remove(java.lang.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, spliterator, toArray, toArray

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream

Methods inherited from interface java.lang.Iterable

forEach

Constructor Detail

IdentityHashSet

public IdentityHashSet()

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

IdentityHashSet

public IdentityHashSet(java.util.Collection<T> 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:

java.lang.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:

java.lang.IllegalArgumentException - if expectedMaxSize is negative

Method Detail

iterator

public java.util.Iterator<T> iterator()

Specified by:

iterator in interface java.lang.Iterable<T>

Specified by:

iterator in interface java.util.Collection<T>

Specified by:

iterator in interface java.util.Set<T>

Specified by:

iterator in class java.util.AbstractCollection<T>

size

public int size()

Specified by:

size in interface java.util.Collection<T>

Specified by:

size in interface java.util.Set<T>

Specified by:

size in class java.util.AbstractCollection<T>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Collection<T>

Specified by:

isEmpty in interface java.util.Set<T>

Overrides:

isEmpty in class java.util.AbstractCollection<T>

contains

public boolean contains(java.lang.Object o)

Specified by:

contains in interface java.util.Collection<T>

Specified by:

contains in interface java.util.Set<T>

Overrides:

contains in class java.util.AbstractCollection<T>

add

public boolean add(T o)

Specified by:

add in interface java.util.Collection<T>

Specified by:

add in interface java.util.Set<T>

Overrides:

add in class java.util.AbstractCollection<T>

remove

public boolean remove(java.lang.Object o)

Specified by:

remove in interface java.util.Collection<T>

Specified by:

remove in interface java.util.Set<T>

Overrides:

remove in class java.util.AbstractCollection<T>

clear

public void clear()

Specified by:

clear in interface java.util.Collection<T>

Specified by:

clear in interface java.util.Set<T>

Overrides:

clear in class java.util.AbstractCollection<T>

clone

public java.lang.Object clone()

Overrides:

clone in class java.lang.Object