Java Date operation

Source: Internet
Author: User

I. Acquisition of the 2015-09-18 00:00:00.0

Calendar currentcalendar=calendar.getinstance ();D ate currentdatetime=currentcalendar.gettime (); Calendar cl=calendar.getinstance (); Cl.set (Currentcalendar.get (calendar.year), Currentcalendar.get (Calendar.MONTH ), Currentcalendar.get (, 0, 0, 0); SimpleDateFormat sdf=new SimpleDateFormat ("Yyyy-mm-dd HH:mm:ss. S "); SimpleDateFormat sdf2=new SimpleDateFormat ("Yyyy-mm-dd"); String Str=sdf.format (Cl.gettime ()); System.out.println (Sdf.format (Sdf2.parse (str)));

Second, how many days to get 2 time difference

Date currentdatetime=calendar.getinstance (). GetTime ();D ate datacreatedate=calendar.getinstance (). GetTime (); long diff = datacreatedate.gettime ()-currentdatetime.gettime (); Long days = diff/(1000 * 60 * 60 * 24);

Java Date operation

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