// Fig. 11.18: TokenTest.java
// StringTokenizer class.
import java.util.*;
import java.awt.*;
import java.awt.event.*;
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(

         new ActionListener() {  // anonymous inner class

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

               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, 240 );  // set the window size
      setVisible( true );   // show the window
   }

   // execute application
   public static void main( String args[] )
   {
      TokenTest application = new TokenTest();
      application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
   } 

} // end class TokenTest

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