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michael.miceli88@gmail.com 06-09-2008 04:07 PM

dom4j NoClassDefFoundError
 
I have simple application
Code:

import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.Document;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;
import java.io.FileWriter;
import java.io.IOException;

public class Foo {
    public Document createDocument() {
        Document document = DocumentHelper.createDocument();
        Element root = document.addElement( "root" );

        Element author1 = root.addElement( "author" )
            .addAttribute( "name", "James" )
            .addAttribute( "location", "UK" )
            .addText( "James Strachan" );

        Element author2 = root.addElement( "author" )
            .addAttribute( "name", "Bob" )
            .addAttribute( "location", "US" )
            .addText( "Bob McWhirter" );

        return document;
    }
  public static void main(String[] args){
    Foo ex = new Foo();
    try{
        FileWriter out = new FileWriter( "foo.xml" );
        Document document;
        document = ex.createDocument();
        document.write( out );
    }
    catch(IOException e){
        System.out.println("Unable to create file:" + e.getMessage());
    }
  }
}

and I also have
Code:

dom4j-1.6.1.jar
in the same directory
I compiled the app with
Code:

javac Foo.java -classpath
dom4j-1.6.1.jar

and got no errors, but when I run the code I
get this error
Code:

Exception in thread "main"
java.lang.NoClassDefFoundError: org/dom4j/DocumentHelper
        at Foo.createDocument(Foo.java:12)
        at Foo.main(Foo.java:32)
Caused by: java.lang.ClassNotFoundException: org.dom4j.DocumentHelper
        at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
        ... 2 more

What am I doing wrong. If I unjar the dom4j-1.6.1.jar the
class labeled DocumentHelper is there.
Thanks,

Roedy Green 06-10-2008 06:11 AM

Re: dom4j NoClassDefFoundError
 
On Mon, 9 Jun 2008 09:07:34 -0700 (PDT), michael.miceli88@gmail.com
wrote, quoted or indirectly quoted someone who said :

>by: java.lang.ClassNotFoundException:


This is my least favourite error message because it has dozens of
possible causes.
see
http://mindprod.com/jgloss/runerrorm...SDEFFOUNDERROR
--

Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com


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