peersim.util
Class ExtendedRandom

java.lang.Object
  java.util.Random
      peersim.util.ExtendedRandom

All Implemented Interfaces:

java.io.Serializable

public class ExtendedRandom
extends java.util.Random

Extends the functionality of java.util.Random.

See Also:

Serialized Form

Constructor Summary

ExtendedRandom(long seed)
Calls super constructor.

Method Summary

long	getLastSeed() Returns the last random seed that was set explicitly.
long	nextLong(long n) Implements nextLong(long) the same way nexInt(int) is implemented in java.util.Random.
int	nextPoisson(double mean) Extracts the next integer, according to a Poisson distribution.
void	setSeed(long seed) Sets random seed.

Methods inherited from class java.util.Random

next, 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

ExtendedRandom

public ExtendedRandom(long seed)

Calls super constructor. Also stores the seed to be returned by getLastSeed().

Method Detail

nextPoisson

public int nextPoisson(double mean)

Extracts the next integer, according to a Poisson distribution.

Parameters:

mean - The mean of the Poisson distribution.

Returns:

An integer Poisson extraction.

nextLong

public long nextLong(long n)

Implements nextLong(long) the same way nexInt(int) is implemented in java.util.Random.

Parameters:

n - the bound on the random number to be returned. Must be positive.

Returns:

a pseudorandom, uniformly distributed long value between 0 (inclusive) and n (exclusive).

setSeed

public void setSeed(long seed)

Sets random seed. Calls super method but also stores the seed to be returned by getLastSeed().

Overrides:

setSeed in class java.util.Random

getLastSeed

public long getLastSeed()

Returns the last random seed that was set explicitly. Either at construction time or through setSeed(long).