XOM API for Processing XML with Java

[tcdfemgdnf AT snkmail.com]

Greetings all,

Sorry if this is a stupid question but I'm new to XML and trying to 
figure out how to export a XML file from my Java app.
I'm using XOM-1.2.10 and Java JRE 1.8.0_31-b13.  My program (not 
production quality) writes the attached stuff.xml which I believe looks 
reasonable, but when I try to read it, line 73 /int kids = 
record.getChildCount();///sets kids to 9. I don't understand why since I 
attach 4 elements to the "record" element.

BTW, I just added the serial number to the "record" element because I 
was seeing unexpected behavior.  I'd like to remove it and have just
    <file ...>
        <record>
            <field id="1stfieldName">1stvalue</field>
            <field id="2ndfieldName">2nd field value</field>
            <field id="3rdfieldName">3rdfield value</field>
        <record>
        <record>
            <field id="1stfieldName">1stvalue</field>
            <field id="2ndfieldName">2nd field value</field>
            <field id="3rdfieldName">3rdfield value</field>
        <record>
</file>

Am I on the right track or do I need to learn a lot more about XML 
before I try this in the real world?

TIA for whatever advice I can get.
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import nu.xom.Attribute;
import nu.xom.Attribute.Type;
import nu.xom.Builder;
import nu.xom.Comment;
import nu.xom.DocType;
import nu.xom.Document;
import nu.xom.Element;
import nu.xom.Elements;
import nu.xom.ParsingException;
import nu.xom.Serializer;

/**
 *
 * @author mag
 */
public class Main {

    File xmlFile;
    private int recNum = 0;

    public Main() {
        xmlFile = new File("stuff.xml");
        write();
        try {
            read();
        }
        catch (ParsingException | IOException xx) {
            xx.printStackTrace(System.err);
        }
    }

    private void read() throws ParsingException, IOException {
        System.out.format("%s  %s\n", xmlFile.getAbsolutePath(), 
xmlFile.exists());
        FileInputStream is = new FileInputStream(xmlFile);

        int indent = 0;
        String nam = null;
        String val = null;
        java.util.Stack<String> stack = new java.util.Stack<>();

        Builder builder = new Builder();
        Document doc = builder.build(is);


        Element root = doc.getRootElement();
        System.out.format("<%s", root.getLocalName());
        for (int inx = 0; inx < root.getAttributeCount(); inx++) {
            System.out.format(" %s=\"%s\"", 
root.getAttribute(inx).getLocalName(),
                                            
root.getAttribute(inx).getValue());
        }
        System.out.println(">");

        recNum = 0;

        Elements records = root.getChildElements(String.format("record%08d", 
++recNum));
        int rcdIdxCnt = records.size();
        for (int rcdIdx = 0; rcdIdx < rcdIdxCnt; rcdIdx++) {
            Element record = records.get(rcdIdx);
            stack.push(record.getLocalName());
            System.out.format("%s<%s", indent(++indent), stack.peek());

            // No attributes for record
            String atr = "";
            int atrCnt = record.getAttributeCount();
            for (int atrInx = 0; atrInx < atrCnt; atrInx++) {
                Attribute attribute = record.getAttribute(atrInx);
                nam = attribute.getLocalName().trim();
                val = attribute.getValue().trim();
                atr += String.format(" %s=\"%s\"", nam, val);
            }
            int kids = record.getChildCount();
// kids is now set to 9
            System.out.format(">%s</%s>\n", record.getValue(), stack.empty() 
? "?" : stack.pop());      // <record>

//            for (int rcdIdxInx = 0; rcdIdxInx < record.getChildCount(); 
rcdIdxInx++) {
//                Elements fields = record.getChildElements();
//                ++indent;
//                int fldCnt = fields.size();
//                for (int fldInx = 0; fldInx < fields.size(); fldInx++) {
//                    Element field = fields.get(fldInx);
//                    System.out.format("%s<%s", indent(indent), 
field.getLocalName());
//                    atrCnt = field.getAttributeCount();
//                    for (int atrInx = 0; atrInx < atrCnt; atrInx++) {
//                        Attribute attr = field.getAttribute(atrInx);
//                        nam = attr.getLocalName();
//                        val = attr.getValue();
//                        System.out.format(" %s=\"%s\"", nam, val);
//                    }
//                    System.out.println(">");
//                }
//                --indent;
//            }
        }
//        ++indent;
        
        
        is.close();
    }

    private String indent(int units) {
        StringBuilder sb = new StringBuilder();
        for (int inx = 0; inx < units; inx++) {
            sb.append("   ");
        }
        return sb.toString();
    }

    private void write() {
        Element file = new Element("file");
        Document doc = new Document(file);
        file.addAttribute(new Attribute("file","someFile"));
        file.addAttribute(new Attribute("version","m.n"));
        file.addAttribute(new Attribute("date","mm/dd/yyyy_hh:mm:ss"));

        file.appendChild(newRecord(new Data("1", "Fred", "40.00", " ")));
        file.appendChild(newRecord(new Data("12", "Bob", "23.50", "Fred")));
//        file.appendChild(newRecord(new Data("13", "Jenny", "22.75", 
"Bob")));
//        file.appendChild(newRecord(new Data("14", "Bill", "23.00", "Bob")));
//        file.appendChild(newRecord(new Data("15", "Becky", "19.00", 
"Fred")));
//        file.appendChild(newRecord(new Data("15", "Chuck", "20.00", 
"Fred")));

        try {
            FileOutputStream os = new FileOutputStream(xmlFile);
            Serializer ser = new Serializer(os);
            ser.setIndent(4);
            ser.setMaxLength(64);

            ser.write(doc);

            os.close();
        }
        catch (IOException xx) {
            xx.printStackTrace(System.err);
        }
    }

    private Element newRecord(Data data) {
        Element record = new Element(String.format("record%08d", ++recNum));
        Element field = new Element("field");
        field.addAttribute(new Attribute("id", "key"));
        field.appendChild(data.key);
        record.appendChild(field);

        field = new Element("field");
        field.addAttribute(new Attribute("id", "name"));
        field.appendChild(data.name);
        record.appendChild(field);

        field = new Element("field");
        field.addAttribute(new Attribute("id", "rate"));
        field.appendChild(data.rate);
        record.appendChild(field);

        field = new Element("field");
        field.addAttribute(new Attribute("id", "mgr"));
        field.appendChild(data.mgr);
        record.appendChild(field);

        return record;
    }

    public static void main(String[] args) {
        Main m = new Main();
    }

    class Data {
        String key;
        String name;
        String rate;
        String mgr;

        public Data(String key, String name, String rate, String mgr) {
            this.key  = key;
            this.name = name;
            this.rate = rate;
            this.mgr  = mgr;
        }
    }
}