Selector

All Known Implementing Classes:

AlternativeNsga2, ElitismSelector, Nsga2, ScalingNsga2, SelectorDefault, Spea2
```
public interface Selector
```
The interface Selector is used to select a certain subset of Individuals from a Population by respecting certain metrics like their fitness. The core methods are getParents(int, java.util.Collection<org.opt4j.core.Individual>), that returns a set of Individuals that can be used as parents for the next generation and getLames(int, java.util.Collection<org.opt4j.core.Individual>), that returns a list of Individuals that can be removed from the given individual list in order to form the next generation.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Collection<Individual>`	`getLames(int lambda, Collection<Individual> population)`	Selects a subset of `lambda` `Individual`s and returns it as a new `Collection`.
`Collection<Individual>`	`getParents(int mu, Collection<Individual> population)`	Selects a subset of `Individual`s and returns it as a new `Collection`.
`void`	`init(int maxsize)`	Sets the maximal number of `Individual`s.

- Method Detail
  - getParents
```
Collection<Individual> getParents(int mu,
                                  Collection<Individual> population)
```
    Selects a subset of Individuals and returns it as a new Collection. These so called parents can be used to form the next generation.
    
    Parameters:
    
    mu - the number of parents to select
    
    population - the list of individuals
    
    Returns:
    
    the parents
  - getLames
```
Collection<Individual> getLames(int lambda,
                                Collection<Individual> population)
```
    Selects a subset of lambda Individuals and returns it as a new Collection. These individuals can be erased in the next generation.
    
    Parameters:
    
    lambda - the number of lames to select
    
    population - the list of individuals
    
    Returns:
    
    the worst lambda individuals
  - init
```
void init(int maxsize)
```
    Sets the maximal number of Individuals.
    
    Parameters:
    
    maxsize - the number of individuals