NoClassDefFoundError with my jar-application using Oracle JDBC driver

Posted on 2002-03-22
Last Modified: 2013-11-23
Hi ppl,

There's an application uses Oracle JDBC driver. When I run it  as .class-files thru java <mypackage.myMainClass> it works fine. Now I've made a jar-version of my application. But when I run it as java -jar <myjar> I've got Exception in thread "main" java.lang.NoClassDefFoundError: oracle/jdbc/driver/OracleDriver

My CLASSPATH is the same and it's correct. I'm not sure there's a problem with my jar file, Oracle JDBC driver or something else.

Just FYI:
J2SDK 1.4.0 under Windows XP
Oracle JDBC drivers (versions 8.1.7 and 9.0.1)

Question by:AndrewRodionov
  • 3
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LVL 16

Expert Comment

ID: 6888021
post your CLASSPATH


Author Comment

ID: 6888030
LVL 16

Accepted Solution

heyhey_ earned 100 total points
ID: 6888040

Execute a program encapsulated in a JAR file. The first
     argument is the name of a JAR file instead of a startup
     class name. In order for this option to work, the manifest of
        the JAR file must contain a line of the form
        Main-Class: classname.
        Here, classname identifies the class having the
        public static void main(String[] args) method that serves as your application's starting point. See
        the Jar tool reference page and
        the Jar trail of the
        Tutorial for information about working with Jar files and
        Jar-file manifests.
When you use this option, the
        JAR file is the source of all user classes, and other user class
        path settings are ignored.

so you have to put all needed classes inside the same .jar file (or use different startup method)

Author Comment

ID: 6888046

Author Comment

ID: 6888069
I see.
I've found an info how classes are found. Here is a quote: "...The JAR archive specified by the -jar option, which overrides all other values. If this option is used, all user classes come from the specified archive."

Terrible... Anyway, thanks.

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