
PCJ API Version 1.2 

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java.lang.Object bak.pcj.AbstractByteCollection bak.pcj.set.AbstractByteSet bak.pcj.set.ByteOpenHashSet
This class represents open addressing hash table based sets of byte values. Unlike the Java Collections HashSet instances of this class are not backed up by a map. It is implemented using a simple open addressing hash table where the keys are stored directly as entries.
ByteOpenHashSet
,
HashSet
,
Serialized FormField Summary  
static int 
DEFAULT_CAPACITY
The default capacity of this set. 
static int 
DEFAULT_GROWTH_CHUNK
The default chunk size with which to increase the capacity of this set. 
static double 
DEFAULT_GROWTH_FACTOR
The default factor with which to increase the capacity of this set. 
static double 
DEFAULT_LOAD_FACTOR
The default load factor of this set. 
Constructor Summary  
ByteOpenHashSet()
Creates a new hash set with capacity 11, a relative growth factor of 1.0, and a load factor of 75%. 

ByteOpenHashSet(byte[] a)
Creates a new hash set with the same elements as the specified array. 

ByteOpenHashSet(ByteCollection c)
Creates a new hash set with the same elements as a specified collection. 

ByteOpenHashSet(ByteHashFunction keyhash)
Creates a new hash set with capacity 11, a relative growth factor of 1.0, and a load factor of 75%. 

ByteOpenHashSet(ByteHashFunction keyhash,
double loadFactor)
Creates a new hash set with a capacity of 11, a relative growth factor of 1.0, and a specified load factor. 

ByteOpenHashSet(ByteHashFunction keyhash,
int capacity)
Creates a new hash set with a specified capacity, a relative growth factor of 1.0, and a load factor of 75%. 

ByteOpenHashSet(ByteHashFunction keyhash,
int capacity,
double loadFactor)
Creates a new hash set with a specified capacity and load factor, and a relative growth factor of 1.0. 

ByteOpenHashSet(ByteHashFunction keyhash,
int capacity,
double loadFactor,
double growthFactor)
Creates a new hash set with a specified capacity, load factor, and relative growth factor. 

ByteOpenHashSet(ByteHashFunction keyhash,
int capacity,
double loadFactor,
int growthChunk)
Creates a new hash set with a specified capacity, load factor, and absolute growth factor. 

ByteOpenHashSet(double loadFactor)
Creates a new hash set with a capacity of 11, a relative growth factor of 1.0, and a specified load factor. 

ByteOpenHashSet(int capacity)
Creates a new hash set with a specified capacity, a relative growth factor of 1.0, and a load factor of 75%. 

ByteOpenHashSet(int capacity,
double loadFactor)
Creates a new hash set with a specified capacity and load factor, and a relative growth factor of 1.0. 

ByteOpenHashSet(int capacity,
double loadFactor,
double growthFactor)
Creates a new hash set with a specified capacity, load factor, and relative growth factor. 

ByteOpenHashSet(int capacity,
double loadFactor,
int growthChunk)
Creates a new hash set with a specified capacity, load factor, and absolute growth factor. 
Method Summary  
boolean 
add(byte v)
Adds an element to this collection. 
void 
clear()
Clears this collection. 
Object 
clone()
Returns a clone of this hash set. 
boolean 
contains(byte v)
Indicates whether this collection contains a specified element. 
int 
hashCode()
Returns a hash code value for this collection. 
ByteIterator 
iterator()
Returns an iterator over this collection. 
boolean 
remove(byte v)
Removes a specified element from this collection. 
int 
size()
Returns the number of elements in this collection. 
byte[] 
toArray(byte[] a)
Returns the elements of this collection as an array. 
void 
trimToSize()
Minimizes the memory used by this collection. 
Methods inherited from class bak.pcj.set.AbstractByteSet 
equals 
Methods inherited from class bak.pcj.AbstractByteCollection 
addAll, containsAll, isEmpty, removeAll, retainAll, toArray, toString 
Methods inherited from class java.lang.Object 
finalize, getClass, notify, notifyAll, wait, wait, wait 
Methods inherited from interface bak.pcj.ByteCollection 
addAll, containsAll, equals, isEmpty, removeAll, retainAll, toArray 
Field Detail 
public static final double DEFAULT_GROWTH_FACTOR
public static final int DEFAULT_GROWTH_CHUNK
public static final int DEFAULT_CAPACITY
public static final double DEFAULT_LOAD_FACTOR
Constructor Detail 
public ByteOpenHashSet()
public ByteOpenHashSet(ByteCollection c)
c
 the collection whose elements to add to the new
set.
NullPointerException
 if c is null.public ByteOpenHashSet(byte[] a)
a
 the array whose elements to add to the new
set.
NullPointerException
 if a is null.public ByteOpenHashSet(int capacity)
capacity
 the initial capacity of the set.
IllegalArgumentException
 if capacity is negative.public ByteOpenHashSet(double loadFactor)
loadFactor
 the load factor of the set.
IllegalArgumentException
 if loadFactor is negative or zero.public ByteOpenHashSet(int capacity, double loadFactor)
capacity
 the initial capacity of the set.loadFactor
 the load factor of the set.
IllegalArgumentException
 if capacity is negative;
if loadFactor is not positive.public ByteOpenHashSet(int capacity, double loadFactor, double growthFactor)
The set capacity increases to capacity()*(1+growthFactor). This strategy is good for avoiding many capacity increases, but the amount of wasted memory is approximately the size of the set.
capacity
 the initial capacity of the set.loadFactor
 the load factor of the set.growthFactor
 the relative amount with which to increase the
the capacity when a capacity increase is needed.
IllegalArgumentException
 if capacity is negative;
if loadFactor is not positive;
if growthFactor is not positive.public ByteOpenHashSet(int capacity, double loadFactor, int growthChunk)
The set capacity increases to capacity()+growthChunk. This strategy is good for avoiding wasting memory. However, an overhead is potentially introduced by frequent capacity increases.
capacity
 the initial capacity of the set.loadFactor
 the load factor of the set.growthChunk
 the absolute amount with which to increase the
the capacity when a capacity increase is needed.
IllegalArgumentException
 if capacity is negative;
if loadFactor is not positive;
if growthChunk is not positive.public ByteOpenHashSet(ByteHashFunction keyhash)
keyhash
 the hash function to use when hashing keys.
NullPointerException
 if keyhash is null.public ByteOpenHashSet(ByteHashFunction keyhash, int capacity)
keyhash
 the hash function to use when hashing keys.capacity
 the initial capacity of the set.
IllegalArgumentException
 if capacity is negative.
NullPointerException
 if keyhash is null.public ByteOpenHashSet(ByteHashFunction keyhash, double loadFactor)
keyhash
 the hash function to use when hashing keys.loadFactor
 the load factor of the set.
IllegalArgumentException
 if loadFactor is negative or zero.
NullPointerException
 if keyhash is null.public ByteOpenHashSet(ByteHashFunction keyhash, int capacity, double loadFactor)
keyhash
 the hash function to use when hashing keys.capacity
 the initial capacity of the set.loadFactor
 the load factor of the set.
IllegalArgumentException
 if capacity is negative;
if loadFactor is not positive.
NullPointerException
 if keyhash is null.public ByteOpenHashSet(ByteHashFunction keyhash, int capacity, double loadFactor, double growthFactor)
The set capacity increases to capacity()*(1+growthFactor). This strategy is good for avoiding many capacity increases, but the amount of wasted memory is approximately the size of the set.
keyhash
 the hash function to use when hashing keys.capacity
 the initial capacity of the set.loadFactor
 the load factor of the set.growthFactor
 the relative amount with which to increase the
the capacity when a capacity increase is needed.
IllegalArgumentException
 if capacity is negative;
if loadFactor is not positive;
if growthFactor is not positive.
NullPointerException
 if keyhash is null.public ByteOpenHashSet(ByteHashFunction keyhash, int capacity, double loadFactor, int growthChunk)
keyhash
 the hash function to use when hashing keys.
The set capacity increases to capacity()+growthChunk. This strategy is good for avoiding wasting memory. However, an overhead is potentially introduced by frequent capacity increases.
capacity
 the initial capacity of the set.loadFactor
 the load factor of the set.growthChunk
 the absolute amount with which to increase the
the capacity when a capacity increase is needed.
IllegalArgumentException
 if capacity is negative;
if loadFactor is not positive;
if growthChunk is not positive.
NullPointerException
 if keyhash is null.Method Detail 
public boolean add(byte v)
ByteCollection
add
in interface ByteCollection
add
in class AbstractByteCollection
public ByteIterator iterator()
ByteCollection
iterator
in interface ByteCollection
public void trimToSize()
ByteCollection
trimToSize
in interface ByteCollection
trimToSize
in class AbstractByteCollection
public Object clone()
public int size()
ByteCollection
size
in interface ByteCollection
size
in class AbstractByteCollection
public void clear()
ByteCollection
clear
in interface ByteCollection
clear
in class AbstractByteCollection
public boolean contains(byte v)
ByteCollection
contains
in interface ByteCollection
contains
in class AbstractByteCollection
public int hashCode()
ByteCollection
hashCode
in interface ByteCollection
hashCode
in class AbstractByteSet
public boolean remove(byte v)
ByteCollection
remove
in interface ByteCollection
remove
in class AbstractByteCollection
public byte[] toArray(byte[] a)
ByteCollection
toArray
in interface ByteCollection
toArray
in class AbstractByteCollection

PCJ API Version 1.2 

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