question: @ Override public void operate ( Population pop ) throws Exception { List < Individual > newIndividuals = new LinkedList < Individual > ( ) ; for ( int i = 0 ; i < pop . getNumberOfIndividuals ( ) ; i ++ ) { List < Individual > individuals = operate ( pop . get ( i ) ) ; newIndividuals . addAll ( individuals ) ; } pop . clear ( ) ; pop . addAllIndividuals ( newIndividuals ) ; }
target:  Operates on all individuals, removes the original individuals and adds the new ones.