// Fig. 23.2: StackTest.java
// Testing the Stack class of the java.util package
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class StackTest extends JFrame {

   public StackTest()
   {
      super( "Stacks" );

      Container c = getContentPane();

      final JLabel status = new JLabel();
      final Stack s = new Stack();

      c.setLayout( new FlowLayout() );
      c.add( new JLabel( "Enter a string" ) );
      final JTextField input = new JTextField( 10 );
      c.add( input );      

      JButton pushBtn = new JButton( "Push" );
      pushBtn.addActionListener(
         new ActionListener() {
            public void actionPerformed( ActionEvent e )
            {
               status.setText( "Pushed: " + 
                  s.push( input.getText() ) );
            }
         }
      );
      c.add( pushBtn );    

      JButton popBtn = new JButton( "Pop" );
      popBtn.addActionListener(
         new ActionListener() {
            public void actionPerformed( ActionEvent e )
            {
               try {
                  status.setText( "Popped: " + s.pop() );
               }
               catch ( EmptyStackException exception ) {
                  status.setText( exception.toString() );
               }
            }
         }
      );
      c.add( popBtn );     

      JButton peekBtn = new JButton( "Peek" );
      peekBtn.addActionListener(
         new ActionListener() {
            public void actionPerformed( ActionEvent e )
            {
               try {
                  status.setText( "Top: " + s.peek() );
               }
               catch ( EmptyStackException exception ) {
                  status.setText( exception.toString() );
               }
            }
         }
      );
      c.add( peekBtn );     

      JButton emptyBtn = new JButton( "Is Empty?" );
      emptyBtn.addActionListener(
         new ActionListener() {
            public void actionPerformed( ActionEvent e )
            {
               status.setText( s.empty() ? 
                  "Stack is empty" : "Stack is not empty" );                              
            }
         }
      );
      c.add( emptyBtn );   

      JButton searchBtn = new JButton( "Search" );
      searchBtn.addActionListener(
         new ActionListener() {
            public void actionPerformed( ActionEvent e )
            {
               String searchKey = input.getText();
               int result = s.search( searchKey );

               if ( result == -1 ) 
                  status.setText( searchKey + " not found" );
               else
                  status.setText( searchKey + 
                     " found at element " + result );                     
            }
         }
      );
      c.add( searchBtn );  

      JButton displayBtn = new JButton( "Display" );
      displayBtn.addActionListener(
         new ActionListener() {
            public void actionPerformed( ActionEvent e )
            {
               Enumeration enum = s.elements();
               StringBuffer buf = new StringBuffer();
        
               while ( enum.hasMoreElements() )
                  buf.append(
                     enum.nextElement() ).append( " " );
       
               JOptionPane.showMessageDialog( null,
                   buf.toString(), "Display",
                   JOptionPane.PLAIN_MESSAGE );
            }
         }
      );
      c.add( displayBtn );
      c.add( status );

      setSize( 675, 100 );
      show();
   }

   public static void main( String args[] )
   {
      StackTest app = new StackTest();

      app.addWindowListener(
         new WindowAdapter() {
            public void windowClosing( WindowEvent e )
            {
               System.exit( 0 );
            }
         }
      );
   }
}

/**************************************************************************
 * (C) Copyright 1999 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 *
 * and publisher shall not be liable in any event for incidental or       *
 * consequential damages in connection with, or arising out of, the       *
 * furnishing, performance, or use of these programs.                     *
 *************************************************************************/