Databases
StackOverflow2013
Postsdbo
POVery simple Apache-commons configuration example throws NoClassDefFoundError
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POVery simple Apache-commons configuration example throws NoClassDefFoundError
    primarykey
    data
    text
    <p>I'm trying to test <a href="http://commons.apache.org/proper/commons-configuration/userguide/howto_beans.html#An_Example" rel="noreferrer">a very simple example</a> given in the Apache-commons configuration library user's guide regarding declaring and creating beans. I copied the code in the example almost word by word, and yet I'm getting a NoClassDefFoundError exception.</p> <p>Here is the xml file I'm using - <code>windowcongif.xml</code>:</p> <pre><code>&lt;?xml version="1.0" encoding="ISO-8859-1" ?&gt; &lt;config&gt; &lt;gui&gt; &lt;windowManager config-class="test.DefaultWindowManager" closable="false" resizable="true" defaultWidth="400" defaultHeight="250"&gt; &lt;/windowManager&gt; &lt;/gui&gt; &lt;/config&gt; </code></pre> <p>Here is the code in the file <code>WindowManager.java</code>:</p> <pre><code>package test; public interface WindowManager {} </code></pre> <p>Here is the code in the file <code>DefaultWindowManager.java</code>:</p> <pre><code>package test; public class DefaultWindowManager implements WindowManager { private boolean resizable; private boolean closable; private int defaultWidth; private int defaultHeight; } </code></pre> <p>Here is the code in the file <code>Main.java</code>:</p> <pre><code>package test; import org.apache.commons.configuration.ConfigurationException; import org.apache.commons.configuration.XMLConfiguration; import org.apache.commons.configuration.beanutils.BeanDeclaration; import org.apache.commons.configuration.beanutils.BeanHelper; import org.apache.commons.configuration.beanutils.XMLBeanDeclaration; public class Main { public static void main(String[] args) throws ConfigurationException { XMLConfiguration config = new XMLConfiguration("windowconfig.xml"); BeanDeclaration decl = new XMLBeanDeclaration(config, "gui.windowManager"); WindowManager wm = (WindowManager) BeanHelper.createBean(decl); } } </code></pre> <p>Here is the output during runtime:</p> <pre><code>Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/beanutils/PropertyUtils at org.apache.commons.configuration.beanutils.BeanHelper.initProperty(BeanHelper.java:269) at org.apache.commons.configuration.beanutils.BeanHelper.initBeanProperties(BeanHelper.java:229) at org.apache.commons.configuration.beanutils.BeanHelper.initBean(BeanHelper.java:166) at org.apache.commons.configuration.beanutils.DefaultBeanFactory.initBeanInstance(DefaultBeanFactory.java:108) at org.apache.commons.configuration.beanutils.DefaultBeanFactory.createBean(DefaultBeanFactory.java:64) at org.apache.commons.configuration.beanutils.BeanHelper.createBean(BeanHelper.java:336) at org.apache.commons.configuration.beanutils.BeanHelper.createBean(BeanHelper.java:358) at org.apache.commons.configuration.beanutils.BeanHelper.createBean(BeanHelper.java:372) at test.Main.main(Main.java:23) Caused by: java.lang.ClassNotFoundException: org.apache.commons.beanutils.PropertyUtils at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:423) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:356) ... 9 more </code></pre> <p><strong>How do I make this simple example work?</strong></p> <p>I'm using version 1.9 of the commons-configuration package, auto-imported by IntelliJ IDEA after putting the dependency in the <code>pom.xml</code> file, and version 1.7.0_17 of java running on Windows 8 64bit.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USJoe
    1. USJoe
    plurals
    1. PL
      singulars
      1. LTLinked
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POVery simple Apache-commons configuration example throws NoClassDefFoundError
      1. USJoe
      1. VTFavorite
    2. VO
      singulars
      1. POVery simple Apache-commons configuration example throws NoClassDefFoundError
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload