org.artoflife.util
Class RandomGenerator

java.lang.Object
  |
  +--org.artoflife.util.RandomGenerator

public class RandomGenerator

extends java.lang.Object

Each Thread gets its own RandomGenerator to use, which wraps a Random to generate pseudo-random numbers.

Author:

Steve Meyfroidt

Method Summary

static float	nextFloat()
static float	nextGaussian()
static int	nextInt(int limit)
static java.lang.Object	randomEntry(java.util.List list)
static void	restore(java.io.ObjectInputStream stream) Persist the random number generator to a stream.
static void	save(java.io.ObjectOutputStream stream) Persist the random number generator to a stream.
static void	setSeed(long seed)

Methods inherited from class java.lang.Object

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

Method Detail

setSeed

public static void setSeed(long seed)

See Also:

MersenneTwisterFast#setSeed(long)

nextGaussian

public static float nextGaussian()

Returns:

the next pseudorandom, Gaussian ("normally") distributed float value with mean 0.0 and standard deviation 1.0 from this random number generator's sequence.

See Also:

Random.nextGaussian()

nextFloat

public static float nextFloat()

Returns:

the next pseudorandom, uniformly distributed float value between 0.0 and 1.0 from this random number generator's sequence.

See Also:

Random.nextDouble()

nextInt

public static int nextInt(int limit)

Parameters:

limit - (exclusive) for the int returned, for example if 4, the returned int will be 0, 1, 2 or 3

See Also:

Random.nextInt(int)

randomEntry

public static java.lang.Object randomEntry(java.util.List list)

Parameters:

list - to choose a random entry from

Returns:

a random entry from the list or null if list is empty or null

save

public static void save(java.io.ObjectOutputStream stream)
                 throws java.io.IOException

Persist the random number generator to a stream.

java.io.IOException

See Also:

restore(java.io.ObjectInputStream)

restore

public static void restore(java.io.ObjectInputStream stream)
                    throws java.io.IOException,
                           java.lang.ClassNotFoundException

Persist the random number generator to a stream.

java.io.IOException

java.lang.ClassNotFoundException

See Also:

save(java.io.ObjectOutputStream)