jsat.utils

Class LongDoubleMap

java.lang.Object

java.util.AbstractMap<java.lang.Long,java.lang.Double>

jsat.utils.LongDoubleMap

All Implemented Interfaces:

java.util.Map<java.lang.Long,java.lang.Double>

public final class LongDoubleMap
extends java.util.AbstractMap<java.lang.Long,java.lang.Double>

A hash map for storing the primitive types of long (as keys) to doubles (as table). The implementation is based on Algorithm D (Open addressing with double hashing) from Knuth's TAOCP page 528.

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

java.util.AbstractMap.SimpleEntry<K,V>, java.util.AbstractMap.SimpleImmutableEntry<K,V>

Nested classes/interfaces inherited from interface java.util.Map

java.util.Map.Entry<K,V>

Constructor Summary

Constructors

Constructor and Description
LongDoubleMap()
LongDoubleMap(int capacity)
LongDoubleMap(int capacity, float loadFactor)

Method Summary

Modifier and Type	Method and Description
void	clear()
boolean	containsKey(long key)
boolean	containsKey(java.lang.Object key)
java.util.Set<java.util.Map.Entry<java.lang.Long,java.lang.Double>>	entrySet()
static int	h(long key) Returns a non-negative hash value
double	increment(long key, double delta)
double	put(long key, double value)
java.lang.Double	put(java.lang.Long key, java.lang.Double value)
double	remove(long key)
java.lang.Double	remove(java.lang.Object key)
int	size()

Methods inherited from class java.util.AbstractMap

containsValue, equals, get, hashCode, isEmpty, keySet, putAll, toString, values

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, forEach, getOrDefault, merge, putIfAbsent, remove, replace, replace, replaceAll

Constructor Detail

LongDoubleMap

public LongDoubleMap()

LongDoubleMap

public LongDoubleMap(int capacity)

LongDoubleMap

public LongDoubleMap(int capacity,
                     float loadFactor)

Method Detail

size

public int size()

Specified by:

size in interface java.util.Map<java.lang.Long,java.lang.Double>

Overrides:

size in class java.util.AbstractMap<java.lang.Long,java.lang.Double>

put

public java.lang.Double put(java.lang.Long key,
                            java.lang.Double value)

Specified by:

put in interface java.util.Map<java.lang.Long,java.lang.Double>

Overrides:

put in class java.util.AbstractMap<java.lang.Long,java.lang.Double>

put

public double put(long key,
                  double value)

increment

public double increment(long key,
                        double delta)

Parameters:

key -

delta -

Returns:

the new value stored for the given key

remove

public java.lang.Double remove(java.lang.Object key)

Specified by:

remove in interface java.util.Map<java.lang.Long,java.lang.Double>

Overrides:

remove in class java.util.AbstractMap<java.lang.Long,java.lang.Double>

remove

public double remove(long key)

Parameters:

key -

Returns:

the old value stored for this key, or Double.NaN if the key was not present in the map

clear

public void clear()

Specified by:

clear in interface java.util.Map<java.lang.Long,java.lang.Double>

Overrides:

clear in class java.util.AbstractMap<java.lang.Long,java.lang.Double>

containsKey

public boolean containsKey(java.lang.Object key)

Specified by:

containsKey in interface java.util.Map<java.lang.Long,java.lang.Double>

Overrides:

containsKey in class java.util.AbstractMap<java.lang.Long,java.lang.Double>

containsKey

public boolean containsKey(long key)

h

public static int h(long key)

Returns a non-negative hash value

Parameters:

key -

Returns:

entrySet

public java.util.Set<java.util.Map.Entry<java.lang.Long,java.lang.Double>> entrySet()

Specified by:

entrySet in interface java.util.Map<java.lang.Long,java.lang.Double>

Specified by:

entrySet in class java.util.AbstractMap<java.lang.Long,java.lang.Double>