Package 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:

Serializable, Cloneable, Iterable<T>, Collection<T>, Set<T>

public class IdentityHashSet<T>
extends AbstractSet<T>
implements Set<T>, Cloneable, Serializable

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

Author:

tomyeh

See Also:

• IdentityComparator
• Serialized Form

Constructor Summary

Constructors

Constructor	Description
IdentityHashSet()	Constructs a new, empty set; the backing IdentityHashMap instance has default capacity (32).
IdentityHashSet(int expectedMaxSize)	Constructs a new, empty set with the specified expected maximum size.
IdentityHashSet(Collection<T> c)	Constructs a new set containing the elements in the specified collection.

Method Summary

Modifier and Type	Method	Description
boolean	add(T o)
void	clear()
Object	clone()
boolean	contains(Object o)
boolean	isEmpty()
Iterator<T>	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.Collection

parallelStream, removeIf, stream, toArray

Methods inherited from interface java.lang.Iterable

forEach

Methods inherited from interface java.util.Set

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

Constructor Details

IdentityHashSet

public IdentityHashSet()

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

IdentityHashSet

public IdentityHashSet(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:

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 Details

iterator

public Iterator<T> iterator()

Specified by:

iterator in interface Collection<T>

Specified by:

iterator in interface Iterable<T>

Specified by:

iterator in interface Set<T>

Specified by:

iterator in class AbstractCollection<T>

size

public int size()

Specified by:

size in interface Collection<T>

Specified by:

size in interface Set<T>

Specified by:

size in class AbstractCollection<T>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Collection<T>

Specified by:

isEmpty in interface Set<T>

Overrides:

isEmpty in class AbstractCollection<T>

contains

public boolean contains(Object o)

Specified by:

contains in interface Collection<T>

Specified by:

contains in interface Set<T>

Overrides:

contains in class AbstractCollection<T>

add

public boolean add(T o)

Specified by:

add in interface Collection<T>

Specified by:

add in interface Set<T>

Overrides:

add in class AbstractCollection<T>

remove

public boolean remove(Object o)

Specified by:

remove in interface Collection<T>

Specified by:

remove in interface Set<T>

Overrides:

remove in class AbstractCollection<T>

clear

public void clear()

Specified by:

clear in interface Collection<T>

Specified by:

clear in interface Set<T>

Overrides:

clear in class AbstractCollection<T>

clone

public Object clone()

Overrides:

clone in class Object