org.moeaframework.core.operator
Class TwoPointCrossover

java.lang.Object
  org.moeaframework.core.operator.TwoPointCrossover

All Implemented Interfaces:

Variation

public class TwoPointCrossover
extends Object
implements Variation

Two-point crossover. Two crossover points are selected and all decision variables between the two points are swapped between the two parents. The two children resulting from this swapping are returned.

Constructor Summary

TwoPointCrossover(double probability)
Constructs a two-point crossover operator with the specified probability of applying this operator to solutions.

Method Summary

Solution[]	evolve(Solution[] parents) Evolves one or more parent solutions (specified by getArity) and produces one or more child solutions.
int	getArity() Returns the number of solutions that must be supplied to the evolve method.
double	getProbability() Returns the probability of applying this operator to solutions.

Methods inherited from class java.lang.Object

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

Constructor Detail

TwoPointCrossover

public TwoPointCrossover(double probability)

Constructs a two-point crossover operator with the specified probability of applying this operator to solutions.

Parameters:

probability - the probability of applying this operator to solutions

Method Detail

getProbability

public double getProbability()

Returns the probability of applying this operator to solutions.

Returns:

the probability of applying this operator to solutions

evolve

public Solution[] evolve(Solution[] parents)

Description copied from interface: Variation

Evolves one or more parent solutions (specified by getArity) and produces one or more child solutions. By contract, the parents must not be modified. The copy constructor should be used to create copies of the parents with these copies subsequently modified.

Specified by:

evolve in interface Variation

Parameters:

parents - the array of parent solutions

Returns:

an array of child solutions

getArity

public int getArity()

Description copied from interface: Variation

Returns the number of solutions that must be supplied to the evolve method.

Specified by:

getArity in interface Variation

Returns:

the number of solutions that must be supplied to the evolve method