Using Swing Timer to delay task

Question

I am using Swing Timer to delay my task for a specific period of time. This time interval is decided by the user.

In my GUI, I have a SpinnerDateModel to accept the time at which the task has to be performed.

SpinnerDateModel date = new SpinnerDateModel();
        JSpinner spinner = new JSpinner(date);          
        frame.getContentPane().add(spinner);            
        Date futureDate = date.getDate();

Now, Timer has arguments Timer(int delay, ActionListener task)

ActionListener task = new ActionListener(){

                    @Override
                    public void actionPerformed(ActionEvent arg0) {

                        //send function
                    }

                };
                Timer timer = new Timer(delay, task);
                timer.setRepeats(false);                
                timer.start();

How do I set this delay to the time specified by the user?

Lawrence Dol · Accepted Answer · 2013-05-14T06:44:58.730

1

With some checking to prevent a negative delay, something like:

delay=Math.max(0,futureDate.getTime()-System.currentTimeMillis());
delay=Math.min(delay,Integer.MAX_VALUE);
// or:
//   if(delay>Integer.MAX_VALUE) { throw new exception-of-some-sort }
Timer timer=new Timer((int)delay,task);

should do the trick.

This will calculate the delay based on the number of milliseconds from now until the (presumed future) date selected by the user.

edited May 14 '13 at 06:44

answered May 14 '13 at 06:26

Lawrence Dol

63,018
25
139
189

According to this, delay has to be of `Long` type. But timer accepts only `int` – newbee May 14 '13 at 06:38
then convert the long to an int http://stackoverflow.com/questions/1590831/safely-casting-long-to-int-in-java – Sean F May 14 '13 at 06:43
1

Well, I kind of expected you to do *some* thinking of your own. Answer edited. – Lawrence Dol May 14 '13 at 06:45

Using Swing Timer to delay task

1 Answers1