final Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(cal.getTimeInMillis() //
// Saturday is the 7th day of week, so use modulo to get it : remove day between todoay
- (( cal.get(Calendar.DAY_OF_WEEK) % 7) * 86400000)); // 86400000=24*60*60*1000
System.out.println(cal.getTime());
. . .