• TestCase 1
• TestCase 2
• TestCase 3
• TestCase 4

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

public class DictionaryTester extends Applet 
                           implements ItemListener { 

  Dictionary dictionary;
  DictionaryVector dictionaryVector;

  TextArea result;

  Checkbox arrayBox;
  Checkbox vectorBox;
  CheckboxGroup ops;
  Panel opsPad;

  Choice fileURL;
  Label label;

  String datafile[] = {	"datafile1.html",
			"datafile2.html",
			"datafile3.html",
			"datafile4.html" };


  public void init() {

    opsPad = new Panel();
    opsPad.setLayout(new GridLayout(2,1));

    ops = new CheckboxGroup();

    arrayBox = new Checkbox("Array", ops, true);
    vectorBox = new Checkbox("Vector", ops, false);
	
    opsPad.add(arrayBox);
    opsPad.add(vectorBox);

    result = new TextArea(15,80);
    label = new Label("Test Case");
    fileURL = new Choice();

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

    // add choice lists to window
    add(opsPad);
    add(label);
    add(fileURL);
    add(result);
     
    // register to receive item events
    fileURL.addItemListener(this);
  }

  public void itemStateChanged(ItemEvent ie) {

    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()));

        if (arrayBox.getState())  {
               dictionary = new Dictionary();
            } else {
               dictionaryVector = new DictionaryVector();
              }

        String textLine;
  
        //process every line in the file
        while((textLine = inFile.readLine()) != null) {

          //use StringTokenizer to break line into words
          StringTokenizer  st = new  StringTokenizer(textLine, "_");

          while (st.hasMoreTokens()) {
            //add every word
            if (arrayBox.getState())  {
               dictionary.addWord(st.nextToken());
            } else {
               dictionaryVector.addWord(st.nextToken());
              }
          }
        }
        
        if (arrayBox.getState())  {
            result.setText("");
            result.setText("Dictionary using Array: " + '\n' + dictionary.toString());
        } else {
               result.setText("");
               result.setText("Dictionary using Vector " + '\n' + dictionaryVector.toString());
          }

        inFile.close();
    } catch(MalformedURLException mue) {}
      catch(IOException ioe) {}
   }
}