// Fig. 10.24: Key.java
// Demonstrating keystroke events.
import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;

public class Key extends Applet implements KeyListener {
   private String line1 = "";
   private String line2 = "";
   private String line3 = "";

   public void init()
   {
      // allow applet to process Key events
      addKeyListener( this );

      // make applet the active component for key events
      requestFocus();
   }

   public void paint( Graphics g )
   {
      g.drawString( line1, 25, 25 );
      g.drawString( line2, 25, 40 );
      g.drawString( line3, 25, 55 );
   }

   public void keyPressed( KeyEvent e )
   {
      line1 = "Key pressed: " +
               e.getKeyText( e.getKeyCode() );
      setLines2and3( e );
   }

   public void keyReleased( KeyEvent e )
   {
      line1 = "Key released: " +
               e.getKeyText( e.getKeyCode() );
      setLines2and3( e );
   }

   public void keyTyped( KeyEvent e )
   {
      line1 = "Key typed: " + e.getKeyChar();
      setLines2and3( e );
   }

   private void setLines2and3( KeyEvent e )
   {
      line2 = "This key is " +
              ( e.isActionKey() ? "" : "not " ) +
              "an action key";

      String temp = 
         e.getKeyModifiersText( e.getModifiers() );

      line3 = "Modifier keys pressed: " +
              ( temp.equals( "" ) ? "none" : temp );
      repaint();
   }
}