JAVA asks the current date next day, next week, next one months, the forward solution also resembles __java

Java in a lot of time format, in the solution, more convenient to call

1, the next day to solve

public static string Getnextday (string now) {
		Date nowdate;
		String Nday=new string ();
		SimpleDateFormat sdf=new SimpleDateFormat ("YyyyMMdd");

		try{
			Nowdate=sdf.parse (now);
			Long oneday=1000*3600*24;
			Date Nextday=new Date (Nowdate.gettime () +oneday);
			Nday = Sdf.format (Nextday.gettime ());

		} catch (Exception e) {

			e.printstacktrace ();
		}
		return nday;
	}

The main use is the date type in Java to get the number of milliseconds

2. Solve a week

public static string Getnextweek (string now) {
		Date nowdate;
		String Nweek=new string ();
		SimpleDateFormat sdf=new SimpleDateFormat ("YyyyMMdd");

		try{
			Nowdate=sdf.parse (now);
			
			Long oneday=1000*3600*24;
			Date Nextweek=new Date (Nowdate.gettime () +oneday* (9-nowdate.getday ()));
			Nweek = Sdf.format (Nextweek.gettime ());

		} catch (Exception e) {

			e.printstacktrace ();
		}
		return nweek;
	}

3, solve the next one months

public static string Getnextmonth (string now) {
		Date t;
		String Nmonth=new string ();
		SimpleDateFormat sdf=new SimpleDateFormat ("Yyyymm");

		try{
			T=sdf.parse (now);
			Date Nextmonth=new Date ((T.getyear () + (T.getmonth () +1)/12), (T.getmonth () +1)%12,t.getdate ());
			Nmonth = Sdf.format (Nextmonth.gettime ());

		} catch (Exception e) {

			e.printstacktrace ();
		}
		return nmonth;
	}

4. Solve the next

public static string Getnexthour (string now) {
		Date nowdate;
		String Nhour=new string ();
		SimpleDateFormat sdf=new SimpleDateFormat ("YyyyMMdd HH");

		try{
			Nowdate=sdf.parse (now);
			Long onehour=1000*3600;
			Date Nextday=new Date (Nowdate.gettime () +onehour);
			Nhour= Sdf.format (Nextday.gettime ());

		} catch (Exception e) {

			e.printstacktrace ();
		}
		return nhour;
	}