gnu.trove

Class THashSet<E>

java.lang.Object

gnu.trove.THash

gnu.trove.TObjectHash<E>

gnu.trove.THashSet<E>

All Implemented Interfaces:

Equality<E>, TObjectHashingStrategy<E>, java.io.Serializable, java.lang.Cloneable, java.lang.Iterable<E>, java.util.Collection<E>, java.util.Set<E>

public class THashSet<E>
extends TObjectHash<E>
implements java.util.Set<E>

An implementation of the Set interface that uses an open-addressed hash table to store its contents. Created: Sat Nov 3 10:38:17 2001

See Also:

Serialized Form

Field Summary

Fields inherited from class gnu.trove.TObjectHash

_hashingStrategy, _set, NULL, REMOVED

Fields inherited from class gnu.trove.THash

_deadkeys, _free, _loadFactor, _maxSize, _size, DEFAULT_INITIAL_CAPACITY, DEFAULT_LOAD_FACTOR, EMPTY_OBJECT_ARRAY, JUST_CREATED_CAPACITY

Fields inherited from interface gnu.trove.TObjectHashingStrategy

CANONICAL, IDENTITY

Constructor Summary

Constructors

Constructor and Description
THashSet() Creates a new THashSet instance with the default capacity and load factor.
THashSet(java.util.Collection<? extends E> collection) Creates a new THashSet instance containing the elements of collection.
THashSet(java.util.Collection<? extends E> collection, TObjectHashingStrategy<E> strategy) Creates a new THashSet instance containing the elements of collection.
THashSet(int initialCapacity) Creates a new THashSet instance with a prime capacity equal to or greater than initialCapacity and with the default load factor.
THashSet(int initialCapacity, float loadFactor) Creates a new THashSet instance with a prime capacity equal to or greater than initialCapacity and with the specified load factor.
THashSet(int initialCapacity, float loadFactor, TObjectHashingStrategy<E> strategy) Creates a new THashSet instance with a prime capacity equal to or greater than initialCapacity and with the specified load factor.
THashSet(int initialCapacity, TObjectHashingStrategy<E> strategy) Creates a new THashSet instance with a prime capacity equal to or greater than initialCapacity and with the default load factor.
THashSet(TObjectHashingStrategy<E> strategy) Creates a new THashSet instance with the default capacity and load factor.

Method Summary

Modifier and Type	Method and Description
boolean	add(E obj) Inserts a value into the set.
boolean	addAll(java.util.Collection<? extends E> collection) Adds all of the elements in collection to the set.
void	clear() Empties the set.
boolean	containsAll(java.util.Collection<?> collection) Tests the set to determine if all of the elements in collection are present.
boolean	equals(java.lang.Object other)
int	hashCode()
java.util.Iterator<E>	iterator() Creates an iterator over the values of the set.
protected void	rehash(int newCapacity) Expands the set to accomodate new values.
boolean	remove(java.lang.Object obj) Removes obj from the set.
boolean	removeAll(java.util.Collection<?> collection) Removes all of the elements in collection from the set.
boolean	retainAll(java.util.Collection<?> collection) Removes any values in the set which are not contained in collection.
java.lang.Object[]	toArray() Returns a new array containing the objects in the set.
<T> T[]	toArray(T[] a) Returns a typed array of the objects in the set.
java.lang.String	toString()

Methods inherited from class gnu.trove.TObjectHash

capacity, clone, computeHashCode, contains, equals, forEach, index, insertionIndex, removeAt, setUp, throwObjectContractViolation

Methods inherited from class gnu.trove.THash

calculateGrownCapacity, compact, ensureCapacity, isEmpty, postInsertHook, size, startCompactingOnRemove, stopCompactingOnRemove, trimToSize

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Set

contains, isEmpty, size, spliterator

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream

Methods inherited from interface java.lang.Iterable

forEach

Constructor Detail

THashSet

public THashSet()

Creates a new THashSet instance with the default capacity and load factor.

THashSet

public THashSet(TObjectHashingStrategy<E> strategy)

Creates a new THashSet instance with the default capacity and load factor.

Parameters:

strategy - used to compute hash codes and to compare objects.

THashSet

public THashSet(int initialCapacity)

Creates a new THashSet instance with a prime capacity equal to or greater than initialCapacity and with the default load factor.

Parameters:

initialCapacity - an int value

THashSet

public THashSet(int initialCapacity,
                TObjectHashingStrategy<E> strategy)

Creates a new THashSet instance with a prime capacity equal to or greater than initialCapacity and with the default load factor.

Parameters:

initialCapacity - an int value

strategy - used to compute hash codes and to compare objects.

THashSet

public THashSet(int initialCapacity,
                float loadFactor)

Creates a new THashSet instance with a prime capacity equal to or greater than initialCapacity and with the specified load factor.

Parameters:

initialCapacity - an int value

loadFactor - a float value

THashSet

public THashSet(int initialCapacity,
                float loadFactor,
                TObjectHashingStrategy<E> strategy)

Creates a new THashSet instance with a prime capacity equal to or greater than initialCapacity and with the specified load factor.

Parameters:

initialCapacity - an int value

loadFactor - a float value

strategy - used to compute hash codes and to compare objects.

THashSet

public THashSet(java.util.Collection<? extends E> collection)

Creates a new THashSet instance containing the elements of collection.

Parameters:

collection - a Collection value

THashSet

public THashSet(java.util.Collection<? extends E> collection,
                TObjectHashingStrategy<E> strategy)

Creates a new THashSet instance containing the elements of collection.

Parameters:

collection - a Collection value

strategy - used to compute hash codes and to compare objects.

Method Detail

add

public boolean add(E obj)

Inserts a value into the set.

Specified by:

add in interface java.util.Collection<E>

Specified by:

add in interface java.util.Set<E>

Parameters:

obj - an Object value

Returns:

true if the set was modified by the add operation

equals

public boolean equals(java.lang.Object other)

Specified by:

equals in interface java.util.Collection<E>

Specified by:

equals in interface java.util.Set<E>

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Specified by:

hashCode in interface java.util.Collection<E>

Specified by:

hashCode in interface java.util.Set<E>

Overrides:

hashCode in class java.lang.Object

rehash

protected void rehash(int newCapacity)

Expands the set to accomodate new values.

Specified by:

rehash in class THash

Parameters:

newCapacity - an int value

toArray

public java.lang.Object[] toArray()

Returns a new array containing the objects in the set.

Specified by:

toArray in interface java.util.Collection<E>

Specified by:

toArray in interface java.util.Set<E>

Returns:

an Object[] value

toArray

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

Returns a typed array of the objects in the set.

Specified by:

toArray in interface java.util.Collection<E>

Specified by:

toArray in interface java.util.Set<E>

Parameters:

a - an Object[] value

Returns:

an Object[] value

clear

public void clear()

Empties the set.

Specified by:

clear in interface java.util.Collection<E>

Specified by:

clear in interface java.util.Set<E>

Overrides:

clear in class THash

remove

public boolean remove(java.lang.Object obj)

Removes obj from the set.

Specified by:

remove in interface java.util.Collection<E>

Specified by:

remove in interface java.util.Set<E>

Parameters:

obj - an Object value

Returns:

true if the set was modified by the remove operation.

iterator

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

Creates an iterator over the values of the set. The iterator supports element deletion.

Specified by:

iterator in interface java.lang.Iterable<E>

Specified by:

iterator in interface java.util.Collection<E>

Specified by:

iterator in interface java.util.Set<E>

Returns:

an Iterator value

containsAll

public boolean containsAll(java.util.Collection<?> collection)

Tests the set to determine if all of the elements in collection are present.

Specified by:

containsAll in interface java.util.Collection<E>

Specified by:

containsAll in interface java.util.Set<E>

Parameters:

collection - a Collection value

Returns:

true if all elements were present in the set.

addAll

public boolean addAll(java.util.Collection<? extends E> collection)

Adds all of the elements in collection to the set.

Specified by:

addAll in interface java.util.Collection<E>

Specified by:

addAll in interface java.util.Set<E>

Parameters:

collection - a Collection value

Returns:

true if the set was modified by the add all operation.

removeAll

public boolean removeAll(java.util.Collection<?> collection)

Removes all of the elements in collection from the set.

Specified by:

removeAll in interface java.util.Collection<E>

Specified by:

removeAll in interface java.util.Set<E>

Parameters:

collection - a Collection value

Returns:

true if the set was modified by the remove all operation.

retainAll

public boolean retainAll(java.util.Collection<?> collection)

Removes any values in the set which are not contained in collection.

Specified by:

retainAll in interface java.util.Collection<E>

Specified by:

retainAll in interface java.util.Set<E>

Parameters:

collection - a Collection value

Returns:

true if the set was modified by the retain all operation

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object