com.google.gwt.dev.util.collect

Class HashSet<E>

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractSet<E>

com.google.gwt.dev.util.collect.HashSet<E>

Type Parameters:

E - the element type

All Implemented Interfaces:

Serializable, Iterable<E>, Collection<E>, Set<E>

Direct Known Subclasses:

IdentityHashSet

public class HashSet<E>
extends AbstractSet<E>
implements Serializable

A memory-efficient hash set.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
HashSet()
HashSet(Collection<? extends E> c)

Method Summary

Modifier and Type	Method and Description
boolean	add(E e)
boolean	addAll(Collection<? extends E> c)
void	clear()
boolean	contains(Object o)
protected void	doReadObject(ObjectInputStream in) Adapted from org.apache.commons.collections.map.AbstractHashedMap.
protected void	doWriteObject(ObjectOutputStream out) Adapted from org.apache.commons.collections.map.AbstractHashedMap.
protected boolean	itemEquals(Object a, Object b) Returns whether two items are equal for the purposes of this set.
protected int	itemHashCode(Object o) Return the hashCode for an item.
Iterator<E>	iterator()
boolean	remove(Object o)
int	size()
Object[]	toArray()
<T> T[]	toArray(T[] a)

Methods inherited from class java.util.AbstractSet

equals, hashCode, removeAll

Methods inherited from class java.util.AbstractCollection

containsAll, isEmpty, retainAll, toString

Methods inherited from class java.lang.Object

finalize, getClass

Methods inherited from interface java.util.Set

spliterator

Methods inherited from interface java.util.Collection

containsAll, isEmpty, parallelStream, removeIf, retainAll, stream

Methods inherited from interface java.lang.Iterable

forEach

Constructor Detail

HashSet

public HashSet()

HashSet

public HashSet(Collection<? extends E> c)

Method Detail

add

public boolean add(E e)

Specified by:

add in interface Collection<E>

Overrides:

add in class AbstractCollection<E>

addAll

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

Specified by:

addAll in interface Collection<E>

Overrides:

addAll in class AbstractCollection<E>

clear

public void clear()

Specified by:

clear in interface Collection<E>

Overrides:

clear in class AbstractCollection<E>

contains

public boolean contains(Object o)

Specified by:

contains in interface Collection<E>

Overrides:

contains in class AbstractCollection<E>

iterator

public Iterator<E> iterator()

Specified by:

iterator in interface Iterable<E>

remove

public boolean remove(Object o)

Specified by:

remove in interface Collection<E>

Overrides:

remove in class AbstractCollection<E>

size

public int size()

Specified by:

size in interface Collection<E>

toArray

public Object[] toArray()

Specified by:

toArray in interface Collection<E>

Overrides:

toArray in class AbstractCollection<E>

toArray

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

Specified by:

toArray in interface Collection<E>

Overrides:

toArray in class AbstractCollection<E>

doReadObject

protected void doReadObject(ObjectInputStream in)
                     throws IOException,
                            ClassNotFoundException

Adapted from org.apache.commons.collections.map.AbstractHashedMap.

Throws:

IOException

ClassNotFoundException

doWriteObject

protected void doWriteObject(ObjectOutputStream out)
                      throws IOException

Adapted from org.apache.commons.collections.map.AbstractHashedMap.

Throws:

IOException

itemEquals

protected boolean itemEquals(Object a,
                             Object b)

Returns whether two items are equal for the purposes of this set.

itemHashCode

protected int itemHashCode(Object o)

Return the hashCode for an item.