public static Date getDateOfHoursBack(final int hoursBack, final Date date) {

    return dateBack(Calendar.HOUR_OF_DAY, hoursBack, date);
  }
public static Date getDateOfHoursBack ( final int hoursBack , final Date date ) { return dateBack ( Calendar . HOUR_OF_DAY , hoursBack , date ) ; }
Get specify hours back form given date.

@param hoursBack how many hours want to be back.
@param date date to be handled.
@return a new Date object.