Error in displaying database content in choice

Question

Sir,
The program is meant to show the contents of the the fields of the database file in choice control. But the data is not seen in the choice control
//The program displays the data stored in the database file students.mdb. The //file contains the fields 'Name' and 'Grade'.
import java.net.*;
import java.sql.*;
import java.awt.*;
import java.awt.event.*;
public class jdbc extends Frame
Choice students;
Choice grades;
Connection connection;
Statement statement;
public jdbc()
students = new Choice();
grades = new Choice();
setLayout(new FlowLayout());
try
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
connection = DriverManager.getConnection(
"jdbc:odbc:students", "Steve", "password");
statement = connection.createStatement();
String SQL = "SELECT Name FROM Students";
ResultSet resultset = statement.executeQuery(SQL);
while (resultset.next())
students.addItem(resultset.getString(1));
SQL = "SELECT Grade FROM Students";
resultset = statement.executeQuery(SQL);
while (resultset.next())
grades.addItem(resultset.getString(1));
catch(Exception e) {}
add(students);
add(grades);
public static void main (String args[])
Frame f = new jdbc();
f.setSize(300, 300);
f.addWindowListener(new WindowAdapter() {public void
           windowClosing(WindowEvent e) {System.exit(0);}});
f.show();
}

Answer 1

I made the content of the field to be displayed in the choice control. But the field contents are not visible in the control, eventhough the choice controls are displayed in the window. This program was taken from the text Java 2 Programming (Black Book) by Steven Holzner.