How can I open and diplay the inhalt of xml-file on a Jpanel

Question

It sounds very simple to do that. I've already read the Xml-tutorial. But I still don't know, how can I do it?what is the best and simple way to do that? Any advice would be greatly appreciated! Please write some code for me, if possible. so that I can grasp it ASAP!

Answer 1

* Display_XML.java
import java.awt.*;
import java.io.*;
import javax.swing.*;
import javax.xml.parsers.*;
import org.w3c.dom.*;
public class Display_XML extends JFrame {
    public Display_XML() {
        initComponents();
        readXML();
    private void initComponents() {
        textScroller = new JScrollPane();
        textarea = new JTextArea();
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setTitle("Alimentation:  product list");
        textarea.setEditable(false);
        textarea.setBackground(new Color(254,254,204));
        textScroller.setViewportView(textarea);
        getContentPane().add(textScroller, BorderLayout.CENTER);
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        setBounds((screenSize.width-400)/2, (screenSize.height-300)/2, 400, 300);
This example reads this XML data file [Alimentaion_Test_File.xml]
<?xml version="1.0" encoding="ISO-8859-1"?>
<Alimentation>
     <Product>
          <Name>Milk</Name>
          <Price>1.50</Price>
     </Product>
     <Product>
          <Name>Cheese</Name>
          <Price>2.10</Price>
     </Product>
     <Product>
          <Name>Butter</Name>
          <Price>1.90</Price>
     </Product>
     <Product>
          <Name>Cream</Name>
          <Price>1.96</Price>
     </Product>
</Alimentation>
    private void readXML() {
        File file = new File("Alimentaion_Test_File.xml");
        try {
            DocumentBuilder builder =
                    DocumentBuilderFactory.newInstance().newDocumentBuilder();
            Document doc = builder.parse(file);
            NodeList nodes = doc.getElementsByTagName("Product");
            for (int i = 0; i < nodes.getLength(); i++) {
                Element element = (Element) nodes.item(i);
                NodeList title = element.getElementsByTagName("Name");
                Element line = (Element) title.item(0);
                textarea.append("Name: " + getCharacterDataFromElement(line)+"\n");
                NodeList url = element.getElementsByTagName("Price");
                line = (Element) url.item(0);
                textarea.append("   Price: " + getCharacterDataFromElement(line)+"\n");
        } catch (Exception e) {
            e.printStackTrace();
    public static String getCharacterDataFromElement(Element e) {
        Node child = e.getFirstChild();
        if (child instanceof CharacterData) {
            CharacterData cd = (CharacterData) child;
            return cd.getData();
        return "?";
    public static void main(String args[]) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Display_XML().setVisible(true);
    private JScrollPane textScroller;
    private JTextArea textarea;
}