org.uma.jmetal.runner.multiobjective.NSGAIITSPRunner Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of jmetal-exec Show documentation
Runners classes
There is a newer version: 5.9
package org.uma.jmetal.runner.multiobjective;

import org.uma.jmetal.algorithm.Algorithm;
import org.uma.jmetal.algorithm.multiobjective.nsgaii.NSGAIIBuilder;
import org.uma.jmetal.operator.CrossoverOperator;
import org.uma.jmetal.operator.MutationOperator;
import org.uma.jmetal.operator.SelectionOperator;
import org.uma.jmetal.operator.impl.crossover.PMXCrossover;
import org.uma.jmetal.operator.impl.mutation.PermutationSwapMutation;
import org.uma.jmetal.operator.impl.selection.BinaryTournamentSelection;
import org.uma.jmetal.problem.PermutationProblem;
import org.uma.jmetal.problem.multiobjective.MultiobjectiveTSP;
import org.uma.jmetal.runner.AbstractAlgorithmRunner;
import org.uma.jmetal.solution.PermutationSolution;
import org.uma.jmetal.util.AlgorithmRunner;
import org.uma.jmetal.util.JMetalException;
import org.uma.jmetal.util.JMetalLogger;
import org.uma.jmetal.util.comparator.RankingAndCrowdingDistanceComparator;
import org.uma.jmetal.util.fileoutput.SolutionListOutput;
import org.uma.jmetal.util.fileoutput.impl.DefaultFileOutputContext;
import org.uma.jmetal.util.pseudorandom.JMetalRandom;

import java.io.IOException;
import java.util.List;

/**
 * Class for configuring and running the NSGA-II algorithm to solve the bi-objective TSP
 *
 * @author Antonio J. Nebro 
 */

public class NSGAIITSPRunner extends AbstractAlgorithmRunner {
  /**
   * @param args Command line arguments.
   * @throws java.io.IOException
   * @throws SecurityException
   * @throws ClassNotFoundException
   * Invoking command:
  java org.uma.jmetal.runner.multiobjective.NSGAIITSPRunner problemName [referenceFront]
   */
  public static void main(String[] args) throws JMetalException, IOException {
    JMetalRandom.getInstance().setSeed(100L);

    PermutationProblem> problem;
    Algorithm>> algorithm;
    CrossoverOperator> crossover;
    MutationOperator> mutation;
    SelectionOperator>, PermutationSolution> selection;

    problem = new MultiobjectiveTSP("/tspInstances/kroA100.tsp", "/tspInstances/kroB100.tsp");

    crossover = new PMXCrossover(0.9) ;

    double mutationProbability = 0.2 ;
    mutation = new PermutationSwapMutation(mutationProbability) ;

    selection = new BinaryTournamentSelection>(new RankingAndCrowdingDistanceComparator>());

    algorithm = new NSGAIIBuilder>(problem, crossover, mutation)
            .setSelectionOperator(selection)
            .setMaxEvaluations(10000)
            .setPopulationSize(100)
            .build() ;

    AlgorithmRunner algorithmRunner = new AlgorithmRunner.Executor(algorithm)
            .execute() ;

    List> population = algorithm.getResult() ;
    long computingTime = algorithmRunner.getComputingTime() ;

    new SolutionListOutput(population)
            .setSeparator("\t")
            .setVarFileOutputContext(new DefaultFileOutputContext("VAR.tsv"))
            .setFunFileOutputContext(new DefaultFileOutputContext("FUN.tsv"))
            .print();

    JMetalLogger.logger.info("Total execution time: " + computingTime + "ms");
    JMetalLogger.logger.info("Random seed: " + JMetalRandom.getInstance().getSeed());
    JMetalLogger.logger.info("Objectives values have been written to file FUN.tsv");
    JMetalLogger.logger.info("Variables values have been written to file VAR.tsv");
  }
}