public static Date daysAfterWithoutTimeZone(Date dateInst,int numDays){
  if ((numDays <= 0) || (dateInst == null)) {
    throw new IllegalArgumentException();
  }
  final long daysInMillis=numDays * MILLIS_IN_DAY;
  return new Date(dateInst.getTime() + daysInMillis);
}

public static Date daysAfterWithoutTimeZone ( Date dateInst , int numDays ) { if ( ( numDays <= 0 ) || ( dateInst == null ) ) { throw new IllegalArgumentException ( ) ; } final long daysInMillis = numDays * MILLIS_IN_DAY ; return new Date ( dateInst . getTime ( ) + daysInMillis ) ; }
return the days after without impact of timezone .
