Calculating time until a next monday

Question

Hi,
I am trying to get a good calculation to set the initial delay of a timer. I am implementing a scheduler which will fire every monday at 16:00. If my applications starts I need to calculate how many milliseconds are left from now until the next monday 16:00 for the first trigger.
I tried several simple calculations but i can't get it right.
Does anyone know a simple trick or method which does this for me?

Answer 1

Hi,
you can try it with:
//define a start day
java.util.Date today = new java.util.Date();
Calendar cal = Calendar.getInstance();
//set next monday
cal.setTime(today);
cal.add(Calendar.WEEK_OF_MONTH, 1);
cal.set(Calendar.DAY_OF_WEEK, 1);
cal.set(Calendar.HOUR, 16);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.MILLISECOND, 0);
//calculate miliseconds from start date
long milisecLeft = cal.getTime().getTime()-today.getTime();Hope it helps
regards