程序问问：applet浏览指定URL

import java.net.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import java.applet.AppletContext;
import javax.swing.*;
import javax.swing.event.*;

public class ShowDocument extends JApplet{
    public void init()
    {
        JButton goButton =new JButton("Link to www.sohu.com");
        Container myContainer=getContentPane();
        myContainer.add(new JLabel("Link to SOHU"),BorderLayout.NORTH);
        myContainer.add(goButton,BorderLayout.SOUTH);
        goButton.addActionListener(new ButtonListener());   
    }
    class ButtonListener implements ActionListener
    {
        public void actionPerformed(ActionEvent e)
        {
            try
            {
                URL newDocument=new URL("http://www.sohu.com");
                AppletContext browser=getAppletContext();
                browser.showDocument(newDocument);
               
            }
            catch(Exception URLException)
            {}
        }
    }

}

这个程序的作用是什么？不是可以从链接打开搜狐网站吗？我点击Link to www.sohu.com链接是，怎么弹不出该网页呀？
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帮帮忙吧，各位大虾.
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...................服了
你这个APPLET又没有浏览器调用，怎么可能会显示页面啊
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