Disple html using JEditorPane

Question

I want display html file using JEditorPane
but I become an exception
java.net.MalformedURLException: unknown protocol: e
what schould be the problem
       import javax.swing.*;
       import java.net.URL;
       import java.io.File;
public class Browser extends JFrame
      JEditorPane  ePane = new JEditorPane();
      public Browser(){
          this.setBounds(200,50,700,650);
          this.setLayout(null);
          ePane.setBounds(50,20, 600,500);
          try {
                   File file = new File("xx.html");
                   String ss = file.getAbsolutePath();
                 URL url = new URL(ss);
                 ePane.setPage(url);
             } catch (java.io.IOException ex) { ex.printStackTrace(); }
          this.add(ePane);
}  

Answer 1

               File file = new File("xx.html");"xx.html" lacks a protocol, like "http" or "ftp". But anyway, why not just use File.toURL()?