public?class?HelloScheduler3Trigger?{
????public?static?void?main(String[]?args)?throws?SchedulerException?{
????????//?打印當(dāng)前的時(shí)間，格式為2017-01-01?00:00:00
????????Date?date?=?new?Date();
????????SimpleDateFormat?sdf?=?new?SimpleDateFormat("yyyy-MM-dd?HH:mm:ss");
????????System.out.println("Current?Time?Is?:?"?+?sdf.format(date));
????????//?創(chuàng)建一個(gè)JobDetail實(shí)例，將該實(shí)例與HelloJob?Class綁定
????????JobDetail?jobDetail?=?JobBuilder.newJob(HelloJob3Trigger.class)
????????????????.withIdentity("myJob","group1").build();

????????//獲取距離當(dāng)前時(shí)間3秒后的時(shí)間
????????date.setTime(date.getTime()+3000);
????????//獲取距離當(dāng)前時(shí)間6秒后的時(shí)間
????????Date?endDate?=?new?Date();
????????endDate.setTime(endDate.getTime()+6000);

????????//創(chuàng)建一個(gè)Trigger觸發(fā)器的實(shí)例，定義該job立即執(zhí)行，并且每2秒執(zhí)行一次，一直執(zhí)行???????上下兩個(gè)group1不是一個(gè)組
????????Trigger?trigger?=?TriggerBuilder.newTrigger()
????????????????.withIdentity("myTrigger",?"group1")
????????????????.startAt(date)
????????????????.endAt(endDate)
????????????????.withSchedule(SimpleScheduleBuilder.simpleSchedule().withIntervalInSeconds(2).repeatForever())
????????????????.build();
????????//創(chuàng)建Schedule實(shí)例
????????SchedulerFactory?sfact?=?new?StdSchedulerFactory();
????????Scheduler?scheduler?=?sfact.getScheduler();
????????scheduler.start();
????????Date?cdate?=?new?Date();
????????System.out.println("Current?Time?Iscccc?:?"?+?sdf.format(cdate));
????????scheduler.scheduleJob(jobDetail,?trigger);
????}
}

打請(qǐng)問(wèn)老師，把打印當(dāng)前時(shí)間的這幾句移到開(kāi)頭的位置就不會(huì)在控制臺(tái)輸出出了是為什么呢？