freenet.support.math

Class MersenneTwister

java.lang.Object

java.util.Random

org.spaceroots.mantissa.random.MersenneTwister

freenet.support.math.MersenneTwister

All Implemented Interfaces:

java.io.Serializable

public class MersenneTwister
extends org.spaceroots.mantissa.random.MersenneTwister

This is a synchronized wrapper around MersenneTwister which also adds additional setSeed() methods.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
MersenneTwister() Creates a new random number generator using the current time as the seed.
MersenneTwister(byte[] seed) Creates a new random number generator using a byte array seed.
MersenneTwister(int seed) Creates a new random number generator using a single int seed.
MersenneTwister(int[] seed) Creates a new random number generator using an int array seed.
MersenneTwister(long seed) Creates a new random number generator using a single long seed.

Method Summary

Modifier and Type	Method and Description
protected int	next(int bits)
void	setSeed(byte[] seed) Reinitialize the generator as if just built with the given byte array seed.
void	setSeed(int seed)
void	setSeed(int[] seed)
void	setSeed(long seed)

Methods inherited from class java.util.Random

doubles, doubles, doubles, doubles, ints, ints, ints, ints, longs, longs, longs, longs, nextBoolean, nextBytes, nextDouble, nextFloat, nextGaussian, nextInt, nextInt, nextLong

Methods inherited from class java.lang.Object

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

Constructor Detail

MersenneTwister

public MersenneTwister()

Creates a new random number generator using the current time as the seed.

MersenneTwister

public MersenneTwister(int seed)

Creates a new random number generator using a single int seed.

MersenneTwister

public MersenneTwister(int[] seed)

Creates a new random number generator using an int array seed.

MersenneTwister

public MersenneTwister(long seed)

Creates a new random number generator using a single long seed.

MersenneTwister

public MersenneTwister(byte[] seed)

Creates a new random number generator using a byte array seed.

Method Detail

setSeed

public void setSeed(int seed)

Overrides:

setSeed in class org.spaceroots.mantissa.random.MersenneTwister

setSeed

public void setSeed(int[] seed)

Overrides:

setSeed in class org.spaceroots.mantissa.random.MersenneTwister

setSeed

public void setSeed(long seed)

Overrides:

setSeed in class org.spaceroots.mantissa.random.MersenneTwister

setSeed

public void setSeed(byte[] seed)

Reinitialize the generator as if just built with the given byte array seed.

The state of the generator is exactly the same as a new generator built with the same seed.

Parameters:

seed - the initial seed (8 bits byte array), if null the seed of the generator will be related to the current time

next

protected int next(int bits)

Overrides:

next in class org.spaceroots.mantissa.random.MersenneTwister