Package etomica.util.random

Interface IRandom

All Known Implementing Classes:

RandomMersenneTwister, RandomNumberGenerator, RandomNumberGeneratorUnix

public interface IRandom

Interface for random number generation.

Method Summary

Modifier and Type	Method	Description
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).

Method Detail

nextDouble

double nextDouble()

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.

nextFixedDouble

double nextFixedDouble()

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.

nextInt

int nextInt(int maxInt)

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

nextGaussian

double nextGaussian()

Returns a pseudorandom double, Gaussian ("normally") distributed value with mean 0.0 and standard deviation 1.0.