// Fig. 10.20: TokenTest.java
// Testing the StringTokenizer class of the java.util package

// Java core packages
import java.util.*;
import java.awt.*;
import java.awt.event.*;

// Java extension packages
import javax.swing.*;

public class TokenTest extends JFrame {
   private JLabel promptLabel;
   private JTextField inputField;
   private JTextArea outputArea;

   // set up GUI and event handling
   public TokenTest()
   {
      super( "Testing Class StringTokenizer" );

      Container container = getContentPane();
      container.setLayout( new FlowLayout() );

      promptLabel =
         new JLabel( "Enter a sentence and press Enter" );
      container.add( promptLabel );

      inputField = new JTextField( 20 );

      inputField.addActionListener(

         // anonymous inner class
         new ActionListener() {

            // handle text field event
            public void actionPerformed( ActionEvent event )
            {      
               String stringToTokenize = 
                  event.getActionCommand();
               StringTokenizer tokens =
                  new StringTokenizer( stringToTokenize );

               outputArea.setText( "Number of elements: " +
                  tokens.countTokens() + "\nThe tokens are:\n" );

               while ( tokens.hasMoreTokens() )
                  outputArea.append( tokens.nextToken() + "\n" );
            }

         }  // end anonymous inner class

      ); // end call to addActionListener

      container.add( inputField );

      outputArea = new JTextArea( 10, 20 );
      outputArea.setEditable( false );
      container.add( new JScrollPane( outputArea ) );

      setSize( 275, 260 );  // set the window size
      show();               // show the window
   }

   // execute application
   public static void main( String args[] )
   {
      TokenTest application = new TokenTest();

      application.addWindowListener(

         // anonymous inner class
         new WindowAdapter() {

            // handle event when user closes window
            public void windowClosing( WindowEvent windowEvent )
            {
               System.exit( 0 );
            }

         }  // end anonymous inner class

      ); // end call to addWindowListener

   }  // end method main

}  // end class TokenTest

/**************************************************************************
 * (C) Copyright 2002 by Deitel & Associates, Inc. and Prentice Hall.     *
 * All Rights Reserved.                                                   *
 *                                                                        *
 * DISCLAIMER: The authors and publisher of this book have used their     *
 * best efforts in preparing the book. These efforts include the          *
 * development, research, and testing of the theories and programs        *
 * to determine their effectiveness. The authors and publisher make       *
 * no warranty of any kind, expressed or implied, with regard to these    *
 * programs or to the documentation contained in these books. The authors *
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