Applet to Oracle

Hello,
I have written an aplet to connect to oracle. Now, i have the oracle loaded on to my PC and the applet is also there on the same PC. I am using Oracle thin driver to connect. It works fine with application as i give the classpath while executing the java programs. But here when i load the HTML for the applet, i get error
Can't find the driver specified : OracleDriver
here is the code i am using:
String url = "oracle.jdbc.driver.OracleDriver";
String connect_string = "jdbc:oracle:thin:@homepc:1521:ORA815";
I am using ForName(url) and DriverManager.getConnection(connect_string..)
I guess it is not recognizing the path where this orcledriver class is located. I don't have any knowledge as to how to specify this classpath in applet tag in HTML file if atall it is possible. Somebody please help in telling me what should be done to connect to Oracle from an Applet.
Once more i am telling the applet and Oracle both are on the same PC. Only in different directories. Hope this is ok.
I will appreciate any kind of help.
Thanks a lot for the helper in advance.

Are you using a Webserver to deploy the applet ?.
Are you using the appletviewer ?.
By default all classfiles required by the Applet would be searched relative to the codebase from which the applet was downloaded.
You could include Java Archive files using
the ARCHIVE tag of the applet to download jar files containing the classes required by the applet.
<APPLET CODE="mypackage.MyApplet.class"
CODEBASE="/test/"
ARCHIVE = "MyApplet.jar,
jdev-rt.zip,
classes111.zip" ...>
In your case, its not able to find the Driver, since th driver classes are present in the JDBC zip file classes111.zip. You need
to include it in the ARCHIVE.
If you are excuting the applet without the webserver, then
In the above, "/test/" is a virtual directory
mapped in the webserver pointing to a physical directory. It is in this directory
on the webserver system that the class file
pointed by the CODE & the JAR files pointed
by ARCHIVE.
If you are executing the applet without the
webserver, then have the classes111.zip &
the applet class in the directory where the html file is and have the applet tag as follows
<APPLET CODE="applet.class"
CODEBASE="."
ARCHIVE = "classes111.zip">
You could find the classes111.zip under
$ORACLE_HOME\jdbc\lib
Hope this helps.
null

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hi all,
here i m running the following code .
it executes the following query "Select * from emp";
the number in the text filed 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.

Mintu,
You said:
i do have to access to jdbc driversNo, you don't. Otherwise you wouldn't be getting that error message.
Good Luck,
Avi.

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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.
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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)
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My dear colleague, You better consider asking this question in Jdeveloper forum.
I have a simple code for Windows application. You can easily convert it into Applet application..
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import java.awt.event.*;
import java.sql.*;
import oracle.jdbc.*;
import oracle.sql.*;
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TextField inputText;
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Make sure you have appropriate libraries in classpath...

Need help re applet and oracle thin

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[1] Problem connecting using Oracle JDBC drivers

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Applet to oracle server

I m trying to connect to oracle through an applet
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I have replaced machine name with ip, no effect
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Renjith

I m trying to connect to oracle through an applet
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my code is as follows
I want to make sure that this applet works on IE and
Netscape , can i ?
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DriverManager.registerDriver (new
oracle.jdbc.driver.OracleDriver());
// Connect to the database.
conn = DriverManager.getConnection
("jdbc:oracle:thin:@noah:1521:
noahDb","scott","tiger");
I have replaced machine name with ip, no effect
any help will be cordially appreciated
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You're hitting the applet sandbox trap. One of the key rules is:
"An applet cannot make network connections except to the host that it came from."
Technically, a SQL*Net session is a network connection onto a new host. Read up on the recommended work arounbd for this one:
http://java.sun.com/docs/books/tutorial/applet/practical/workaround.html
HTH
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Developing Custom Applet in Oracle Webcenter

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We can create custom component in Oracle Webcenter Content Server.
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OOTB there is only one page I'm aware that contains links to applets: Administration - Applet Admin.
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I saw one reply here saying applets cannot connect to
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I saw one reply here saying applets cannot connect todatabase.
That isn't true.
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