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jar executable won't work when copied into desktop  RSS feed

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I have a GUI application called 'GUI' which connects to a oracle database. I copied the classes12.jar for the JDBC connection from c:\oracle\ora92\jdbc\lib into my local directory c:\myfolder\java where I have my GUI application. I have the manifest file, 'manifest.txt' to have -

Main-Class: GUI<cr>
Class-Path: classes12.jar<cr>

From the DOS prompt I am doing -

C:\MyFolder\Java> jar mcf GUI.jar GUI*.class

Now double-clicking on GUI.jar executable from C:\MyFolder\Java works fine and gets connected to the database without any problem.

But when I copy the same GUI.jar into my desktop window and do the same I am only getting the first opening screen from my GUI but hangs when trying to connect to the database.

Also, if I copy the jar executable into another directory and try it run it from the command prompt I get the error as shown below -

C:\>java -jar GUI.jar
Error :
java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver

I have tried to modify the Manifest.txt file several ways giving full path to the classes12.jar in the Class-Path and also directory path to the entry point in Main-Class. Nothing seems to work. One of the such way is like -

Main-Class: MyFolder.Java.GUI<cr>
Class-Path: C:/MyFolder/Java/classes12.jar

The contents in the jar is as follows -

C:\MyFolder\Java>jar tf GUI.jar

Any idea what am I doing wrong?
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Java Oracle Spring
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If you are using classes12.jar in you application then it should be in your classpath

add the location of classes12.jar in your classpath

It should solve your problem

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please don't double post.
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