Package io.github.olyutorskii.aletojio.rng.lcg

Class LcgRndInt32

java.lang.Object

io.github.olyutorskii.aletojio.rng.lcg.AbstractLcg

io.github.olyutorskii.aletojio.rng.lcg.LcgRndInt32

All Implemented Interfaces:

RndInt32

public class LcgRndInt32
extends AbstractLcg
implements RndInt32

Implementation of 32bit output Linear congruential generator(LCG).

LCG is a commonly used random number generator in the past.

Recurrence relation sequences : X(n+1) = (X(n) * Mul + Inc) mod Mod

• Mul : Multiplier
• Inc : Increment
• Mod : Modulus

See Also:

• Linear congruential generator (Wikipedia)

Field Summary

Fields inherited from class io.github.olyutorskii.aletojio.rng.lcg.AbstractLcg

MASK_B31, MASK_B32

Constructor Summary

Constructors

Constructor	Description
LcgRndInt32(long mulArg, long incArg, long modArg)	Constructor.

Method Summary

Modifier and Type	Method	Description
int	nextInt32()	Return next random number as 32bit int with random sign-bit.
protected int	seedToResult()	Calculate result number from seed.

Methods inherited from class io.github.olyutorskii.aletojio.rng.lcg.AbstractLcg

getSeed, nextIntImpl, nextSeed, setSeed

Methods inherited from class java.lang.Object

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

Constructor Details

LcgRndInt32

public LcgRndInt32(long mulArg,
 long incArg,
 long modArg)
            throws IllegalArgumentException

Constructor.

• Multiplier must be 1 or greatrer.
• Increment must be 0 or greatrer.
• Modulus must be 2 or greater.

Parameters:

mulArg - multiplier

incArg - increment

modArg - modulus

Throws:

IllegalArgumentException - illegal argument

Method Details

seedToResult

protected int seedToResult()

Calculate result number from seed.

result(32bit) reflects seed[16:47]

Specified by:

seedToResult in class AbstractLcg

Returns:

result number

nextInt32

public int nextInt32()

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

Specified by:

nextInt32 in interface RndInt32

Returns:

random number