Basic Text Components - The Definitive Guide to Java Swing - page 559

Listing 15-14. JFormattedTextField Example
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.text.*;
public class FormattedSample {
public static void main(final String args[]) {
Runnable runner = new Runnable() {
public void run() {
JFrame frame = new JFrame("Formatted Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel datePanel = new JPanel(new BorderLayout());
JLabel dateLabel = new JLabel("Date: ");
dateLabel.setDisplayedMnemonic(KeyEvent.VK_D);
DateFormat format = new SimpleDateFormat("yyyy--MMMM--dd");
JFormattedTextField dateTextField = new JFormattedTextField(format);
dateLabel.setLabelFor(dateTextField);
datePanel.add(dateLabel, BorderLayout.WEST);
datePanel.add(dateTextField, BorderLayout.CENTER);
frame.add(datePanel, BorderLayout.NORTH);
JPanel date2Panel = new JPanel(new BorderLayout());
JLabel date2Label = new JLabel("Date 2: ");
date2Label.setDisplayedMnemonic(KeyEvent.VK_A);
DateFormat displayFormat = new SimpleDateFormat("yyyy--MMMM--dd");
DateFormatter displayFormatter = new DateFormatter(displayFormat);
DateFormat editFormat = new SimpleDateFormat("MM/dd/yy");
DateFormatter editFormatter = new DateFormatter(editFormat);
DefaultFormatterFactory factory = new DefaultFormatterFactory(
displayFormatter, displayFormatter, editFormatter);
JFormattedTextField date2TextField = new JFormattedTextField(factory,
new Date());
date2Label.setLabelFor(date2TextField);
date2Panel.add(date2Label, BorderLayout.WEST);
date2Panel.add(date2TextField, BorderLayout.CENTER);
frame.add(date2Panel, BorderLayout.SOUTH);
ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
JFormattedTextField source =
(JFormattedTextField)actionEvent.getSource();
Object value = source.getValue();