de.caff.generics

Class IdentityHashSet<T>

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractSet<T>

de.caff.generics.IdentityHashSet<T>

All Implemented Interfaces:

java.lang.Iterable<T>, java.util.Collection<T>, java.util.Set<T>

public class IdentityHashSet<T>
extends java.util.AbstractSet<T>

Hash set based on identities. Although useful, this is missing in the Java standard library.

Since:

May 13, 2025

Author:

Rammi

Constructor Summary

Constructors

Constructor and Description
IdentityHashSet() Default constructor.
IdentityHashSet(java.util.Collection<? extends T> collection) Copy constructor.
IdentityHashSet(Countable<? extends T> countable) Copy constructor.
IdentityHashSet(int initialCapacity) Constructor.
IdentityHashSet(java.lang.Iterable<? extends T> iterable) Copy constructor.

Method Summary

Modifier and Type	Method and Description
boolean	add(T t)
boolean	addAll(java.util.Collection<? extends T> c)
void	clear()
boolean	contains(java.lang.Object o)
boolean	containsAll(java.util.Collection<?> c)
void	forEach(java.util.function.Consumer<? super T> action)
boolean	isEmpty()
java.util.Iterator<T>	iterator()
java.util.stream.Stream<T>	parallelStream()
boolean	remove(java.lang.Object o)
boolean	removeAll(java.util.Collection<?> c)
boolean	removeIf(java.util.function.Predicate<? super T> filter)
int	size()
java.util.Spliterator<T>	spliterator()
java.util.stream.Stream<T>	stream()
java.lang.Object[]	toArray()
<T1> T1[]	toArray(T1[] a)

Methods inherited from class java.util.AbstractSet

equals, hashCode

Methods inherited from class java.util.AbstractCollection

retainAll, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Set

retainAll

Constructor Detail

IdentityHashSet

public IdentityHashSet()

Default constructor.

IdentityHashSet

public IdentityHashSet(int initialCapacity)

Constructor.

Parameters:

initialCapacity - initial capacity of this set

IdentityHashSet

public IdentityHashSet(@NotNull
                       java.lang.Iterable<? extends T> iterable)

Copy constructor. This copies the values of the iterable to this set.

Parameters:

iterable - iterable providing the initial values

IdentityHashSet

public IdentityHashSet(@NotNull
                       java.util.Collection<? extends T> collection)

Copy constructor. This copies the values of the collection to this set.

Parameters:

collection - collection providing the initial values

IdentityHashSet

public IdentityHashSet(@NotNull
                       Countable<? extends T> countable)

Copy constructor. This copies the values of the countable to this set.

Parameters:

countable - countable providing the initial values

Method Detail

iterator

@NotNull
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>

spliterator

@NotNull
public java.util.Spliterator<T> spliterator()

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>

removeAll

public boolean removeAll(@NotNull
                         java.util.Collection<?> c)

Specified by:

removeAll in interface java.util.Collection<T>

Specified by:

removeAll in interface java.util.Set<T>

Overrides:

removeAll in class java.util.AbstractSet<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>

toArray

@NotNull
public java.lang.Object[] toArray()

Specified by:

toArray in interface java.util.Collection<T>

Specified by:

toArray in interface java.util.Set<T>

Overrides:

toArray in class java.util.AbstractCollection<T>

toArray

@NotNull
public <T1> T1[] toArray(@NotNull
                                  T1[] a)

Specified by:

toArray in interface java.util.Collection<T>

Specified by:

toArray in interface java.util.Set<T>

Overrides:

toArray in class java.util.AbstractCollection<T>

add

public boolean add(T t)

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>

containsAll

public boolean containsAll(@NotNull
                           java.util.Collection<?> c)

Specified by:

containsAll in interface java.util.Collection<T>

Specified by:

containsAll in interface java.util.Set<T>

Overrides:

containsAll in class java.util.AbstractCollection<T>

addAll

public boolean addAll(@NotNull
                      java.util.Collection<? extends T> c)

Specified by:

addAll in interface java.util.Collection<T>

Specified by:

addAll in interface java.util.Set<T>

Overrides:

addAll 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>

removeIf

public boolean removeIf(@NotNull
                        java.util.function.Predicate<? super T> filter)

stream

@NotNull
public java.util.stream.Stream<T> stream()

parallelStream

@NotNull
public java.util.stream.Stream<T> parallelStream()

forEach

public void forEach(java.util.function.Consumer<? super T> action)