String date1Query = "SELECT checkIn FROM Reservation WHERE roomLocation LIKE '" + room + "'";
String date2Query = "SELECT checkOut FROM Reservation WHERE roomLocation LIKE '" + room + "'";

ResultSet date1RS = statement.executeQuery(date1Query);
ResultSet date2RS = statement.executeQuery(date2Query);
    while (date1RS.next()) {
        date1 = date1RS.getDate("checkIn");
        date2 = date2RS.getDate("checkOut");
        dateCheckBool = dateCheck.dateCheck(date1, date2, checkIn, checkOut);

        if (dateCheckBool == true)
            break;
    }