java 时间运算

/**时间运算test，针对通话时间只有开始时间和通话时长，计算出通话结束时间*/
	public static void main(String[] args) {
		try {
			DateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//设置日期格式
			long duration = (long) 60.8148399591446 * 1000;
			Date time =  (Date)(format.parse("2018-04-10 14:13:31"));
			System.err.println(time.getTime());
			Date endtime = new Date(time.getTime() + duration);
			System.err.println(endtime.getTime());
			//System.err.println(sdf.format(endtime.toString()));
			 Date currentTime = new Date();
			SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
			String dateString = formatter.format(endtime);
			System.err.println(dateString);
		} catch (Exception e) {
			System.err.println(e);
		}
		
	}