I know the week number of the year, a week is start from Sunday, then Monday, Tuesday...,Saturday.
Since I know the week number, what\'s the efficient way to get the
You can use the joda time library
int weekNumber = 10; DateTime weekStartDate = new DateTime().withWeekOfWeekyear(weekNumber); DateTime weekEndDate = new DateTime().withWeekOfWeekyear(weekNumber + 1);