Conditionals and Loops - Java Software Solutions: Foundations of Program Design - page 258

LISTING 5.17 continued

quote = new JLabel (comedyQuote);
quote.setFont ( new Font ("Helvetica", Font.BOLD, 24));

comedy = new JRadioButton ("Comedy", true );
comedy.setBackground (Color.green);
philosophy = new JRadioButton ("Philosophy");
philosophy.setBackground (Color.green);
carpentry = new JRadioButton ("Carpentry");
carpentry.setBackground (Color.green);

ButtonGroup group = new ButtonGroup();
group.add (comedy);
group.add (philosophy);
group.add (carpentry);

QuoteListener listener = new QuoteListener();
comedy.addActionListener (listener);
philosophy.addActionListener (listener);
carpentry.addActionListener (listener);

add (quote);
add (comedy);
add (philosophy);
add (carpentry);

setBackground (Color.green);
setPreferredSize ( new Dimension(300, 100));
}

//*****************************************************************
// Represents the listener for all radio buttons.
//*****************************************************************
private class QuoteListener implements ActionListener
{
//--------------------------------------------------------------
// Sets the text of the label depending on which radio
// button was pressed.
//--------------------------------------------------------------
public void actionPerformed (ActionEvent event)
{
Object source = event.getSource();