01 /*
02 * CISELab, Computational and Intelligent Systems Engineering Laboratory
03 * Department of Engineering
04 * University of Sannio, 82100 Benevento (ITALY)
05 * web-site: www.ciselab.org
06 *
07 * JENES, A Java Library for Genetic Algorithms
08 * Copyright (C) 2009, Luigi Troiano
09 *
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
14 *
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
19 *
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with this library; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
23 02110-1301 USA
24 *
25 * COPYRIGHT DISCLAIMER
26 * CISELab, hereby disclaims all copyright interest in the
27 * library `JENES' (A Java Library for Genetic Algorithms)
28 * written by Luigi Troiano et al.
29 *
30 * Luigi Troiano, 1 January 2009
31 * CISELab Coordinator
32 */
33 package jenes.tutorials.problem2;
34
35 import jenes.GeneticAlgorithm;
36 import jenes.chromosome.IntegerChromosome;
37 import jenes.population.Individual;
38 import jenes.population.Population;
39
40 public class PatternGA extends GeneticAlgorithm<IntegerChromosome>{
41
42 private int[] target;
43 private int precision;
44
45 public PatternGA(Population<IntegerChromosome> pop, int numGen) {
46 super(pop,numGen);
47 this.setBiggerIsBetter(false);
48 }
49
50 public void setTarget(int[] target) {
51 this.target = target;
52 }
53
54 public void setPrecision(int precision) {
55 this.precision = precision;
56 }
57
58 @Override
59 protected void evaluateIndividual(Individual<IntegerChromosome> individual) {
60 IntegerChromosome chrom = individual.getChromosome();
61 int diff = 0;
62 int length=chrom.length();
63 for(int i=0;i<length;i++){
64 diff += Math.abs(chrom.getValue(i)-this.target[i]);
65 }
66 individual.setScore(diff);
67 }
68
69 @Override
70 protected boolean end(){
71 jenes.population.Population.Statistics stat = this.getCurrentPopulation().getStatistics();
72 return stat.getLegalLowestScore() <= this.precision;
73 }
74 } |
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