// Create a calendar object and initialize to a particular hour if desired
Calendar calendar = new GregorianCalendar();
calendar.set(Calendar.HOUR_OF_DAY, 13); // 1pm
// Create a date spinner that controls the hours
SpinnerDateModel dateModel = new SpinnerDateModel(
calendar.getTime(), null, null, Calendar.HOUR_OF_DAY);
JSpinner spinner = new JSpinner(dateModel);
// Get the date formatter
JFormattedTextField tf =
((JSpinner.DefaultEditor)spinner.getEditor()).getTextField();
DefaultFormatterFactory factory =
(DefaultFormatterFactory)tf.getFormatterFactory();
DateFormatter formatter = (DateFormatter)factory.getDefaultFormatter();
// Change the date format to only show the hours
formatter.setFormat(new SimpleDateFormat("hh:00 a"));
// Or use 24 hour mode
formatter.setFormat(new SimpleDateFormat("HH:00 a"));