ADVANCED GUIS AND GRAPHICS - Java Programming: From Problem Analysis to Program Design - page 849

object. The complete program listing follows. (Notice that the program uses a message
dialog box to inform the user what to do.)
//Key Event

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

public class OneChar extends JApplet
{

JTextField oneLetter = new JTextField(1);

public void init()
{

Container c = getContentPane();

//register the listener object
oneLetter.addKeyListener( new KeyAdapter()
{

public void keyTyped(KeyEvent e)
{

float red, green, blue;

Color fg, bg;

oneLetter.setText(" ");

red = ( float ) Math.random();
green = ( float ) Math.random();
blue = ( float ) Math.random();

fg = new Color(red, green, blue);
bg = Color.white;

oneLetter.setForeground(fg);
oneLetter.setBackground(bg);
oneLetter.setCaretColor(bg);
oneLetter.setFont( new Font("Courier",
Font.BOLD, 200)); 1

2

}

});

c.setLayout( new GridLayout(1, 1));
c.setBackground(Color.white);
c.add(oneLetter);

JOptionPane.showMessageDialog
( null , "Click on the applet, then type a key ",
"Information", JOptionPane.PLAIN_MESSAGE );

}

}