Package io.github.olyutorskii.aletojio.rng.xorsft

Class XorShift128

java.lang.Object

io.github.olyutorskii.aletojio.rng.xorsft.XorShift128

All Implemented Interfaces:

RndInt32

public class XorShift128
extends Object
implements RndInt32

xorshift (128bit) Pseudo Random Generator.

Warning: The default seed value will give a very biased result.

See Also:

• Xorshift (Wikipedia)
• Xorshift RNGs

Constructor Summary

Constructors

Constructor	Description
XorShift128()	Constructor.

Method Summary

Modifier and Type	Method	Description
int	nextInt32()	Return next random number as 32bit int with random sign-bit.
void	setSeed(int s0Arg, int s1Arg, int s2Arg, int s3Arg)	Set seed.

Methods inherited from class java.lang.Object

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

Constructor Details

XorShift128

public XorShift128()

Constructor.

Warning: The default seed value will give a very biased result.

Method Details

nextInt32

public int nextInt32()

Return next random number as 32bit int with random sign-bit.

Specified by:

nextInt32 in interface RndInt32

Returns:

random number

setSeed

public void setSeed(int s0Arg,
 int s1Arg,
 int s2Arg,
 int s3Arg)
             throws IllegalArgumentException

Set seed.

At least one seed must be non-zero.

Parameters:

s0Arg - seed0

s1Arg - seed1

s2Arg - seed2

s3Arg - seed3

Throws:

IllegalArgumentException - At least one seed must be non-zero