NoClassDefFoundError

[Doug]

Hey all,

Now that I have the 3 .jar files in my classpath I get a new error:

Exception in thread "main" java.lang.NoClassDefFoundError:
com/microsoft/jdbc/base/BaseDriver
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:486)
at
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:111)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:248)
at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:297)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:286)
at java.lang.ClassLoader.loadClass(ClassLoader.java:253)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:120)
at jdbctest.main(jdbctest.java:6)

My code is simply this:

import java.sql.*;

public class jdbctest {
public static void main(String args[]) {
try {
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
}
catch (Exception e) {
System.out.println(e.toString());
}
}
}

[Sridhar Paladugu[CompCon tech]]

HI,

If your CLASSPATH environment varriable contains reference to the 3 jar
files then this should not happen. You can do use extension mechanism. Copy
3 jar files to
%JDK_HOME%\jre\lib\ext\

and reboot the system just to make sure that JVM updates CLASSPATH.
Let me know if you still have this problem and i will be glad to resolve it.

Thanks

Sridhar Paladugu
Microsoft Developer Support
JDBC Webdata

This posting is provided "AS IS" with no warranties, and confers no rights.

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[Jon Skeet]

Sridhar Paladugu[CompCon tech] <sr...@online.microsoft.com> wrote:
> If your CLASSPATH environment varriable contains reference to the 3 jar
> files then this should not happen. You can do use extension mechanism. Copy
> 3 jar files to
> %JDK_HOME%\jre\lib\ext\
>
> and reboot the system just to make sure that JVM updates CLASSPATH.
> Let me know if you still have this problem and i will be glad to resolve it.

You don't need to reboot the system, although you will need to restart your
app, I believe.

Note that by default, 2 JREs are installed when you install the JDK. You
need to make sure the jar files are in the correct place (or both). See
http://www.pobox.com/~skeet/java/extensions.html for details of this
gotcha.

--
Jon Skeet - <sk...@pobox.com>
http://www.pobox.com/~skeet/
If replying to the group, please do not mail me too