How to write,compile and run Thread

Question

i want to write a thread which runs at 12 o'clock night and then execute daily at 12 o'clock and execute some SQL query. plz send me the code which use extend method. and waht is the code to start it auttomatically at a perticular time

Answer 1

As an altnative, use the Calendar Object to calculate the next time you want to run, then sleep for that figure less the current time.
Something like:
public void run() {
  Calendar cal = Calendar.getInstance();
  Date now = Calendar.getTime();
  cal.set(Calendar.HOUR, 12);
  cal.set(Calendar.MINUTE, 0);
  cal.set(Calendar.SECOND, 0);
  if(!cal.getTime().after(now))  // is it already after 12?
    cal.add(Calendar.DAY_OF_YEAR, 1);
  for(;;) {
    sleep(cal.getTime().getTime() - now.getTime());
    ... do your stuff
    cal.add(Calendar.DAY_OF_YEAR, 1);
    now = new Date();