Java determines that the current time is within a certain period of time

public class test4 {
	 public static void main(String[] args) {
		 SimpleDateFormat df = new SimpleDateFormat("HH:mm");// Set date format
		 Date now = null;
		 Date beginTime = null;
		 Date endTime = null;
		 try {
			 now = ((new Date()));
			 beginTime = ("06:00");
			 endTime = ("22:00");
		 } catch (Exception e) {
			 ();
		 }
		 Boolean flag = belongCalendar(now, beginTime, endTime);
		 (flag);
	 }

	 /**
	  * Determine whether the time is within the time period
	  *
	  * @param nowTime
	  * @param beginTime
	  * @param endTime
	  * @return
	  */
	 public static boolean belongCalendar(Date nowTime, Date beginTime,
			 Date endTime) {
		 Calendar date = ();
		 (nowTime);

		 Calendar begin = ();
		 (beginTime);

		 Calendar end = ();
		 (endTime);

		 if ((begin) && (end)) {
			 return true;
		 } else {
			 return false;
		 }
	 }
 }