Copy an xml node

Question

<TestCase>
<AuthorizePaymentRq>
<amount>3.1415926535897932384626433832795</amount>
<method>Debit</method>
<parameters>
<PaymentParameter>
<Name>String</Name>
<Value>String</Value>
</PaymentParameter>
</parameters>
</AuthorizePaymentRq>
<LOB>PL</LOB>
<ReferenceNumber>234234553</ReferenceNumber>
<Applicantid>886</Applicantid>
</TestCase>
this is my xml file. i need to parse it and i used dom do it.
i need to copy a node of this xml and put it in to string.
for example my target will be like this
String p= "<AuthorizePaymentRq>
<amount>3.1415926535897932384626433832795</amount><method>Debit</method><parameters> <PaymentParameter><Name>String</Name> <Value>String</Value> </PaymentParameter></parameters>
</AuthorizePaymentRq>".
please give me a quick reply ASAP please..

Answer 1

i am posting this question again for help.
my request to a service will go like this
String response = proxy.doAuthorizePayment(lob,RefNumber,appid,XMLInput as a string);
XMLInput should be a string in xml format which i have to copy from the xml that i gave. please solve this..
NodeList LOB = doc.getElementsByTagName("LOB");
          NodeList ReferenceNumber = doc.getElementsByTagName("ReferenceNumber");
          NodeList Applicantid = doc.getElementsByTagName("Applicantid");
          Node node;
               node = LOB.item(0);
               String lob=node.getChildNodes().item(0).getNodeValue();
     System.out.println(lob+"LOB");
     node=ReferenceNumber.item(0);
          String RefNumber=node.getChildNodes().item(0).getNodeValue();
          System.out.println(RefNumber+"RefNumbe Here");
          node=Applicantid.item(0);
          String appid=node.getChildNodes().item(0).getNodeValue();
                         System.out.println(appid+"Applicantid Here");