// Purpose.  JComboBox demo

import javax.swing.*;
import java.awt.event.*;

public class JComboBoxDemo {
   public static JPanel createComboBox( String[] choices ) {
      JPanel comPanel = new JPanel();
      JComboBox combo = new JComboBox( choices );
      comPanel.add( combo );

      ItemListener cl = new ItemListener() {
         public void itemStateChanged( ItemEvent e ) {
            System.out.println( e.getItem() + " is "
               + ((e.getStateChange() == ItemEvent.SELECTED) ? "on" : "off") );
         }
      };
      combo.addItemListener( cl );
      return comPanel;
   }

   public static void main( String[] args ) {
      JFrame frame = new JFrame( "JComboBox demo" );
      frame.addWindowListener( new WindowAdapter() {
         public void windowClosing( WindowEvent e ) { System.exit( 0 ); } } );
      String[] choices = { "Alpha","Bravo","Charlie","Delta","Echo","Foxtrot" };
      frame.getContentPane().add( createComboBox( choices ) );
      frame.setSize( 300, 240 );
      frame.setVisible( true );
   }
}

// Echo is on
// Echo is off
// Bravo is on
// Bravo is off
// Foxtrot is on