Adding 2 XML Documents in Java.Please help.

[luthriaajay]

Has anyone used the 'importNode' and the 'replaceChild' methods
of Interface Document and Node or adding 2 XML documents ?

I need to add 2 XML documents in Java.

DocumentOne 
-----------
<?xml version="1.0" encoding="UTF-8"?>
<i:Interest xmlns:i="http://www.ABC.com/interests:i">
<i:ID>0</i:ID><i:Generation/>
<i:Delta/><i:Ref/>
</i:Interest>

DocumentTwo
-----------

<i:Underlying xmlns:i="common" xmlns:common="http://www.ABC.com/common" value="KGF">
  <common:Code>KGF</common:Code> 
  <common:Class>STOCK</common:Class> 
</i:Underlying>


Output Format
-------------

<?xml version="1.0" encoding="UTF-8"?>
<i:Interest xmlns:i="http://www.ABC.com/interests:i">
<i:ID>0</i:ID><i:Generation/>
<i:Delta/><i:Ref/>
<i:Underlying xmlns:i="common" xmlns:common="http://www.ABC.com/common" value="KGF">
  <common:Code>KGF</common:Code> 
  <common:Class>STOCK</common:Class> 
</i:Underlying>
</i:Interest>

My Java code is trying to use this

DocumentOne.importNode(DocumentTwo,true)
DocumentOne.replaceChild...

Please,has anyone used the above methods?
How can I add both the XML docs?

Help really appreciated

[luthriaajay]

Help required for the above query.