net.messagevortex

Class ExtendedSecureRandom

java.lang.Object

net.messagevortex.ExtendedSecureRandom

public final class ExtendedSecureRandom
extends Object

A Specialized random number generator for MessageVortex.

Constructor Summary

Constructors

Constructor and Description
ExtendedSecureRandom()

Method Summary

Modifier and Type	Method and Description
static byte[]	generateSeed(int i) Returns the given number of seed bytes, computed using the seed generation algorithm that this class uses to seed itself.
static SecureRandom	getSecureRandom() Returns an internal representation of the secure Random number generator.
static void	nextBytes(byte[] array) An array filled with random byte values.
static double	nextDouble() Returns the next pseudorandom, uniformly distributed double value between 0.0 and 1.0 from this random number generator's sequence.
static double	nextGauss() Returns a gaussian distributed value between 0 and 1 (maximum at 0.5).
static int	nextInt(int bound) Returns an integer between 0 and bound-1.
static int	nextInt(int low, int up) Returns an integer between low and up-1.
static double	nextRandomTime(long start, long peak, long end) Returns a random time.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExtendedSecureRandom

public ExtendedSecureRandom()

Method Detail

nextInt

public static int nextInt(int bound)

Returns an integer between 0 and bound-1.

Parameters:

bound - the maximum value to be used

Returns:

a random integer value between 0 and bound-1

nextInt

public static int nextInt(int low,
                          int up)

Returns an integer between low and up-1.

Parameters:

low - the minimum value to be returned

up - the maximum value to be used

Returns:

a random integer value between low and up-1

Throws:

IllegalArgumentException - if low >= up

nextBytes

public static void nextBytes(byte[] array)

An array filled with random byte values.

Parameters:

array - the array to be filled

generateSeed

public static byte[] generateSeed(int i)

Returns the given number of seed bytes, computed using the seed generation algorithm that this class uses to seed itself.

Parameters:

i - the number of bytes to be generated

Returns:

the seed bytes

nextDouble

public static double nextDouble()

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

Returns:

the next pseudorandom value

getSecureRandom

public static SecureRandom getSecureRandom()

Returns an internal representation of the secure Random number generator.

Returns:

the random number generator

nextGauss

public static double nextGauss()

Returns a gaussian distributed value between 0 and 1 (maximum at 0.5).

Returns:

a gaussian random value

nextRandomTime

public static double nextRandomTime(long start,
                                    long peak,
                                    long end)

Returns a random time.

Parameters:

start - the earliest allowed time

peak - the peak time (50% chance)

end - the latest time

Returns:

a gaussian random value