DateTime.java

import java.util.Calendar;
/*
 *	Class for getting array of future dates and showtimes.
 */
class DateTime {
	/*
	 *	Method: getDates
	 *	Parameters: int noOfDays - the length of array to be returned
	 *	Return type: String[]
	 *	Description: This method returns an string array of future dates 
	 */
	static String[] getDates(int noOfDays) {
		String[] dates = new String[noOfDays];
		Calendar c = Calendar.getInstance();
		for(int i = 0 ; i < noOfDays; i++) {
			String date = c.getTime().toString();
			date = date.substring(0, 10) + " " + date.substring(date.length() - 4);
			dates[i] = date;
			c.add(Calendar.DATE,1);
		}
		return dates;
	}
	/*
	 *	Method: getTimes
	 *	Parameters: String date - the date for whom the showtimes are to be shown
	 *	Return type: String[]
	 *	Desc:	This method returns an string array of showtimes (   default: {"07:00","10:15","13:30","16:45","20:00","23:00"}   )
	 *	 if the parameter is the current date, then it removes any showtime, whose time has already passed in the current date,
	 *	from the array to be returned
	 */
	static String[] getTimes(String date) {
		String[] times = new String[]{"07:00","10:15","13:30","16:45","20:00","23:00"};
		if(date == null) return times; // If no date is specified, return default timings
		Calendar c = Calendar.getInstance();// else check if specified date is current date
		String current = c.getTime().toString();
		current = current.substring(0, 10) + " " + current.substring(current.length() - 4);
		if(date.equals(current)){   // If specified date is current date, then check if any showtime has already passed
			Calendar showtime = Calendar.getInstance();
			for(int i = times.length-1; i >=0;i--){	// iterating from end to start to remove the first mismatch it finds, and all the previous ones
				showtime.set(Calendar.HOUR_OF_DAY,Integer.parseInt(times[i].substring(0,2)));
				showtime.set(Calendar.MINUTE,Integer.parseInt(times[i].substring(3)));
				if(showtime.before(c)){  // If the showtime has already passed, remove that and all preceding show times
					String[] tmp = new String[times.length - i - 1];
					System.arraycopy(times,i+1,tmp,0,tmp.length);
					times = tmp;
					break;
				}
			}
		}
		return times;
	}
}