public class Student implements Comparable
{
    private int number;
    private String name;
    private int grade;

    public Student(int number, String name, int grade)
    {
        this.number = number;
        this.name = name;
        this.grade = grade;
    }

    public Student(int number)
    {
        this.number = number;
        this.name = "";
        this.grade = 0;
    }

    public int getNumber()
    {
        return number;
    }

    public void setNumber(int number)
    {
        this.number = number;
    }

    public String getName()
    {
        return name;
    }

    public void setName(String name)
    {
        this.name = name;
    }

    public int getGrade()
    {
        return grade;
    }

    public void setGrade(int grade)
    {
        this.grade = grade;
    }

    public String toString()
    {
        return getNumber() + " " + getName() + " " + getGrade();
    }

    public boolean equals(Object obj)
    {
        if(obj instanceof Student)
        {
            Student student = (Student)obj;
            return getNumber() == student.getNumber();
        } else
        {
            return false;
        }
    }

    public int compareTo(Object obj)
        throws ClassCastException
    {
        int i = getGrade();
        int j = ((Student)obj).getGrade();
        return i != j ? i >= j ? 1 : -1 : 0;
    }
}

import java.awt.*;
import java.applet.*;
import java.util.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;

public class StudentTester extends Applet 
                           implements ItemListener { 

  Vector studentDB;

  TextArea result;

  Choice fileURL;
  Label label1;

  String datafile[] = {	"studfile1.html",
			"studfile2.html",
			"studfile3.html",
			"studfile4.html" };

  public void init() {


    result = new TextArea(12,80);
    label1 = new Label("Test Case");
 

    fileURL = new Choice();

    for (int i = 0; i < datafile.length; i++)
	fileURL.add(datafile[i]);

    add(label1);
    add(fileURL);

    add(result);
     
    fileURL.addItemListener(this);
  }

  public void itemStateChanged(ItemEvent ie) {

    studentDB = new Vector();

    try {
    	URL url = new URL("http://personal.cityu.edu.hk/~dcywchan/2003dco10103/" +
                           fileURL.getSelectedItem());
	URLConnection data = url.openConnection();
        BufferedReader inFile = new BufferedReader(new InputStreamReader(data.getInputStream()));

        String textLine;
  
        while((textLine = inFile.readLine()) != null) {
 
          StringTokenizer  st = new  StringTokenizer(textLine, "_");

	  studentDB.add(new Student(Integer.parseInt(st.nextToken()),
                                           st.nextToken(),
					   Integer.parseInt(st.nextToken())));
         }

        Object[] tempArray = studentDB.toArray();

        Arrays.sort(tempArray);
        String s="";
             
        for (int i = 0; i <  tempArray.length; i ++) 
            s = s + ((Student) tempArray[i]).toString() + '\n';

        result.setText("");
        result.setText(s);
        inFile.close();
    } catch(MalformedURLException mue) {}
      catch(IOException ioe) {}
  }
}