（一）当前的时间推后三个小时

| LocalTime time = LocalTime.now();
System.out.println(“time = “ + time);//time = 16:44:20.800 (小时:分:秒:毫秒)
LocalTime newTime = time.plusHours(3);
System.out.println(“三个小时后的时间为:”+newTime); //三个小时后的时间为:19:44:20.800 | | —- |