Applets: DriverManager.registerDriver NoClassDefFoundError

Question

Basically, I can get a Java Program to work, but an applet with the same code fails. I'm running j2sdk 1.4.1.02 under Windows 2000, with Oracle 9i and Internet Explorer 6.0.
CreateJoltData is just a plain Java program; JoltData is an Applet (Included below). Both use the same statement to register the Oracle Driver. It's the one that is used in all of the books and the Oracle webpages:
DriverManager.registerDriver(new Oracle.jdbc.OracleDriver());
I can connect and access an Oracle database from the Java program (CreateJoltData)...but not the Applet (JoltData).
If I use the Classpath: .;C:\oracle\ora92\jdbc\lib\classes12_g.zip:
- The program compiles and executes just fine.
- The Java Applet compiles but gets a runtime error that usually means that the Classpath is not set correctly:
java.lang.NoClassDefFoundError: orable/jdbc/OracleDriver.
If I use the Classpath: .;C:\oracle\ora92\jdbc\lib\ojdbc14_g.zip
(which Oracle recommends), both the program and the applet get a compile error:
Package Oracle.jdbc does not exist.
Any help would greatly be appreciated!!!
Donna
------------------ JoltData.java:
/* JoltData
compile: javac JoltData.java
execute: JoltData.html
import java.applet.*;
import java.awt.*;
import java.io.*;
import java.sql.*;
import oracle.sql.*;
import oracle.jdbc.*;
public class JoltData extends Applet {
String database= "Coffee";
String username = "Donna";
String password = "v1v1enne";
Connection conn=null;
// Constructor
public JoltData () {
System.out.println("username " +username );
System.out.println("password " +password );
registerDB();
connectDB();
// Register Driver
private void registerDB() {
System.out.println("registerDB " );
try {
DriverManager.registerDriver(new
oracle.jdbc.OracleDriver());
System.out.println("registerDB done.");
} catch (Exception e) {
System.err.println("problems registering .");
// Connect To Database
private void connectDB() {
System.out.println("connectDBURL." );
try {
conn = DriverManager.getConnection
("jdbc:oracle:oci8:@" + database,
username,
password);
// Create a statement
Statement stmt = conn.createStatement ();
stmt = conn.createStatement();
System.out.println("connectDB: Connection done. ");
} catch (Exception e) {
System.err.println("connectDB: problems connecting to
database. ");
public void main (String[] args) {
JoltData converter = new JoltData ();
}

Answer 1

After much (MUCH) hair pulling, I have my Applet accessing my database (and, more troubles to come, I'm sure :-) . Without Rauf Sarwar's help, I'd probably be bald!
Here's what the final solution is (first example line is generic; the second, is my setting):
- Make sure that the Classpath includes an entry for the Oracle drivers:
.;[driver].zip
.;C:\oracle\ora92\jdbc\lib\classes12.zip
- The subdirectory containing the java class file (executable) should also
contain the Oracle driver.
- HTML file needs to contain: archive=[driver].zip
<APPLET CODE="[name].class" archive="[driver].zip ">
<APPLET CODE="JoltData.class" archive="classes12.zip ">
- Java.policy needs a line for SocketPermissions:
permission java.net.SocketPermission "[hostname]", "connect,resolve";
permission java.net.SocketPermission "Waltz", "connect,resolve";
- Java.policy needs a line for PropertyPermission for Oracle:
permission java.util.PropertyPermission "oracle.jserver.version",
"read, write";
Oh, and, in the "catch" put the following line...it helped immensely!!
System.out.println(e.toString());
Again, lotsa thanks goes to Rauf Sarwar for this solution!!!
Donna