Hello I have been working on this program, that parses an XML document and then displays the information in an applet. It keeps giving me the error:

java.lang.InstantiationException: DOMApplet
        at java.lang.Class.newInstance0(Class.java:293)
        at java.lang.Class.newInstance(Class.java:261)
        at sun.applet.AppletPanel.createApplet(AppletPanel.ja va:617)
        at sun.applet.AppletPanel.runLoader(AppletPanel.java: 546)
        at sun.applet.AppletPanel.run(AppletPanel.java:298)
        at java.lang.Thread.run(Thread.java:534)
load: DOMApplet.class can't be instantiated.

I looked it up and i think that it is because i have an abstract class. I have no idea how to fix it, if any one could help i would appreciate it. Here is the code that i have been working on. I have not finished the display part yet because i want to get it to parse the document first.


import javax.xml.parsers.*;
import org.w3c.dom.*;
import java.io.*;
import java.applet.Applet;
import java.awt.Graphics;

public class DOMApplet extends java.applet.Applet {


    StringBuffer buffer;

    /** Initialization method that will be called after the applet is loaded
     * into the browser.
     */
    public void init() {

    }

    public void start() {

        try {
            //tells the program to create an new parser and parse the document

            DOMApplet da = new DOMApplet("C:\\Documents and Settings\\jason.silvers\\My Documents\\DOMTest3\\Newproductlist2.xml");

            }
        catch (Exception ex) {

            System.out.println (ex.getMessage());

      }

    }

    public DOMApplet(String uri) {


        try {

            //builds the factory to parse the file
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            factory.setValidating(false);
            DocumentBuilder builder = factory.newDocumentBuilder();


            //the file is parsed and saved to memory
            Document doc = builder.parse(uri);
            //retrives the document and gets it ready to be displayed
            displayTree(doc.getDocumentElement());
            // System.out.println(doc.getDocumentElement());
   }

        catch (Exception ex) {

            System.out.println (ex.getMessage());

        }
      }

    public void displayTree(Node node) {
            short nodeType = node.getNodeType();
            switch (nodeType) {
                case Node.ELEMENT_NODE:
                    printElement((Element)node);
                    break;
                case Node.ATTRIBUTE_NODE:
                    printElement((Element)node);
                    break;
                case Node.TEXT_NODE:
                    printText((Text)node);
                default:
            }

        }
    protected void printElement(Element node) {
        //code to format elements for display
    }

    protected void printText(CharacterData node) {
       //code to display XML
    }
}