RandomMersenneTwister

java.lang.Object
- etomica.util.random.RandomMersenneTwister

All Implemented Interfaces:

IRandom
```
public class RandomMersenneTwister
extends java.lang.Object
implements IRandom
```
Mersenne Twister RNG. seed initialization and nextInt() methods written in C by Takuji Nishimura and Makoto Matsumoto as described above, and translated into Java.
Other methods added for the Java version.

Field Summary

Fields
Modifier and Type	Field	Description
`protected boolean`	`hasNextGaussian`
`protected static int`	`LOWER_MASK`
`protected static int`	`M`
`protected static int`	`MATRIX_A`
`protected int[]`	`mt`
`protected int`	`mti`
`protected static int`	`N`
`protected double`	`nextGaussian`
`protected int`	`savedSeed`
`protected int[]`	`savedSeedArray`
`protected static int`	`UPPER_MASK`

Constructor Summary

Constructors
Constructor	Description
`RandomMersenneTwister(int s)`	Creates a Mersenne Twister with the given seed.
`RandomMersenneTwister(int[] s)`	Creates a Mersenne Twister with the given array of seeds.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`getSeed()`
`int[]`	`getSeedArray()`
`double`	`nextDouble()`	Returns a pseudorandom double, uniformly distributed between 0.0 (exclusive) and 1.0 (exclusive).
`double`	`nextFixedDouble()`	Returns a pseudorandom double, uniformly distributed between 0.0 (inclusive) and 1.0 (exclusive).
`float`	`nextFloat()`
`double`	`nextGaussian()`	Returns a pseudorandom double, Gaussian ("normally") distributed value with mean 0.0 and standard deviation 1.0.
`int`	`nextInt()`
`int`	`nextInt(int max)`	Returns a random int ranging from 0 to max-1.
`long`	`nextLong()`
`void`	`setSeed(int s)`	Configures the RNG with the given seed.
`void`	`setSeedArray(int[] init_key)`	Configures the RNG with an array of seeds

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - N
```
protected static final int N
```
    See Also:
    
    Constant Field Values
  - M
```
protected static final int M
```
    See Also:
    
    Constant Field Values
  - MATRIX_A
```
protected static final int MATRIX_A
```
    See Also:
    
    Constant Field Values
  - UPPER_MASK
```
protected static final int UPPER_MASK
```
    See Also:
    
    Constant Field Values
  - LOWER_MASK
```
protected static final int LOWER_MASK
```
    See Also:
    
    Constant Field Values
  - mt
```
protected final int[] mt
```
  - mti
```
protected int mti
```
  - hasNextGaussian
```
protected boolean hasNextGaussian
```
  - nextGaussian
```
protected double nextGaussian
```
  - savedSeedArray
```
protected int[] savedSeedArray
```
  - savedSeed
```
protected int savedSeed
```
- Constructor Detail
  - RandomMersenneTwister
```
public RandomMersenneTwister(int s)
```
    Creates a Mersenne Twister with the given seed.
  - RandomMersenneTwister
```
public RandomMersenneTwister(int[] s)
```
    Creates a Mersenne Twister with the given array of seeds.
- Method Detail
  - getSeed
```
public int getSeed()
```
  - setSeed
```
public void setSeed(int s)
```
    Configures the RNG with the given seed.
  - getSeedArray
```
public int[] getSeedArray()
```
  - setSeedArray
```
public void setSeedArray(int[] init_key)
```
    Configures the RNG with an array of seeds
  - nextInt
```
public int nextInt()
```
  - nextLong
```
public long nextLong()
```
  - nextInt
```
public int nextInt(int max)
```
    Returns a random int ranging from 0 to max-1.
    
    Specified by:
    
    nextInt in interface IRandom
  - nextFixedDouble
```
public double nextFixedDouble()
```
    Description copied from interface: IRandom
    
    Returns a pseudorandom double, uniformly distributed between 0.0 (inclusive) and 1.0 (exclusive). For computational speed, this implementation returns a fixed-point random number (at least in binary), meaning that it will be a random integer times 2^-53.
    
    Specified by:
    
    nextFixedDouble in interface IRandom
  - nextDouble
```
public double nextDouble()
```
    Description copied from interface: IRandom
    
    Returns a pseudorandom double, uniformly distributed between 0.0 (exclusive) and 1.0 (exclusive). This is a floating-point value, meaning that the any double can be returned; the double can be arbitrarily small, but will not be 0.
    
    Specified by:
    
    nextDouble in interface IRandom
  - nextGaussian
```
public double nextGaussian()
```
    Description copied from interface: IRandom
    
    Returns a pseudorandom double, Gaussian ("normally") distributed value with mean 0.0 and standard deviation 1.0.
    
    Specified by:
    
    nextGaussian in interface IRandom
  - nextFloat
```
public float nextFloat()
```

Class RandomMersenneTwister

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

N

M

MATRIX_A

UPPER_MASK

LOWER_MASK

mt

mti

hasNextGaussian

nextGaussian

savedSeedArray

savedSeed

Constructor Detail

RandomMersenneTwister

RandomMersenneTwister

Method Detail

getSeed

setSeed

getSeedArray

setSeedArray

nextInt

nextLong

nextInt

nextFixedDouble

nextDouble

nextGaussian

nextFloat