NoClassDefFoundError: wrong name

[Elton Hughes]

Hello All,

I am trying out Velocity for the first time and I have written a simple program.

  
package org.novaworks.ch02;
 
import java.io.StringWriter;
import java.io.Writer;
 
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.Velocity;
 
public class HelloWorld {
 
public static void main(String[] args) throws Exception {

// init Velocity
Velocity.init();

// get the template
Template template = Velocity.getTemplate("src/templates/ch02/HelloWorld.vm");

// create a context for Velocity
VelocityContext context = new VelocityContext();

// create the output
Writer writer = new StringWriter();
template.merge(context, writer);

// write out
System.out.println(writer.toString());

}

}

It compiles, but when I run the program I get the following message.

-> java HelloWorld
Exception in thread "main" java.lang.NoClassDefFoundError: HelloWorld (wrong name: org/novaworks/ch02/HelloWorld)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:539)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:251)
at java.net.URLClassLoader.access$100(URLClassLoader.java:55)
at java.net.URLClassLoader$1.run(URLClassLoader.java:194)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:187)
at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:274)
at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
->

Unfortunately, I do not understand the error message. Everything looks correct to me. Maybe someone else's eyes can help me out.

Thanks!

Elton

[Yevgeniy Treyvus]

Try:

java org.novaworks.ch02.HelloWorld

[Ko Ko Naing]

Yevgeniy is right, Elton...

To second that, you should be in the folder that is the parent folder of org/novaworks/ch02/ path... Then since your HelloWorld java application is in that package, you have to specify the full correct path to the package so that JVM can see that...

Hope my explanation helps...