Keyboard and Mouse Listener

import java.applet.*;
import java.awt.*;
import java.awt.event.*;

public class Keyboard1 extends Applet
implements KeyListener, MouseListener
{

int width, height;
int x, y;
String s = "";

public void init()
{

width = getSize().width;
height = getSize().height;
setBackground( Color.black );

x = width/2;
y = height/2;

addKeyListener( this );
addMouseListener( this );

}

public void keyPressed( KeyEvent e ) { }
public void keyReleased( KeyEvent e ) { }
public void keyTyped( KeyEvent e )
{

char c = e.getKeyChar();
if ( c != KeyEvent.CHAR_UNDEFINED )
{

s = s + c;
repaint();
e.consume();

}

}

public void mouseEntered( MouseEvent e ) { }
public void mouseExited( MouseEvent e ) { }
public void mousePressed( MouseEvent e ) { }
public void mouseReleased( MouseEvent e ) { }
public void mouseClicked( MouseEvent e )
{

x = e.getX();
y = e.getY();
s = "";
repaint();
e.consume();

}

public void paint( Graphics g )
{

g.setColor( Color.gray );
g.drawLine( x, y, x, y-10 );
g.drawLine( x, y, x+10, y );
g.setColor( Color.green );
g.drawString( s, x, y );

}

}