title: Primefaces dataTable is not rendered
body: <p>i cannot find out what i am doing wrong, so that my dataTable is not shown on the webpage.</p>
  
  <p>The User class i created is not really complicated but has more than these three properties which i try to set in the bean.</p>
  
  <p>The only thing that is displayed is the facet Text "Test Header"</p>
  
  <p>What am i missing?</p>
  
  <p>Testmonitor .xhtml</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;!DOCTYPE html&gt;
  &lt;html xmlns="http://www.w3.org/1999/xhtml"
        xmlns:h="http://java.sun.com/jsf/html"
        xmlns:f="http://java.sun.com/jsf/core"
        xmlns:ui="http://java.sun.com/jsf/facelets"
        xmlns:p="http://primefaces.org/ui"&gt;
      &lt;head&gt;
          &lt;title&gt;Test Monitor&lt;/title&gt;
          &lt;meta content='text/html; charset=UTF-8' http-equiv="Content-Type"/&gt;
      &lt;/head&gt;
      &lt;body onload="#{testdata.createUsers()}"&gt;
          &lt;p:dataTable id="overviewTable" var="collector" sortOrder="descending" value="#{testdata.userList}"&gt;
  
              &lt;f:facet name="header"&gt;
                  Test Header
              &lt;/f:facet&gt;
  
              &lt;p:column headerText="IP"&gt;
                  &lt;h:outputText value="#{collector.ip}" /&gt;
              &lt;/p:column&gt;
  
              &lt;p:column headerText="CollectorID"&gt;
                  &lt;h:outputText value="#{collector.collectorId}" /&gt;
              &lt;/p:column&gt;     
  
              &lt;p:column headerText="ID"&gt;
                  &lt;h:outputText value="#{collector.id}" /&gt;
              &lt;/p:column&gt;                                        
  
  
          &lt;/p:dataTable&gt;
      &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>Bean:Testdata.java</p>
  
  <pre><code>package MonitorTest;
  
  
  import UserAndPosition.User;
  import javax.faces.bean.ManagedBean;
  import javax.faces.bean.SessionScoped;
  import java.util.List;
  
  
  @ManagedBean
  @SessionScoped
  public class Testdata {
  
      private List&lt;User&gt; UserList;
      private User aUser=new User();
  
      public void createUsers() {
          aUser.setCollectorId("AnyCollectorID");
          aUser.setId("WND9L320NDUD");
          aUser.setIp("192.168.2.1");
  
          UserList.add(aUser);
          //System.out.println("Post Construct durchgelaufen");
  
      }
      /**
       * Regular Getter- and Setter Methods.
       */
      public Testdata() {
      }
  
      public List&lt;User&gt; getUserList() {
          return UserList;
      }
  
      public void setUserList(List&lt;User&gt; UserList) {
          this.UserList = UserList;
      }
  
  }
  </code></pre>
  
  <p>Thanks in advance</p>