org.jgap.util

Class ChromosomeFitnessComparator

java.lang.Object

org.jgap.util.ChromosomeFitnessComparator

All Implemented Interfaces:

java.util.Comparator

public class ChromosomeFitnessComparator
extends java.lang.Object
implements java.util.Comparator

Simple comparator to allow the sorting of Chromosome lists with the highest fitness value in first place of the list. Usage example: Collections.sort( population.getChromosomes(), new ChromosomeFitnessComparator() );

Since:

2.4

Constructor Summary

Constructors

Constructor and Description
ChromosomeFitnessComparator() Constructs the comparator using the DefaultFitnessEvaluator
ChromosomeFitnessComparator(FitnessEvaluator a_evaluator)

Method Summary

Modifier and Type	Method and Description
int	compare(java.lang.Object a_chromosome1, java.lang.Object a_chromosome2) Compares two chromosomes by using a FitnessEvaluator.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Detail

ChromosomeFitnessComparator

public ChromosomeFitnessComparator()

Constructs the comparator using the DefaultFitnessEvaluator

Since:

2.6

ChromosomeFitnessComparator

public ChromosomeFitnessComparator(FitnessEvaluator a_evaluator)

Parameters:

a_evaluator - the fitness evaluator to use

Since:

2.6

Method Detail

compare

public int compare(java.lang.Object a_chromosome1,
                   java.lang.Object a_chromosome2)

Compares two chromosomes by using a FitnessEvaluator.

Specified by:

compare in interface java.util.Comparator

Parameters:

a_chromosome1 - the first chromosome to compare

a_chromosome2 - the second chromosome to compare

Returns:

-1 if a_chromosome1 is fitter than a_chromosome2, 1 if it is the other way round and 0 if both are equal

Since:

2.6