org.jgap.util

Class randomJava

java.lang.Object

org.jgap.util.randomX

org.jgap.util.randomJava

public class randomJava
extends randomX

Implementation of a randomX-compliant class based upon the built-in Java.util.Random generator. Note that since the higher level result composition methods are different from those in the (undocumented) standard library, randomJava results will differ from those of the standard library for a given seed.

Designed and implemented in July 1996 by John Walker, kelvin@fourmilab.ch.

Constructor Summary

Constructors

Constructor and Description
randomJava() Creates a new pseudorandom number generator, seeded from the current time.
randomJava(long seed) Creates a new pseudorandom number generator with a specified seed.

Method Summary

Modifier and Type	Method and Description
byte	nextByte() Get next byte from generator.
void	setSeed(long seed) Set seed for generator.

Methods inherited from class org.jgap.util.randomX

nextBit, nextByte, nextByte, nextDouble, nextFloat, nextGaussian, nextInt, nextLong, nextShort, setSeed

Methods inherited from class java.lang.Object

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

Constructor Detail

randomJava

public randomJava()

Creates a new pseudorandom number generator, seeded from the current time.

randomJava

public randomJava(long seed)

Creates a new pseudorandom number generator with a specified seed.

Parameters:

seed - initial seed for the generator

Method Detail

setSeed

public void setSeed(long seed)

Set seed for generator. Subsequent values will be based on the given seed.

Parameters:

seed - seed for the generator

nextByte

public byte nextByte()

Get next byte from generator. To minimise calls on the underlying Java generator, integers are generated and individual bytes returned on subsequent calls. A call on setSeed() discards any bytes in the buffer.

Specified by:

nextByte in class randomX

Returns:

the next byte from the generator.