jmetal.util
Class DistanceNode

java.lang.Object
  jmetal.util.DistanceNode

public class DistanceNode
extends java.lang.Object

This is an auxiliar class for calculating the SPEA2 environmental selection. Each instance of DistanceNode contains two parameter called reference_ and distance_. reference_ indicates one Solution in a SolutionSet and distance_ represents the distance_ to this solution.

Constructor Summary

DistanceNode(double distance, int reference)
Constructor.

Method Summary

double	getDistance() Gets the distance
int	getReference() Gets the reference
void	setDistance(double distance) Sets the distance to a Solution
void	setReferece(int reference) Sets the reference to a Solution

Methods inherited from class java.lang.Object

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

Constructor Detail

DistanceNode

public DistanceNode(double distance,
                    int reference)

Constructor.

Parameters:

distance - The distance to a Solution.

reference - The position of the Solution.

Method Detail

setDistance

public void setDistance(double distance)

Sets the distance to a Solution

Parameters:

distance - The distance

setReferece

public void setReferece(int reference)

Sets the reference to a Solution

Parameters:

reference - The reference

getDistance

public double getDistance()

Gets the distance

Returns:

the distance

getReference

public int getReference()

Gets the reference

Returns:

the reference