Package libai.genetics.chromosomes

Class IntegerChromosome

java.lang.Object

libai.genetics.chromosomes.Chromosome

libai.genetics.chromosomes.IntegerChromosome

public class IntegerChromosome
extends Chromosome

Implementation of a permutation chromosome.

Field Summary

Fields

Modifier and Type	Field	Description
protected int[]	genes	The genetic charge
protected java.util.Random	random

Constructor Summary

Constructors

Modifier	Constructor	Description
	IntegerChromosome()
protected	IntegerChromosome(int length, java.util.Random random)
protected	IntegerChromosome(IntegerChromosome b)

Method Summary

Modifier and Type	Method	Description
Chromosome[]	cross(Chromosome b, int position)	Cross the chromosomes, using a mask template.
Chromosome	getCopy()	Clone this chromosome.
int[]	getGenes()
protected Chromosome	getInstance(int[] genes, java.util.Random random)	Create a new instance of a Chromosome with this int array.
Chromosome	getInstance(int length, java.util.Random random)	Creates a new chromosome with a length of length
Chromosome	mutate(double pm)	Swap two position of the genes.
java.lang.String	toString()

Methods inherited from class libai.genetics.chromosomes.Chromosome

getChance, getFitness, getFitnessReal, setChance, setFitness, setFitnessReal

Methods inherited from class java.lang.Object

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

Field Detail

genes

protected int[] genes

The genetic charge

random

protected java.util.Random random

Constructor Detail

IntegerChromosome

public IntegerChromosome()

IntegerChromosome

protected IntegerChromosome(int length,
                            java.util.Random random)

IntegerChromosome

protected IntegerChromosome(IntegerChromosome b)

Method Detail

cross

public Chromosome[] cross(Chromosome b,
                          int position)

Cross the chromosomes, using a mask template. The position parameter is omitted. A random mask is generated. The first offspring takes the genes of this if the mask value is true. The second offspring takes the genes of the other parent if the mask value is false. Then for the empty positions, the first not contained genes of the other parent are taken until the chromosomes are completely fill.

Specified by:

cross in class Chromosome

Parameters:

b - Chromosome to cross

position - Omitted.

Returns:

A two position array with the new offsprings.

mutate

public Chromosome mutate(double pm)

Swap two position of the genes. The positions are selected with probability pm

Specified by:

mutate in class Chromosome

Parameters:

pm - Mutation probability.

Returns:

The new mutated chromosome.

getInstance

protected Chromosome getInstance(int[] genes,
                                 java.util.Random random)

Create a new instance of a Chromosome with this int array.

Parameters:

genes - The genetic charge to copy.

Returns:

A new chromosome with the same genetic charge.

getCopy

public Chromosome getCopy()

Clone this chromosome.

Specified by:

getCopy in class Chromosome

Returns:

A identical chromosome of this.

getInstance

public Chromosome getInstance(int length,
                              java.util.Random random)

Creates a new chromosome with a length of length

Specified by:

getInstance in class Chromosome

Parameters:

length - The length of the new chromosome.

Returns:

A new instance of length length

getGenes

public int[] getGenes()

Returns:

The genetic charge of this chromosome.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object