Problems with classpath and oracle drivers

Question

Hi, i've developed an application that uses oracle drivers "classes12.jar" using Eclipse. While i was writing the code, i manually specified the classpath which contains "classes12.jar" file using Eclipse's own configuration tool and now it works perfect when i run it under Eclipse. I then tried to run it using dos prompt but when i tried to run the program i got "ClassNotFoundException: oracle.jdbc.driver.oracledriver". As you can guess, i thought that was a classpath issue so i set the classpath as follows:
set CLASSPATH=C:\oracle\ora92\jdbc\lib
where the directory "C:\oracle\ora92\jdbc\lib" is the one that contains classes12.jar file which i had also specified using Eclipse before.
After that, i recompiled my application and tried to launch it as follows:
->javac Test.java
->java Test
But then i got the following runtime error:
Exception in thread "main" java.lang.NoClassDefFoundError: Test
Since this happened after i manually set CLASSPATH variable, this has something to do with that. What should i do now? Thanks in advance.

Answer 1

Correct - the JAR has to be spelled out in the CLASSPATH.
I'd also recommend that you not set CLASSPATH using a system environment variable. Better to use the -classpath parameter on javac.exe when you compile and java.exe when you run. Put the command into a script that you invoke when you start up the app. It'll document the fact that it's needed for anyone that comes after you and relieves you from having to change the CLASSPATH on machines you deploy to. And, for good measure, app servers like Tomcat and WebLogic totally ignore the system CLASSPATH. I don't even have one.
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