SinglePointCrossover (Jenetics 6.2.0)

java.lang.Object
- io.jenetics.AbstractAlterer<G,C>
- - io.jenetics.Recombinator<G,C>
  - - io.jenetics.Crossover<G,C>
    - - io.jenetics.MultiPointCrossover<G,C>
      - io.jenetics.SinglePointCrossover<G,C>

All Implemented Interfaces:

Alterer<G,C>
```
public class SinglePointCrossover<G extends Gene<?,G>,C extends Comparable<? super C>>
extends MultiPointCrossover<G,C>
```
Single point crossover
One or two children are created by taking two parent strings and cutting them at some randomly chosen site. E.g.

If we create a child and its complement we preserving the total number of genes in the population, preventing any genetic drift. Single-point crossover is the classic form of crossover. However, it produces very slow mixing compared with multi-point crossover or uniform crossover. For problems where the site position has some intrinsic meaning to the problem single-point crossover can lead to small disruption than multi-point or uniform crossover.

Since:

1.0

Version:

5.0

See Also:

MultiPointCrossover

Field Summary
- Fields inherited from class io.jenetics.AbstractAlterer
  _probability
- Fields inherited from interface io.jenetics.Alterer
  DEFAULT_ALTER_PROBABILITY

Constructor Summary

Constructors
Constructor	Description
`SinglePointCrossover()`	Create a new single point crossover object with crossover probability of `0.05`.
`SinglePointCrossover(double probability)`	Constructs an alterer with a given recombination probability.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected int`	`crossover(MSeq<G> that, MSeq<G> other)`	Template method which performs the crossover.
`String`	`toString()`

Methods inherited from class io.jenetics.MultiPointCrossover
crossoverPointCount

Methods inherited from class io.jenetics.Crossover
recombine

Methods inherited from class io.jenetics.Recombinator
alter, order

Methods inherited from class io.jenetics.AbstractAlterer
probability

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface io.jenetics.Alterer
andThen, compose

- Constructor Detail
  - SinglePointCrossover
```
public SinglePointCrossover(double probability)
```
    Constructs an alterer with a given recombination probability.
    
    Parameters:
    
    probability - the crossover probability.
    
    Throws:
    
    IllegalArgumentException - if the probability is not in the valid range of [0, 1].
  - SinglePointCrossover
```
public SinglePointCrossover()
```
    Create a new single point crossover object with crossover probability of 0.05.
- Method Detail
  - crossover
```
protected int crossover(MSeq<G> that,
                        MSeq<G> other)
```
    Description copied from class: Crossover
    
    Template method which performs the crossover. The arguments given are mutable non null arrays of the same length.
    
    Overrides:
    
    crossover in class MultiPointCrossover<G extends Gene<?,G>,C extends Comparable<? super C>>
    
    Parameters:
    
    that - the genes of the first chromosome
    
    other - the genes of the other chromosome
    
    Returns:
    
    the number of altered genes
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class MultiPointCrossover<G extends Gene<?,G>,C extends Comparable<? super C>>