the below code display the bill date fields empty when testing the code.can someone assist in identifying the error?

String custId = request.getParameter("customerId"); 
String emailId = request.getParameter("emailId"); 
String phoneNumber = request.getParameter("phoneNumber"); 
String[] dateStr = new String[3];
 String[] status = new String[3];
 try { //Code to connect to the database 
 String sql = "select bill_id, customer_id, bill_date, status from customer_bills where customer_id=? and status='Paid'";
 PreparedStatement stmt = conn.prepareStatement(sql); 
 stmt.setString(1, custId);
 ResultSet rs = stmt.executeQuery();

}
conn.close();
} catch (SQLException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
//Code to display the details
}