public DateRange(Date lower,Date upper){
  super(lower.getTime(),upper.getTime());
  this.lowerDate=lower.getTime();
  this.upperDate=upper.getTime();
}

public DateRange ( Date lower , Date upper ) { super ( lower . getTime ( ) , upper . getTime ( ) ) ; this . lowerDate = lower . getTime ( ) ; this . upperDate = upper . getTime ( ) ; }
constructs a new range .
