Package jdistlib.rng

Class RandomCMWC

java.lang.Object

java.util.Random

jdistlib.rng.RandomEngine

jdistlib.rng.RandomCMWC

All Implemented Interfaces:

Serializable, RandomGenerator

public class RandomCMWC
extends RandomEngine

Implementation of CMWC4096 (Complementary-multiply-with-carry) random number generator by George Marsaglia. The period is approximately 2^131086.

Original post

Paper: Marsaglia, George. 2003. Random number generators. Journal of Modern Applied Statistical Methods, 2(1): 2-13. (link)

Weakness: The quality is dependent upon the choice of seed. Some seed actually may weaken the algorithm significantly. A known good seed is 362436. Marsaglia suggested that any seed less than 809430660 is fine, but many detractors criticize that it is not necessarily so.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.random.RandomGenerator

RandomGenerator.ArbitrarilyJumpableGenerator, RandomGenerator.JumpableGenerator, RandomGenerator.LeapableGenerator, RandomGenerator.SplittableGenerator, RandomGenerator.StreamableGenerator

Field Summary

Fields inherited from class jdistlib.rng.RandomEngine

mSeed

Constructor Summary

Constructors

Constructor	Description
RandomCMWC()

Method Summary

Modifier and Type	Method	Description
RandomCMWC	clone()
double	nextDouble()
float	nextFloat()
final double	nextGaussian()
final int	nextInt()
final int	nextInt(int n)
final long	nextLong()
final long	nextLong(long n)

Methods inherited from class jdistlib.rng.RandomEngine

getSeed, random, setSeed

Methods inherited from class java.util.Random

doubles, doubles, doubles, doubles, from, ints, ints, ints, ints, longs, longs, longs, longs, next, nextBoolean, nextBytes

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.random.RandomGenerator

isDeprecated, nextDouble, nextDouble, nextExponential, nextFloat, nextFloat, nextGaussian, nextInt, nextLong

Constructor Details

RandomCMWC

public RandomCMWC()

Method Details

nextInt

public final int nextInt()

Specified by:

nextInt in interface RandomGenerator

Specified by:

nextInt in class RandomEngine

nextInt

public final int nextInt(int n)

Specified by:

nextInt in interface RandomGenerator

Specified by:

nextInt in class RandomEngine

nextLong

public final long nextLong()

Specified by:

nextLong in interface RandomGenerator

Specified by:

nextLong in class RandomEngine

nextLong

public final long nextLong(long n)

Specified by:

nextLong in interface RandomGenerator

Specified by:

nextLong in class RandomEngine

nextGaussian

public final double nextGaussian()

Specified by:

nextGaussian in interface RandomGenerator

Specified by:

nextGaussian in class RandomEngine

nextDouble

public double nextDouble()

Specified by:

nextDouble in interface RandomGenerator

Specified by:

nextDouble in class RandomEngine

nextFloat

public float nextFloat()

Specified by:

nextFloat in interface RandomGenerator

Specified by:

nextFloat in class RandomEngine

clone

public RandomCMWC clone()

Specified by:

clone in class RandomEngine