Advanced Text Capabilities - The Definitive Guide to Java Swing - page 607

public class NumberInputSample {
public static void main(String args[]) {
Runnable runner = new Runnable() {
public void run() {
JFrame frame = new JFrame("Number Input");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Font font = new Font("SansSerif", Font.BOLD, 16);
JLabel label;
JFormattedTextField input;
JPanel panel;
BoxLayout layout =
new BoxLayout(frame.getContentPane(), BoxLayout.Y_AXIS);
frame.setLayout(layout);
Format currency =
NumberFormat.getCurrencyInstance(Locale.UK);
label = new JLabel("UK Currency:");
input = new JFormattedTextField(currency);
input.setValue(2424.50);
input.setColumns(20);
input.setFont(font);
panel = new JPanel(new FlowLayout(FlowLayout.RIGHT));
panel.add(label);
panel.add(input);
frame.add(panel);
Format general = NumberFormat.getInstance();
label = new JLabel("General/Instance:");
input = new JFormattedTextField(general);
input.setValue(2424.50);
input.setColumns(20);
input.setFont(font);
panel = new JPanel(new FlowLayout(FlowLayout.RIGHT));
panel.add(label);
panel.add(input);
frame.add(panel);
Format integer = NumberFormat.getIntegerInstance(Locale.ITALIAN);
label = new JLabel("Italian integer:");
input = new JFormattedTextField(integer);
input.setValue(2424.50);
input.setColumns(20);
input.setFont(font);