org.apache.commons.math.genetics
Class Chromosome

java.lang.Object
  extended by org.apache.commons.math.genetics.Chromosome
All Implemented Interfaces:
Comparable<Chromosome>, Fitness
Direct Known Subclasses:
AbstractListChromosome

public abstract class Chromosome
extends Object
implements Comparable<Chromosome>, Fitness

Individual in a population. Chromosomes are compared based on their fitness. The chromosomes are IMMUTABLE, and so their fitness is also immutable and therefore it can be cached.

Since:
2.0

Constructor Summary
Chromosome()
           
 
Method Summary
 int compareTo(Chromosome another)
          Compares two chromosomes based on their fitness.
 double getFitness()
          Access the fitness of this chromosome.
 void searchForFitnessUpdate(Population population)
          Searches the population for a chromosome representing the same solution, and if it finds one, updates the fitness to its value.
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.apache.commons.math.genetics.Fitness
fitness
 

Constructor Detail

Chromosome

public Chromosome()
Method Detail

getFitness

public double getFitness()
Access the fitness of this chromosome. The bigger the fitness, the better the chromosome. Computation of fitness is usually very time-consuming task, therefore the fitness is cached.

Returns:
the fitness.

compareTo

public int compareTo(Chromosome another)
Compares two chromosomes based on their fitness. The bigger the fitness, the better the chromosome.

Specified by:
compareTo in interface Comparable<Chromosome>
Parameters:
another - another chromosome to compare
Returns:
  • -1 if another is better than this
  • 1 if another is worse than this
  • 0 if the two chromosomes have the same fitness

searchForFitnessUpdate

public void searchForFitnessUpdate(Population population)
Searches the population for a chromosome representing the same solution, and if it finds one, updates the fitness to its value.

Parameters:
population - Population to search


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