Exception in thread "main" java.lang.NoClassDefFoundError: org/dom4j/io/SAXReader

Question

I am trying to compile and run the following class:

import org.dom4j.io.SAXReader;
import org.dom4j.Document;
import org.dom4j.Element;

import java.net.URL;
import java.net.Authenticator;
import java.net.PasswordAuthentication;
import java.util.List;

/**
 * Java client program to demonstrate how to access Hudson remote API.
 *
 * @author Kohsuke Kawaguchi
 * @see http://hudson.gotdns.com/wiki/display/HUDSON/Remote+access+API
 */
public class Main {
    @SuppressWarnings("unchecked")
    public static void main(String[] args) throws Exception {
        // every Hudson model object exposes the .../api/xml, but in this example
        // we'll just take the root object as an example
        URL url = new URL("http://deadlock.netbeans.org/hudson/api/xml");

        // if you are calling security-enabled Hudson and
        // need to invoke operations and APIs that are protected,
        // consult the 'SecuredMain" class
        // in this package for an example using HttpClient.

        // read it into DOM.
        Document dom = new SAXReader().read(url);

        // scan through the job list and print its status
        for( Element job : (List<Element>)dom.getRootElement().elements("job")) {
        //for( Element job : (java.util.List<org.dom4j.Element>)dom.getRootElement().elements("job")) {
            System.out.println(String.format("Name:%s\tStatus:%s",
                job.elementText("name"), job.elementText("color")));
        }
    }
}

I compile it using:

javac -cp /usr/share/java/dom4j.jar Main.java

But when I am trying to run it, I get an exception:

$ java Main

Exception in thread "main" java.lang.NoClassDefFoundError: org/dom4j/io/SAXReader at Main.main(Main.java:31) Caused by: java.lang.ClassNotFoundException: org.dom4j.io.SAXReader at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) ... 1 more

If I look at the jar file:

jar tvf /usr/share/java/dom4j.jar | grep SAXReader*

1061 Mon Jan 25 09:34:34 EST 2010 org/dom4j/io/SAXReader$SAXEntityResolver.class 13170 Mon Jan 25 09:34:34 EST 2010 org/dom4j/io/SAXReader.class

The 'missing' classes are present in the JAR. Any idea on how to resolve this?

try adding a semicolon after the classpath decalration in the command — MozenRath, Jun 20 '12 at 05:19

score 1 · Answer 1 · edited Jun 20 '12 at 10:08

1

You need to use the same class path while running as well

java -cp /usr/share/java/dom4j.jar;. Main

edited Jun 20 '12 at 10:08

Devon_C_Miller

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answered Jun 20 '12 at 05:19

Subin Sebastian

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when i use the syntax exactly like you suggest, i get: java -cp /usr/share/java/dom4j.jar;. Main Usage: java [-options] class [args...] (to execute a class) or java [-options] -jar jarfile [args...] (to execute a jar file) .......... -bash: Main: No such file or directory – kamal Jun 20 '12 at 12:57

Exception in thread "main" java.lang.NoClassDefFoundError: org/dom4j/io/SAXReader

1 Answers1