Java/XML/XML UI

XML User Interface

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.FileInputStream;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.helpers.DefaultHandler;
import com.sun.org.apache.xerces.internal.parsers.SAXParser;
public class SimpleApp3 implements ActionListener {
  public static void main(String args[]) {
    JFrame frame = new JFrame("SimpleApp Demo");
    frame.setSize(400, 400);
    frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    new SimpleApp3(frame);
  }
  public SimpleApp3(JFrame frame) {
    frame.getContentPane().setLayout(new BorderLayout());
    XMLComponent xmlComponent = new XMLComponent();
    frame.getContentPane().add("Center", xmlComponent.build("ui.xml"));
    frame.setVisible(true);
  }
  public void actionPerformed(ActionEvent ev) {
    System.out.println("You clicked " + ev.getActionCommand());
  }
}
class XMLComponent extends DefaultHandler {
  private boolean containerActive = false;
  private JPanel primaryContainer = new JPanel();
  private SAXParser parser = new SAXParser();
  public XMLComponent() {
    super();
  }
  public JComponent build(String xmlDocument) {
    parser.setContentHandler(this);
    try {
      parser.parse(new InputSource(new FileInputStream(xmlDocument)));
    } catch (Exception ex) {
      System.out.println(ex);
    }
    return primaryContainer;
  }
  public void startElement(String namespaceURI, String name, String qName, Attributes atts) {
    if (name.equals("button"))
      primaryContainer.add(new JButton(atts.getValue("label")));
  }
}
// ui.xml
/*
 * <?xml version="1.0"?> <ui> <button label="XML"/> <button label="is"/> <button
 * label="great"/> </ui>
 * 
 * 
 */