import javax.swing.*;
import java.awt.*;
import javax.swing.JApplet;
import java.awt.Graphics;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.net.URL;
import java.net.MalformedURLException;
 
public class OpenLocalPage extends JApplet
{
    Container pane;
    public void init()
    {
        pane = getContentPane();
        JButton button = new JButton( "Browse Somewhere!" );
 
        button.addActionListener( new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                URL url = null;
                try
                {
                    url = new URL( "file:///D|/reference/Java%201.3%20Docs/api/index.html" );
                }
                catch( MalformedURLException mfue )
                {
                    // TODO: Handle this exception appropriately!
                }
                if(url != null)
                    getAppletContext().showDocument(url);
            }
        } );
        pane.add( button );
    }
}

getDocumentBase

public URL getDocumentBase()

Returns an absolute URL naming the directory of the document in which the applet is embedded. For example, suppose an applet is contained within the document: 

    http://java.sun.com/products/jdk/1.2/index.html


The document base is:

    http://java.sun.com/products/jdk/1.2/

getContent

public final Object getContent()
                        throws IOException

Gets the contents of this URL. This method is a shorthand for:

     openConnection().getContent()


Returns:
the contents of this URL.
Throws:
IOException - if an I/O exception occurs.
See Also:
URLConnection.getContent()

getFile

public String getFile()

Gets the file name of this URL.


Returns:
the file name of this URL, or an empty string if one does not exist