Scheduler sched = StdSchedulerFactory.getDefaultScheduler(); if (!sched.isStarted()){ sched.start(); } String konf = MyConfigClass.getRow(25).getKonfiguration(); Calendar cal = Calendar.getInstance(); cal.setTime(MyParser.stf.parse(konf)); String expression = "0 " + cal.get(Calendar.MINUTE) + " " + cal.get(Calendar.HOUR_OF_DAY) + " ? * MON-FRI"; CronTrigger ct = new CronTrigger(triggerName, group, jobName, group, expression); if (sched.getTrigger(triggerName, Scheduler.DEFAULT_GROUP) != null) { sched.rescheduleJob(triggerName, group, ct); } else { JobDetail jd