AWT(Demonstrating Keystroke Events)

// Demonstrating keystroke events.
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class KeyDemo extends JFrame implements KeyListener
{
private String line1 = "", line2 = "";
private String line3 = "";
private JTextArea textArea;

public KeyDemo()
{
super( "Demonstrating Keystroke Events" );

textArea = new JTextArea( 10, 15 );
textArea.setText( "Press any key on the keyboard..." );
textArea.setEnabled( false );

// allow frame to process Key events
addKeyListener( this );

getContentPane().add( textArea );

setSize( 350, 100 );
show();
}

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 );

textArea.setText( line1 + "\n" + line2 + "\n" + line3 + "\n" );
}

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

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