org.apache.commons.math.random

Class Well19937a

java.lang.Object

org.apache.commons.math.random.BitsStreamGenerator

org.apache.commons.math.random.AbstractWell

org.apache.commons.math.random.Well19937a

All Implemented Interfaces:

java.io.Serializable, RandomGenerator

public class Well19937a
extends AbstractWell

This class implements the WELL19937a pseudo-random number generator from François Panneton, Pierre L'Ecuyer and Makoto Matsumoto.

This generator is described in a paper by François Panneton, Pierre L'Ecuyer and Makoto Matsumoto Improved Long-Period Generators Based on Linear Recurrences Modulo 2 ACM Transactions on Mathematical Software, 32, 1 (2006). The errata for the paper are in wellrng-errata.txt.

Since:

2.2

See Also:

WELL Random number generator, Serialized Form

Constructor Summary

Constructors

Constructor and Description
Well19937a() Creates a new random number generator.
Well19937a(int seed) Creates a new random number generator using a single int seed.
Well19937a(int[] seed) Creates a new random number generator using an int array seed.
Well19937a(long seed) Creates a new random number generator using a single long seed.

Method Summary

Methods inherited from class org.apache.commons.math.random.AbstractWell

setSeed, setSeed, setSeed

Methods inherited from class org.apache.commons.math.random.BitsStreamGenerator

nextBoolean, nextBytes, nextDouble, nextFloat, nextGaussian, nextInt, nextInt, nextLong

Methods inherited from class java.lang.Object

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

Constructor Detail

Well19937a

public Well19937a()

Creates a new random number generator.

The instance is initialized using the current time as the seed.

Well19937a

public Well19937a(int seed)

Creates a new random number generator using a single int seed.

Parameters:

seed - the initial seed (32 bits integer)

Well19937a

public Well19937a(int[] seed)

Creates a new random number generator using an int array seed.

Parameters:

seed - the initial seed (32 bits integers array), if null the seed of the generator will be related to the current time

Well19937a

public Well19937a(long seed)

Creates a new random number generator using a single long seed.

Parameters:

seed - the initial seed (64 bits integer)