How to update Java timer every second?

Allen Scott 2900 04 Nov 2014

I want to grab the current date and time from the system which i can do with this code:

private void GetCurrentDateTimeActionPerformed(java.awt.event.ActionEvent evt)
{                                                   
     DateFormat dateandtime = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss");
     Date date = new Date();
     CurrentDateTime.setText(dateandtime.format(date));
}

Doing this is fine as it will grab he current date nad time no problem, however it is not dynamic as the time will not update unless the button is pressed again. So I was wondering how I could make this button more dynamic by updating the function every second to refresh the time.

Ask by Allen Scott

Updated 04 Nov 2014

1 Answers

Anonymous User 04 Nov 2014

You can use an executor to update that periodically. Something like this:

ScheduledExecutorService e= Executors.newSingleThreadScheduledExecutor();
e.scheduleAtFixedRate(new Runnable() {
  @Override
  public void run() {
    SwingUtilities.invokeLater(new Runnable() {
       DateFormat dateandtime = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss");
       Date date = new Date();
       CurrentDateTime.setText(dateandtime.format(date));
    });
  }
}, 0, 1, TimeUnit.SECONDS);

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How to update Java timer every second?

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