Error connecing applet with oracle database

Question

here i m running the following code .
it executes the following query "Select * from emp";
the number in the text area decides the column number to be displayed.
import java.awt.*;
import java.applet.*;
import java.sql.*;
/*<applet code=project.class width=300 height=200>
</applet>*/
public class project extends Applet
Statement stmt=null;
Connection conn = null;
TextField t1;
public void init()
t1 = new TextField(2);
add(t1);
t1.setText("0");
public void paint(Graphics g)
int x=0,y=0,z=0;
String s1,s2,s;
try{
DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
catch(Exception e)
try{
conn = DriverManager.getConnection
("jdbc:oracle:thin:@anant:1521:student", "scott", "tiger");
stmt = conn.createStatement();
catch(Exception e)
s1 = t1.getText();
x = Integer.parseInt(s1);
try{
ResultSet rset = stmt.executeQuery("select * from emp");
while (rset.next())
s2 = (rset.getString(x));
g.drawString(s2,100,100);
stmt.close();
catch(Exception e){}
public boolean action(Event event,Object obj)
repaint();
return true;
i m getting following error.
Exception in thread "AWT-EventQueue-1" java.lang.NoClassDefFoundError: oracle/jdbc/OracleDriver
at project.paint(project.java:23)
at java.awt.Container.update(Container.java:1730)
at sun.awt.RepaintArea.updateComponent(RepaintArea.java:239)
at sun.awt.RepaintArea.paint(RepaintArea.java:216)
at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:254)
at java.awt.Component.dispatchEventImpl(Component.java:4031)
at java.awt.Container.dispatchEventImpl(Container.java:2024)
at java.awt.Component.dispatchEvent(Component.java:3803)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:234)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
this error comes when i run every jdbc applet.
can anyone suggest any solution.

Answer 1

seems as if your client machines are missing the oracle driver. This is one of the disadvantages of a single tier environment you have to make sure that the oracle driver is available to the machines where the applet is run.
If you have the possibility to define/change the configuration or setup of these machines, e.g. in an intranet environment) deploy the driver in the ext directory of the virtual machines used. If not you can make it a part of your applet jar file, so it is downloaded with the applet code and therefore available to the virtual machines.