org.jenetics

Class SwapMutator<G extends Gene<?,G>,C extends Comparable<? super C>>

java.lang.Object

org.jenetics.AbstractAlterer<G,C>

org.jenetics.Mutator<G,C>

org.jenetics.SwapMutator<G,C>

All Implemented Interfaces:

Alterer<G,C>

public class SwapMutator<G extends Gene<?,G>,C extends Comparable<? super C>>
extends Mutator<G,C>

The SwapMutation changes the order of genes in a chromosome, with the hope of bringing related genes closer together, thereby facilitating the production of building blocks. This mutation operator can also be used for combinatorial problems, where no duplicated genes within a chromosome are allowed, e.g. for the TSP.

Since:

1.0

Version:

3.0 — $Date: 2014-12-28 $

Author:

Franz Wilhelmstötter

Field Summary

Fields inherited from class org.jenetics.AbstractAlterer

_probability

Fields inherited from interface org.jenetics.Alterer

DEFAULT_ALTER_PROBABILITY

Constructor Summary

Constructors

Constructor and Description
SwapMutator() Default constructor, with default mutation probability (Alterer.DEFAULT_ALTER_PROBABILITY).
SwapMutator(double probability) Constructs an alterer with a given recombination probability.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj)
int	hashCode()
protected int	mutate(MSeq<G> genes, double p) Swaps the genes in the given array, with the mutation probability of this mutation.
String	toString()

Methods inherited from class org.jenetics.Mutator

alter

Methods inherited from class org.jenetics.AbstractAlterer

getProbability

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.jenetics.Alterer

andThen, compose, of

Constructor Detail

SwapMutator

public SwapMutator(double probability)

Constructs an alterer with a given recombination probability.

Parameters:

probability - the crossover probability.

Throws:

IllegalArgumentException - if the probability is not in the valid range of [0, 1].

SwapMutator

public SwapMutator()

Default constructor, with default mutation probability (Alterer.DEFAULT_ALTER_PROBABILITY).

Method Detail

mutate

protected int mutate(MSeq<G> genes,
                     double p)

Swaps the genes in the given array, with the mutation probability of this mutation.

Overrides:

mutate in class Mutator<G extends Gene<?,G>,C extends Comparable<? super C>>

Parameters:

genes - the genes to mutate.

p - the gene mutation probability.

Returns:

the number of performed mutations

hashCode

public int hashCode()

Overrides:

hashCode in class Mutator<G extends Gene<?,G>,C extends Comparable<? super C>>

equals

public boolean equals(Object obj)

Overrides:

equals in class Mutator<G extends Gene<?,G>,C extends Comparable<? super C>>

toString

public String toString()

Overrides:

toString in class Mutator<G extends Gene<?,G>,C extends Comparable<? super C>>