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java.lang.Objectorg.apache.commons.math.random.BitsStreamGenerator
org.apache.commons.math.random.AbstractWell
org.apache.commons.math.random.Well512a
public class Well512a
This class implements the WELL512a 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.
| Field Summary |
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| Fields inherited from class org.apache.commons.math.random.AbstractWell |
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i1, i2, i3, index, iRm1, iRm2, v |
| Constructor Summary | |
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Well512a()
Creates a new random number generator. |
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Well512a(int seed)
Creates a new random number generator using a single int seed. |
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Well512a(int[] seed)
Creates a new random number generator using an int array seed. |
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Well512a(long seed)
Creates a new random number generator using a single long seed. |
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| Method Summary | |
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protected int |
next(int bits)
Generate next pseudorandom number. |
| Methods inherited from class org.apache.commons.math.random.AbstractWell |
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setSeed, setSeed, setSeed |
| Methods inherited from class org.apache.commons.math.random.BitsStreamGenerator |
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nextBoolean, nextBytes, nextDouble, nextFloat, nextGaussian, nextInt, nextInt, nextLong |
| Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
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public Well512a()
The instance is initialized using the current time as the seed.
public Well512a(int seed)
seed - the initial seed (32 bits integer)public Well512a(int[] seed)
seed - the initial seed (32 bits integers array), if null
the seed of the generator will be related to the current timepublic Well512a(long seed)
seed - the initial seed (64 bits integer)| Method Detail |
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protected int next(int bits)
This method is the core generation algorithm. It is used by all the
public generation methods for the various primitive types BitsStreamGenerator.nextBoolean(), BitsStreamGenerator.nextBytes(byte[]), BitsStreamGenerator.nextDouble(),
BitsStreamGenerator.nextFloat(), BitsStreamGenerator.nextGaussian(), BitsStreamGenerator.nextInt(),
BitsStreamGenerator.next(int) and BitsStreamGenerator.nextLong().
next in class AbstractWellbits - number of random bits to produce
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