weightedstring.java

这是一个matlab的java实现。里面有许多内容。请大家慢慢捉摸。

/* Copyright (C) 2003 Univ. of Massachusetts Amherst, Computer Science Dept.
   This file is part of "MALLET" (MAchine Learning for LanguagE Toolkit).
   http://www.cs.umass.edu/~mccallum/mallet
   This software is provided under the terms of the Common Public License,
   version 1.0, as published by http://www.opensource.org.  For further
   information, see the file `LICENSE' included with this distribution. */

/**   Pair string and weight
 *   @author Ron Bekkerman <A HREF="mailto:[e-mail]">[e-mail]</A>
*/

package edu.umass.cs.mallet.projects.dex.types;
import java.io.*;

public class WeightedString implements Comparable, Serializable {
	public WeightedString(String str_, double weight_) {
		str = str_;
		weight = weight_;
	}
	
	public String toString() {
		return str + " (" + String.valueOf(weight) + ")";
	}
	
	public boolean equals(String str_) {
		return str.equals(str_);
	}
	
	public final int compareTo (Object b) {
		double x = weight;
		double y = ((WeightedString)b).weight;
		int toReturn = 0;
		double difference = x - y;
		if(difference > 0)
			toReturn = 1;
		else if (difference < 0)
			toReturn = -1;
		return(toReturn);		
	}
	// Fields
	String str;
	double weight;

	// Serialization
	private static final long serialVersionUID = 1;
	private static final int CURRENT_SERIAL_VERSION = 0;
	
	private void writeObject (ObjectOutputStream out) throws IOException {
		out.writeInt (CURRENT_SERIAL_VERSION);
		out.writeObject (str);
		out.writeDouble (weight);
	}

	private void readObject (ObjectInputStream in) throws IOException, ClassNotFoundException {
		int version = in.readInt();
		str = (String)in.readObject();
		weight = in.readDouble();
	}
}