How to implement data extraction in Java using XPath visualization?

To visualize reading data using XPath in Java, you can follow these steps:

1. Firstly import the necessary dependencies, such as using JAXB and DOM parser to parse XML data.
2. Create an XPath expression to locate specific data in an XML document.
3. Load an XML document using JAXB and DOM parsers, then write code to execute XPath expressions and retrieve data.
4. Visualize the obtained data using GUI libraries like Swing or JavaFX.

Below is a simple example code showcasing how to implement visual data reading using XPath in Java.

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathFactory;

import org.w3c.dom.Document;
import org.w3c.dom.NodeList;

public class XPathDemo {
    public static void main(String[] args) {
        try {
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            Document doc = builder.parse("data.xml");

            XPathFactory xpathFactory = XPathFactory.newInstance();
            XPath xpath = xpathFactory.newXPath();

            XPathExpression expr = xpath.compile("//book/title");
            NodeList nodeList = (NodeList) expr.evaluate(doc, XPathConstants.NODESET);

            for (int i = 0; i < nodeList.getLength(); i++) {
                System.out.println(nodeList.item(i).getTextContent());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

In the example above, we used the XPath expression //book/title to retrieve data from all