Question regarding URL (extremely urgent)

Question

I have this:
try{
   url = new URL(getDocumentBase() + "App.htm");
catch(Exception ex){
   System.out.println("No such page");
getAppletContext().showDocument(url, "_blank");This code is what my action listener for a button does.
The problem is that when I click the button, a page is opened with url:
(the document base)\AotA.htmApp.htm
note: AtoA.htm is where my applet is embeeded.
I wonder why this still includes the AtoA.htm in the new URL.
thanks

Answer 1

here's the whole of my code:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.net.*;
public class AtoA extends JApplet implements ActionListener{
     JPanel panel;
     JButton button;
     URL url;
     public void init(){
          new AtoA();
     public AtoA(){
          panel = new JPanel();
          getContentPane().add(panel);
          GridBagLayout g = new GridBagLayout();
          GridBagConstraints c = new GridBagConstraints();
          panel.setLayout(g);
          button = new JButton("Button");
          button.addActionListener(this);
          c.anchor = GridBagConstraints.CENTER;
          c.gridx = 0;
          c.gridy = 0;
          g.setConstraints(button, c);
          panel.add(button);
     public void actionPerformed(ActionEvent e){
          if(e.getSource() == button){
               try{
                    url = new URL(getDocumentBase() + "App.htm");
               catch(Exception ex){
                    System.out.println("No such page");
               getAppletContext().showDocument(url, "_blank");
}... just in case you wanna check it out.
thanks for sparing me some of your time.