gridsim.util
Class LCGRandom

Object
  gridsim.util.LCGRandom

public class LCGRandom

extends Object

Basic random number generator. It is a multiplicative Linear Congruential Generator (LCG). The generator can be adjusted simply by changing the constants MULTIPIER and MODULUS (be careful). The complete generated stream of MODULUS numbers is split into MAX_STREAMS (stream from 0 to MAX_STREAMS - 1) by appropriate setting of the SEED array (again be careful).
NOTE: This class is taken from JSim.

Since:

GridSim Toolkit 4.1

Field Summary

static int

MAX_STREAMS

Constructor Summary

LCGRandom(int stream)
Constructs an LCG-based Random Number Generator.

Method Summary

double	gen() Generates a real-valued random number in the range 0 to 1.
Double[]	getParameters() Get the parameters of the constuctor
long	igen() Generates an integer-valued random number in the range 0 to MODULUS - 1.
void	incrStream()

Methods inherited from class Object

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

Field Detail

MAX_STREAMS

public static final int MAX_STREAMS

See Also:

Constant Field Values

Constructor Detail

LCGRandom

public LCGRandom(int stream)

Constructs an LCG-based Random Number Generator.

Parameters:

stream - stream number (integer from 0 to MAX_STREAMS - 1)

Method Detail

incrStream

public void incrStream()

getParameters

public Double[] getParameters()

Get the parameters of the constuctor

gen

public double gen()

Generates a real-valued random number in the range 0 to 1.

Returns:

double random number

igen

public long igen()

Generates an integer-valued random number in the range 0 to MODULUS - 1.

Returns:

long integer-valued random number