Java calculates the Monday and Sunday of the week based on the specified date

Public static void main (String[] args)  throws ParseException {                     Simpledateformat sdf=new simpledateformat ("Yyyy-mm-dd");  //set time format             calendar cal = calendar.getinstance ();            date time=sdf.parse ("2015-9-4 14:22:47");          cal.settime (Time);            system.out.println ("To calculate Date:" +sdf.format (Cal.gettime ()))  //output to calculate date                      // Determine whether the date to be calculated is Sunday, if it is minus one day to calculate the Saturday, otherwise there will be a problem, calculated to the next week             Int dayweek = cal.gET (Calendar.day_of_week);//Get the current date is the first day of the one weeks            if (1 == dayweek)  {               cal.add (calendar.day_of_month, -1);            }                    cal.setfirstdayofweek (calendar.monday);//Set one the first day of the week, according to the Chinese habit one weeks the first day is Monday                    int day =  Cal.get (Calendar.day_of_week);//Get the current date is the day of the one week            Cal.add (Calendar.date, cal.getfirstdayofweek ()-day);//According to the rules of the calendar, subtract the difference between the day of the week and the first of the one weeks of the current date             system.out.println ("Date of week Monday:" +sdf.format (Cal.getTime ()));      &Nbsp;  system.out.println (Cal.getfirstdayofweek () + "-" +day+ "+6=" + (Cal.getfirstdayofweek ()-day+6));                 cal.add ( CALENDAR.DATE, 6);         system.out.println ("Date of week Sunday:" + Sdf.format (Cal.gettime ()));                }

Java calculates the Monday and Sunday of the week based on the specified date