Showing system time in a panel..........

Question

AOA
What may be a good appropach or logic to show system time in my application panel. And that time will properly synchronized with system time.
regards

Answer 1

Following is a code snippet.
These functions are members of a class that extends JPanel. You will need to replace calls to some functions not included here (but whose semantics should be obvious).
    private JLabel timelabel;  // this is added to the panel in the usual way
    private Timer timer;
    private ActionListener updateTheTime = new ActionListener() {
        public void actionPerformed(ActionEvent evt) {
            timeLabel.setText(timeString());
        JLabel timeLabel = new JLabel(timeString(), JLabel.RIGHT);
        add(timeLabel);
        timer = new Timer(1000, updateTheTime);
        timer.start();
    // returns a string with the current date & time
    protected String timeString() {
        // uc is created in another function
        Calendar uc = getMyCalendar(System.currentTimeMillis()));
        StringBuffer b = new StringBuffer(32);
        (new Formatter(b)).format(timeFormat, uc);
        return b.substring(0);
    }This sets up a label and adds a timer that triggers once a second that updates the text within the label.