SQL Server 2000 - JDBC + Java Applet problem

Question

Hai
I have some problem connecting my SQL server database with Java.
I use Applet to make my interface.
I use Windows 2000 server.
Here is my program listing :
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.*;
import java.sql.*;
public class VLookup extends JApplet {
String database = "jdbc:odbc:Driver={SQL Server};SERVER=Windows2000;uid=sa;pwd=;Database=User-Phone Database";
String user = "sa";
String password = "";
Statement s;
Connection c;
JTextField searchFor = new JTextField(10);
JLabel completion = new JLabel(" ");
JTextArea results = new JTextArea(40, 20);
public void init() {
searchFor.getDocument().addDocumentListener(new SearchL());
JPanel p = new JPanel();
p.add(new Label("ID to search for :"));
p.add(searchFor);
p.add(completion);
Container cp = getContentPane();
cp.setLayout(new BorderLayout());
cp.add(p, BorderLayout.NORTH);
cp.add(results, BorderLayout.CENTER);
try {
Class.forName( "sun.jdbc.odbc.JdbcOdbcDriver" );
c = DriverManager.getConnection(database, user, password);
s = c.createStatement();
} catch(Exception e) {
results.setText(e.getMessage());
class SearchL implements DocumentListener {
public void changedUpdate(DocumentEvent e){}
public void insertUpdate(DocumentEvent e){
textValueChanged();
public void removeUpdate(DocumentEvent e){
textValueChanged();
public void textValueChanged() {
ResultSet r;
if(searchFor.getText().length() == 0) {
completion.setText("");
results.setText("");
return;
try {
r = s.executeQuery("SELECT " + "Tipe " + "FROM " + "Time " + "WHERE " + "(Tipe Like '" + searchFor.getText() + "%') "
+ "GROUP BY " + "Tipe " + "ORDER BY " + "Tipe " );
if(r.next())
completion.setText(r.getString("Tipe"));
r = s.executeQuery("SELECT " + "ID_Pengguna, Phone_Number, Tipe " + "FROM " + "Time "
+ "WHERE " + "(Tipe ='" + completion.getText() + "') "
+ "GROUP BY " + "ID_Pengguna, Phone_Number, Tipe "
+ "ORDER BY " + "ID_Pengguna, Phone_Number " );
} catch(Exception e) {
results.setText(searchFor.getText() + "\n");
results.append(e.getMessage());
return;
results.setText("");
try {
while(r.next()) {
results.append(r.getString("ID_Pengguna") + ", " + r.getString("Phone_Number") + ", " + r.getString("Tipe") + "\n");
} catch(Exception e) {
results.setText(e.getMessage());
public static void main(String[] args) {
JApplet applet = new VLookup();
JFrame frame = new JFrame("User ID");
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e){
System.exit(0);
frame.add(applet);
frame.setSize(500, 200);
applet.init();
applet.start();
frame.setVisible(true);
} ///:~
And java catch error like this : access denied (java.lang.RuntimePermission access ClassInPackage.sun.jdbc.odbc)
What is wrong ??
Is there any problem with my DNS ? 'cos I don't know how to set up my DNS.
Can u help my with this problem ??
Thank's

Answer 1

You need to read up on what applets are capable of. Applets generally cannot open connections to things like databases due to sandboxing. There are a couple of ways to get around this. The applet can connect to a servlet on the same machine from which it came and have the servlet do the database accesses. Alternately, you can create a signed applet which allows you to get around some of these sandboxing issues.If tried to make localhost on my computer ( by setting my IIS configuration setting, and using Configure SQL XML Support in IIS I've created a new http://localhost/skripsi to my SQL database.
Is there any command that I have to add to my program listing so the applet can work as I wish ??
Is there any way to use applet to connect my database withaout using servlet, and can u explain siggned applet to mey ??
Sorry, I don't really know java very well.
driver type 4 ??