JSpinner giving old values

Question

I am using couple of JSpinners in my project who display the hour and minutes. When the JSpinner is incremented or decremented i have to save the value to the database. But

Answer 1

You could maintain a "master date" which you re-merge the time value back into on each stateChanged event.

public class Main {

    public static void main(String[] args) {
        new Main();
    }

    public Main() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                }

                JFrame frame = new JFrame("Test");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setLayout(new BorderLayout());
                frame.add(new TestPane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }

        });
    }

    public class TestPane extends JPanel {

        public TestPane() {
            setLayout(new GridBagLayout());
            add(new DateSpinner(new Date()));
        }

    }

    public class DateSpinner extends JSpinner {

        private Date masterDate;

        public DateSpinner(Date date) {
            super(new SpinnerDateModel());
            this.masterDate = date;
            SpinnerDateModel model = (SpinnerDateModel) getModel();
            model.setCalendarField(Calendar.HOUR);
            setEditor(new JSpinner.DateEditor(this, "hh:mm"));
            JFormattedTextField tf = ((JSpinner.DefaultEditor) getEditor()).getTextField();
            DefaultFormatterFactory factory = (DefaultFormatterFactory) tf.getFormatterFactory();
            DateFormatter formatter = (DateFormatter) factory.getDefaultFormatter();

            formatter.setFormat(new SimpleDateFormat("hh:mm"));

            setValue(date);

            addChangeListener(new ChangeListener() {
                @Override
                public void stateChanged(ChangeEvent e) {

                    Calendar cal = Calendar.getInstance();
                    cal.setTime(masterDate);

                    Calendar time = Calendar.getInstance();
                    time.setTime((Date) getValue());

                    cal.set(Calendar.HOUR_OF_DAY, time.get(Calendar.HOUR_OF_DAY));
                    cal.set(Calendar.MINUTE, time.get(Calendar.MINUTE));

                    masterDate = cal.getTime();

                    System.out.println(masterDate);

                }

            });
        }

        public String getTime() {
            return new SimpleDateFormat("hh:mm").format((Date)getValue());
        }

    }

}