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import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.File;

public class AddValueToXML {
    public static void main(String[] args) {
        try {
            File xmlFile = new File("example.xml");
            DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
            DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
            Document document = documentBuilder.parse(xmlFile);

            Element root = document.getDocumentElement();

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            Element newElement = document.createElement("newElement");
            newElement.appendChild(document.createTextNode("New Value"));

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            root.appendChild(newElement);

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            TransformerFactory transformerFactory = TransformerFactory.newInstance();
            Transformer transformer = transformerFactory.newTransformer();
            DOMSource source = new DOMSource(document);
            StreamResult result = new StreamResult(xmlFile);
            transformer.transform(source, result);

            System.out.println("Value added successfully to XML file");

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

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