math.rng

Class SplitMix64Seed

java.lang.Object

math.rng.SplitMix64Seed

public final class SplitMix64Seed
extends Object

The splitmix64() generator (here only used for seed generation) which is based on Guy Steele, Doug Lea, Christine Flood (2014) and has been included in Java 8 as SplittableRandom (this implementation uses a mixing function which is different from the one used in SplittableRandom.

Method Summary

Modifier and Type	Method and Description
static long	seed() Returns a statistically good long random seed.
static long[]	seed(int numLongs) Returns a statistically good long[] random seed array.
static long	seed(long seed) Computes a deterministic seed value from a given value.
static long	seed(long[] seed) Computes a deterministic seed value from a given sequence of seed values.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

seed

public static long seed()

Returns a statistically good long random seed.

Returns:

a random long seed

seed

public static long[] seed(int numLongs)

Returns a statistically good long[] random seed array.

Parameters:

numLongs - length (>= 0) of the seed array

Returns:

a random long[] seed array

seed

public static long seed(long seed)

Computes a deterministic seed value from a given value.

Parameters:

seed - the seed to start with

Returns:

a deterministically computed seed value

seed

public static long seed(long[] seed)

Computes a deterministic seed value from a given sequence of seed values.

Parameters:

seed - the sequence of seed values to start with

Returns:

a deterministically computed seed value