import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

/*
* Class to parse PatientBill objects from XML file
*/
public class PatientBillParser
{
private ArrayList<PatientBill> patients;
private Document dom;

// Constructor
public PatientBillParser()
{
   patients = new ArrayList<PatientBill>();
}

// Method to run example
public void runExample()
{
   //parse the xml file and get the dom object
   parseXMLFile();

   //get each patient element and create a PatientInfo object
   parseDocument();

   //Iterate through the list and print the data
   printData();

}

// Method to parse XML file
private void parseXMLFile()
{
   DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
   try{
         DocumentBuilder db = dbf.newDocumentBuilder();
         dom = db.parse("Patient.xml");
   }catch(ParserConfigurationException pce)
   {
         pce.printStackTrace();
   }catch(SAXException se)
   {
         se.printStackTrace();
   }catch(IOException ioe)
   {
         ioe.printStackTrace();
   }
}

// Method to parse document
private void

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