Package org.moeaframework.core.comparator

Class FitnessComparator

java.lang.Object

org.moeaframework.core.comparator.FitnessComparator

All Implemented Interfaces:

Comparator<Solution>, DominanceComparator

public class FitnessComparator
extends Object
implements DominanceComparator, Comparator<Solution>

Compares two solutions based on their fitness value.

See Also:

• FitnessEvaluator

Constructor Summary

Constructors

Constructor	Description
FitnessComparator(boolean largerValuesPreferred)	Constructs a dominance comparator for comparing solutions based on their fitness value.

Method Summary

Modifier and Type	Method	Description
int	compare(Solution solution1, Solution solution2)	Compares the two solutions using a dominance relation, returning -1 if solution1 dominates solution2, 1 if solution2 dominates solution1, and 0 if the solutions are non-dominated.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Details

FitnessComparator

public FitnessComparator(boolean largerValuesPreferred)

Constructs a dominance comparator for comparing solutions based on their fitness value.

Parameters:

largerValuesPreferred - true if larger fitness values are preferred; otherwise smaller fitness values are preferred

Method Details

compare

public int compare(Solution solution1,
 Solution solution2)

Description copied from interface: DominanceComparator

Compares the two solutions using a dominance relation, returning -1 if solution1 dominates solution2, 1 if solution2 dominates solution1, and 0 if the solutions are non-dominated.

Specified by:

compare in interface Comparator<Solution>

Specified by:

compare in interface DominanceComparator

Parameters:

solution1 - the first solution

solution2 - the second solution

Returns:

-1 if solution1 dominates solution2, 1 if solution2 dominates solution1, and 0 if the solutions are non-dominated