Package etomica.util.random

Class RandomNumberGenerator

java.lang.Object

etomica.util.random.RandomNumberGenerator

All Implemented Interfaces:

IRandom

public class RandomNumberGenerator
extends java.lang.Object
implements IRandom

Random number generator class. This just wraps Java's own RNG.

Constructor Summary

Constructors

Constructor	Description
RandomNumberGenerator()
RandomNumberGenerator(long seed)

Method Summary

Modifier and Type	Method	Description
java.util.Random	getWrappedRandom()
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).
double	nextGaussian()	Returns a pseudorandom double, Gaussian ("normally") distributed value with mean 0.0 and standard deviation 1.0.
int	nextInt(int maxInt)	Returns a pseudorandom integer, uniformly distributed between 0 (inclusive) and maxInt (exclusive).

Methods inherited from class java.lang.Object

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

Constructor Detail

RandomNumberGenerator

public RandomNumberGenerator()

RandomNumberGenerator

public RandomNumberGenerator(long seed)

Method Detail

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

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

nextInt

public int nextInt(int maxInt)

Description copied from interface: IRandom

Returns a pseudorandom integer, uniformly distributed between 0 (inclusive) and maxInt (exclusive).

Specified by:

nextInt 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

getWrappedRandom

public java.util.Random getWrappedRandom()