globalstring.java

用java实现的改进粒子群算法

/**
 * Description: operations for the a text string.
 *
 * @ Author        Create/Modi     Note
 * Xiaofeng Xie    Feb 22, 2001
 * Xiaofeng Xie    May 12, 2004
 *
 * 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;

import java.io.*;
import java.util.*;

public class GlobalString {
  public static final String EQUAL_TAG = "=";

/**
  * Tokenize a String with given key.
  * @param      input      the String to be tokenized.
  * @param      tokenKey   the delimiters.
  * @return  a String array that include the elements of input string that
  * divided by the tokenKey.
  */
  public static String[] tokenize(String input , String tokenKey) {
    Vector v = new Vector();
    StringTokenizer t = new StringTokenizer(input, tokenKey);
    String cmd[];
    while (t.hasMoreTokens())
      v.addElement(t.nextToken());
    cmd = new String[v.size()];
    for (int i = 0; i < cmd.length; i++)
      cmd[i] = (String) v.elementAt(i);
    return cmd;
  }

  static public int toInteger(Object oVal) throws Exception {
    if(oVal==null) throw new Exception("Null string");
    return new Integer(oVal.toString()).intValue();
  }

  static public double toDouble(Object oVal) throws Exception {
    if(oVal==null) throw new Exception("Null string");
    return new Double(oVal.toString()).doubleValue();
  }

  public static Object toObject(String key) throws Exception{
    Class cls = Class.forName(key);
    return cls.newInstance();
  }
}