import java.text.SimpleDateFormat;

import java.util.Calendar;

import java.util.Date;

public class Test {

    public static void main(String[] args) {

        Calendar calendar = Calendar.getInstance();

        calendar.setFirstDayOfWeek(Calendar.MONDAY);

        calendar.add(Calendar.DATE, -);

        calendar.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);

        Date    sTime = calendar.getTime();

        calendar.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);

        Date    eTime = calendar.getTime();

        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        String s = sdf.format(sTime) + " 00:00:00";

        String e = sdf.format(eTime) + " 23:59:59";

        System.out.println(s);

        System.out.println(e);

    }

}