RandomIntSource
, RestorableUniformRandomProvider
, UniformRandomProvider
public class MersenneTwister extends IntProvider
This generator features an extremely long period (219937-1) and 623-dimensional equidistribution up to 32 bits accuracy. The home page for this generator is located at http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html.
This generator is described in a paper by Makoto Matsumoto and Takuji Nishimura in 1998: Mersenne Twister: A 623-Dimensionally Equidistributed Uniform Pseudo-Random Number Generator, ACM Transactions on Modeling and Computer Simulation, Vol. 8, No. 1, January 1998, pp 3--30
This class is mainly a Java port of the 2002-01-26 version of the generator written in C by Makoto Matsumoto and Takuji Nishimura. Here is their original copyright:
Copyright (C) 1997 - 2002, Makoto Matsumoto and Takuji Nishimura, All rights reserved. |
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
Constructor | Description |
---|---|
MersenneTwister(int[] seed) |
Creates a new random number generator.
|
Modifier and Type | Method | Description |
---|---|---|
protected byte[] |
getStateInternal() |
Creates a snapshot of the RNG state.
|
int |
next() |
|
protected void |
setStateInternal(byte[] s) |
Resets the RNG to the given
state . |
checkIndex, checkStateSize, fillState, fillState, nextInt, nextLong, restoreState, saveState, toString
nextBoolean, nextBytes, nextBytes, nextDouble, nextFloat, nextInt, nextLong
public MersenneTwister(int[] seed)
seed
- Initial seed.protected byte[] getStateInternal()
getStateInternal
in class BaseProvider
protected void setStateInternal(byte[] s)
state
.setStateInternal
in class BaseProvider
s
- State (previously obtained by a call to
BaseProvider.getStateInternal()
).BaseProvider.checkStateSize(byte[],int)
public int next()
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