java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver

[ljustiniano]

Hi everybody

I'm new in java Platform and i have problems trying to load a JDBC driver using Class.forname, but JVM can not find it. I configured classpath enviroment path pointig to libraries

OS: Windows XP
Java Version 1.6
IDE Eclipse 3.2.2

classpath = .;C:\Program Files\Altova\xmlspy\XMLSpyInterface.jar;c:\program files\Microsoft SQL Server 2000 Driver for JDBC\lib\msbase.jar;c:\program files\Microsoft SQL Server 2000 Driver for JDBC\lib\msutil.jar;c:\program files\Microsoft SQL Server 2000 Driver for JDBC\lib\mssqlserver.jar;D:\oracle\ora92\jdbc\lib\ classes12.zip


java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at bpos.Db.Conectar(Db.java:20)
at bpos.Process.main(Process.java:19)


Can anybody help me about this? It will appreciate.

Leo

[netrista]

Hello Leo,

Try putting the full path to the Oracle classes12.zip file at the front of the CLASSPATH. Also remove the extra space between the \ and classes12.zip.

Before you test with an app, ensure the driver returns version information by running this command on the command line:

java oracle.jdbc.driver.OracleDriver

If that command does not work, you still have environment problems and need to revisit before you test with the app.

Best regards,
Netrista Khatam
Technical Services Manager
OpenLink Product Support

[ljustiniano]

Hi Netrista.. thank you for your help.. I checked my enviroment variables and i didn't find problems. I think that was copy paste mistake. I put first the oracle driver library reference into the classpath enviroment variable

C:\>echo %classpath%
.;D:\oracle\ora92\jdbc\lib\classes12.zip;C:\Progra m Files\Altova\xmlspy\XMLSpyInterface.jar;c:\program files\Microsoft SQL Server 2000 Driver for JDBC\lib\msbase.jar;c:\program files\Microsoft SQL Server 2000 Driver for JDBC\lib\msutil.jar;c:\program files\Microsoft SQL Server 2000 Driver for JDBC\lib\mssqlserver.jar

I performed your suggested command and i couldn't get the version of each class i'm trying to use

C:\>java oracle.jdbc.driver.OracleDriver
Exception in thread "main" java.lang.NoSuchMethodError: main

C:\>java com.microsoft.jdbc.sqlserver.SQLServerDriver
null

any other thing that it could be used? thanks!

Leo

[netrista]

Hello Leo,

This is what I would recommend:

1. Verify that the following path is correct:

D:\oracle\ora92\jdbc\lib\classes12.zip

2. Insure no permissions issues exist on that file or directory structure, which is unlikely since it is Windows.

3. Run this command to get your java version:

java -version

4. Insure that the java version of the JVM/JDK that you have installed on Windows is compatible with the requirements of the driver.

Can you state whether or not you can use the other JDBC drivers to get a connection using the application, even though they error on the commandline with DOS. I've seen that before, so it's important to ascertain whether the app connectivity issue is specific to Oracle or generalized to all JDBC connections.


Best regards,
Netrista Khatam
Technical Services Manager
OpenLink Product Support

[ljustiniano]

Thank you very much.

The classpath was correct. I proved on command line and it worked correctly. So i have to change my approach looking for into my IDE project definition parameters. I' m using Eclipse and i found that i have to define a classpath for the project.

Ups! I'm new in Eclipse too.. and i forgot mention it. Your description of the solution helped me to find the final solution. Thank you!

Leo

[adkan11]

Hello Leo,

Try putting the full path to the Oracle classes12.zip file at the front of the CLASSPATH. Also remove the extra space between the \ and classes12.zip.

Before you test with an app, ensure the driver returns version information by running this command on the command line:

java oracle.jdbc.driver.OracleDriver

If that command does not work, you still have environment problems and need to revisit before you test with the app.

Best regards,
Netrista Khatam
Technical Services Manager
OpenLink Product Support

Hi netrista,

I'm using oracle 10g express edition. And using myeclipse 7.0
Right now the same error is being thrown here. Can you tel somthng abt it.??? I mean What should i do abt it..???

Waiting for reply... Will be appreciable...
Thnx.

[j2me64]

Waiting for reply... Will be appreciable...
Thnx.

I had the same problem in eclipse with mysql-driver. But then I tried this: right-click the project that need the db-driver and select "Run As" then "Run Configuration". in the classpath-tab select "Add External JARs" and then navigate to the folder where the db-jar file is and select it. compile and let me know ... good luck.