quasirandomindicesgenerator.java

用于求解TSP(Traveling salesman problem

/**
 * Description: For generating random number.
 *
 * @ Author        Create/Modi     Note
 * Xiaofeng Xie    NOv 01, 2005
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * Please acknowledge the author(s) if you use this code in any way.
 *
 * @version 1.0
 * @Since MAOS1.0
 */

package Global.util;

import java.util.*;
import Global.methods.*;

public class QuasiRandomIndicesGenerator {
  private Vector indicesArray = new Vector();

  public QuasiRandomIndicesGenerator(int maxNum, int times) {
    this(maxNum, times, 100);
  }

  public QuasiRandomIndicesGenerator(int maxNum, int times, int quasiN) {
    init(maxNum, times, quasiN);
  }

  public void init(int maxNum, int times, int quasiN){
    indicesArray.clear();
    for (int i=0; i<quasiN; i++) {
      indicesArray.add(RandomGenerator.randomDistinctSelection(maxNum, times));
    }
  }

  public int[] randomDistinctSelection() {
    return (int[])indicesArray.elementAt(RandomGenerator.intRangeRandom(indicesArray.size()));
  }

}