Top Description Fields Constructors Methods
org.hsqldb.lib

public Class HashSet<E>

extends BaseHashMap
implements Set<E>
Class Inheritance
All Implemented Interfaces
org.hsqldb.lib.Set, org.hsqldb.lib.Collection
Known Direct Subclasses
org.hsqldb.lib.OrderedHashSet
Imports
org.hsqldb.map.BaseHashMap
This class does not store null keys.
Author
Fred Toussi (fredt@users dot sourceforge.net)
Since
1.7.2
Version
2.7.3

Field Summary

Inherited from org.hsqldb.map.BaseHashMap:
ACCESS_MAXaccessCountaccessMinaccessTablecomparatoremptyObjectArrayhashIndexhasZeroKeyinitialCapacityintKeyOrValueintKeyTableintValueTableisAccessCountisIntKeyisIntValueisLastAccessCountisListisLongKeyisLongValueisMultiValueisNoValueisObjectKeyisObjectValueloadFactorlongKeyOrValuelongKeyTablelongValueTablemaxCapacityminimizeOnEmptyNO_PURGEnoKeyOrValueobjectKeyOrValueobjectKeyTableobjectValueTableobjectValueTable2objectValueTable3PURGE_ALLPURGE_HALFpurgePolicythresholdzeroKeyIndexzeroOrNullValueCount

Constructor Summary

AccessConstructor and Description
public
HashSet()

public
HashSet(int initialCapacity)

public
HashSet(int initialCapacity, ObjectComparator<E> comparator)

public
HashSet(E[] valueList)

Method Summary

Modifier and TypeMethod and Description
public boolean

Returns:

true if added
add(E
the element
key)

Implements org.hsqldb.lib.Collection.add.

returns true if element is added

public boolean

Returns:

true if any element is added
addAll(Collection<? extends E>
the Collection to add
c)

Implements org.hsqldb.lib.Collection.addAll.

returns true if any element is added

public boolean

Returns:

true if any element is added
addAll(E[]
the array of elements to add
keys)

returns true if any element is added

public boolean

Returns:

true if any element was added
addAll(E[]
array of keys to add
keys, int
first index to add
start, int
limit of index to add
limit)

returns true if any added

public int
capacity()

Overrides org.hsqldb.map.BaseHashMap.capacity.

public boolean
contains(Object key)

Implements org.hsqldb.lib.Collection.contains.

public boolean
containsAll(Collection<E> col)

public E
get(E key)

public int
getCommonElementCount(Set<E> other)

public E
getOrAdd(E key)

returns existing value or null if added can be used as an Object cache

public Iterator<E>
iterator()

Implements org.hsqldb.lib.Collection.iterator.

public boolean

Returns:

true if removed
remove(E
Object to remove
key)

Implements org.hsqldb.lib.Collection.remove.

returns true if removed

public boolean

Returns:

true if all removed
removeAll(Collection<E>
Collection of elements to remove
c)

returns true if all were removed

public boolean

Returns:

boolean
removeAll(E[]
E[]
keys)

returns true if all were removed

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

public Object[]
toArray()

public String

Returns:

String representation
toString()

Overrides java.lang.Object.toString.

Returns a String like "[Drei, zwei, Eins]", exactly like java.util.HashSet.

Inherited from org.hsqldb.map.BaseHashMap:
addMultiValaddOrRemoveObjectaddOrUpdateclearclonecontainsIntKeycontainsLongKeycontainsObjectKeycontainsValuecontainsValuecontainsValuegetAccessCountCeilinggetLookupgetLookupgetLookupgetLookupgetMultiValuesIteratorgetObjectLookupinsertRowisEmptymultiValueElementCountmultiValueKeyCountmultiValueKeysToArraynextLookuprehashremoveremoveMultiValremoveObjectremoveRowresetresetAccessCountsetAccessCountFloorsizetoArraytoArraytoIntArraytoLongArray

Constructor Detail

HashSetback to summary
public HashSet()
HashSetback to summary
public HashSet(int initialCapacity) throws IllegalArgumentException
HashSetback to summary
public HashSet(int initialCapacity, ObjectComparator<E> comparator) throws IllegalArgumentException
HashSetback to summary
public HashSet(E[] valueList)

Method Detail

addback to summary
public boolean add(E key)

Implements org.hsqldb.lib.Collection.add.

returns true if element is added

Parameters
key:E

the element

Returns:boolean

true if added

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

Implements org.hsqldb.lib.Collection.addAll.

returns true if any element is added

Parameters
c:Collection<? extends E>

the Collection to add

Returns:boolean

true if any element is added

addAllback to summary
public boolean addAll(E[] keys)

returns true if any element is added

Parameters
keys:E[]

the array of elements to add

Returns:boolean

true if any element is added

addAllback to summary
public boolean addAll(E[] keys, int start, int limit)

returns true if any added

Parameters
keys:E[]

array of keys to add

start:int

first index to add

limit:int

limit of index to add

Returns:boolean

true if any element was added

capacityback to summary
public int capacity()

Overrides org.hsqldb.map.BaseHashMap.capacity.

containsback to summary
public boolean contains(Object key)

Implements org.hsqldb.lib.Collection.contains.

containsAllback to summary
public boolean containsAll(Collection<E> col)
getback to summary
public E get(E key)
getCommonElementCountback to summary
public int getCommonElementCount(Set<E> other)
getOrAddback to summary
public E getOrAdd(E key)

returns existing value or null if added can be used as an Object cache

iteratorback to summary
public Iterator<E> iterator()

Implements org.hsqldb.lib.Collection.iterator.

removeback to summary
public boolean remove(E key)

Implements org.hsqldb.lib.Collection.remove.

returns true if removed

Parameters
key:E

Object to remove

Returns:boolean

true if removed

removeAllback to summary
public boolean removeAll(Collection<E> c)

returns true if all were removed

Parameters
c:Collection<E>

Collection of elements to remove

Returns:boolean

true if all removed

removeAllback to summary
public boolean removeAll(E[] keys)

returns true if all were removed

Parameters
keys:E[]

E[]

Returns:boolean

boolean

toArrayback to summary
public <T> T[] toArray(T[] a)
toArrayback to summary
public Object[] toArray()
toStringback to summary
public String toString()

Overrides java.lang.Object.toString.

Returns a String like "[Drei, zwei, Eins]", exactly like java.util.HashSet.

Returns:String

String representation