Package dev.nm.misc.datastructure

Class IdentityHashSet<T>

java.lang.Object

dev.nm.misc.datastructure.IdentityHashSet<T>

Type Parameters:

T - a type

All Implemented Interfaces:

Iterable<T>, Collection<T>, Set<T>

public class IdentityHashSet<T>
extends Object
implements Set<T>

This class implements the Set interface with a hash table, using reference-equality in place of object-equality when comparing keys and values.

See Also:

• Bug issue #4479578

Constructor Summary

Constructors

Constructor	Description
IdentityHashSet()	Construct an empty IdentityHashSet.
IdentityHashSet(Collection<T> col)	Construct an IdentityHashSet with a collection of items.

Method Summary

Modifier and Type	Method	Description
boolean	add(T e)
boolean	addAll(Collection<? extends T> c)
void	clear()
boolean	contains(Object o)
boolean	containsAll(Collection<?> c)
boolean	equals(Object obj)
int	hashCode()
boolean	isEmpty()
Iterator<T>	iterator()
boolean	remove(Object o)
boolean	removeAll(Collection<?> c)
boolean	retainAll(Collection<?> c)
int	size()
Object[]	toArray()
<T> T[]	toArray(T[] a)
String	toString()

Methods inherited from class java.lang.Object

clone, 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

spliterator

Constructor Details

IdentityHashSet

public IdentityHashSet()

Construct an empty IdentityHashSet.

IdentityHashSet

public IdentityHashSet(Collection<T> col)

Construct an IdentityHashSet with a collection of items.

Parameters:

col - a collection of items

Method Details

size

public int size()

Specified by:

size in interface Collection<T>

Specified by:

size in interface Set<T>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Collection<T>

Specified by:

isEmpty in interface Set<T>

contains

public boolean contains(Object o)

Specified by:

contains in interface Collection<T>

Specified by:

contains in interface Set<T>

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>

toArray

public Object[] toArray()

Specified by:

toArray in interface Collection<T>

Specified by:

toArray in interface Set<T>

toArray

public <T> T[] toArray(T[] a)

Specified by:

toArray in interface Collection<T>

Specified by:

toArray in interface Set<T>

add

public boolean add(T e)

Specified by:

add in interface Collection<T>

Specified by:

add in interface Set<T>

remove

public boolean remove(Object o)

Specified by:

remove in interface Collection<T>

Specified by:

remove in interface Set<T>

containsAll

public boolean containsAll(Collection<?> c)

Specified by:

containsAll in interface Collection<T>

Specified by:

containsAll in interface Set<T>

addAll

public boolean addAll(Collection<? extends T> c)

Specified by:

addAll in interface Collection<T>

Specified by:

addAll in interface Set<T>

retainAll

public boolean retainAll(Collection<?> c)

Specified by:

retainAll in interface Collection<T>

Specified by:

retainAll in interface Set<T>

removeAll

public boolean removeAll(Collection<?> c)

Specified by:

removeAll in interface Collection<T>

Specified by:

removeAll in interface Set<T>

clear

public void clear()

Specified by:

clear in interface Collection<T>

Specified by:

clear in interface Set<T>

hashCode

public int hashCode()

Specified by:

hashCode in interface Collection<T>

Specified by:

hashCode in interface Set<T>

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Specified by:

equals in interface Collection<T>

Specified by:

equals in interface Set<T>

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object