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    <p>You have too many <code>XmlRootElements</code>, you generally want to use this with the top element only. What you want to do is label the children as <code>XmlElement</code>.</p> <p>Remove the <code>XmlRootElement</code> annotation from all but your root element (i.e. <code>RtSuperQuickMetadata</code>), and label them with <code>XmlElement</code> <em>in the class from which they will be loaded</em>.</p> <p>So, as an example, here is how your <code>RtSuperQuickMetadata</code> class should look:</p> <pre><code>@XmlRootElement(name = "contentFiles") class RtSuperQuickMetadata { private List&lt;RtSuperQuickMetadataItem&gt; rtSuperQuickMetadataItems; public RtSuperQuickMetadata() { rtSuperQuickMetadataItems = new ArrayList&lt;RtSuperQuickMetadataItem&gt;(); } @XmlElement(name = "contentFile") public List&lt;RtSuperQuickMetadataItem&gt; getRtSuperQuickMetadataItems() { return rtSuperQuickMetadataItems; } public void setRtSuperQuickMetadataItems( List&lt;RtSuperQuickMetadataItem&gt; rtSuperQuickMetadataItems) { this.rtSuperQuickMetadataItems = rtSuperQuickMetadataItems; } } </code></pre> <p>Transfer this principle to <code>alternateDocNumbers</code> and <code>citesAffected</code> as well.</p> <hr> <p>If you want to see an example of how the <code>Unmarshaller</code> thinks your XML is formatted based off your annotations, you can create your structure in code and use the <code>Marshaller</code>. Here is a quick and ugly example:</p> <pre><code>RtSuperQuickMetadata rtSuperQuickMetadata = new RtSuperQuickMetadata(); List&lt;RtSuperQuickMetadataItem&gt; rtSuperQuickMetadataItems = new ArrayList&lt;RtSuperQuickMetadataItem&gt;(); rtSuperQuickMetadata.setRtSuperQuickMetadataItems(rtSuperQuickMetadataItems); RtSuperQuickMetadataItem item = new RtSuperQuickMetadataItem(); rtSuperQuickMetadataItems.add(item); ArrayList&lt;Cite&gt; cites = new ArrayList&lt;Cite&gt;(); Cite cite = new Cite(); cite.setCiteStr("MyCite"); cites.add(cite); item.setCitesAffected(cites); Marshaller m = jaxbContext.createMarshaller(); m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true); m.marshal(rtSuperQuickMetadata, System.out); </code></pre> <p>This will output the result to <code>System.out</code>. You can put this in a file instead, whatever suits your needs.</p>
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    1. COThat worked. Thanks! I had another question. Why doesn't jaxb automatically allocate memory for the lists contained in the object. Why do we need to assign memory in a constructor for it ?
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    2. COFrankly, I don't know the answer to your question. My best guess is because we use interfaces when declaring our variables therefore JAXB has no knowledge of the actual implementation of the `List` to use. That is where we come in to say: use `ArrayList`.
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    3. CO@Phoenix - You do not need to pre-initialize values for `List` properties.
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      1. USBlaise Doughan
 

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