例11-3.txt

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import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
import javax.swing.event.*;
public class Example11_3{
    public static void main(String args[]){
        new WinTwo ();
    }
}
class WinTwo extends JFrame implements ActionListener,Runnable{
    JButton button;
    URL url;
    JTextField text;
    JEditorPane editPane; 
    byte b[]=new byte[118];
    Thread thread;
    public WinTwo (){
        text=new JTextField(20);
        editPane=new JEditorPane();
        editPane.setEditable(false);
        button=new JButton("确定");
        button.addActionListener(this);
        thread=new Thread(this);
        JPanel p=new JPanel();
        p.add(new JLabel("输入网址:"));
        p.add(text); 
        p.add(button);
        Container con=getContentPane();
        con.add(new JScrollPane(editPane),BorderLayout.CENTER);
        con.add(p,BorderLayout.NORTH);
        setBounds(60,60,360,300);
        setVisible(true);
        validate();
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        editPane.addHyperlinkListener(new HyperlinkListener(){
                         public void hyperlinkUpdate(HyperlinkEvent e){
                            if(e.getEventType()==HyperlinkEvent.EventType.ACTIVATED){
                                try{   editPane.setPage(e.getURL());
                                }     
                                catch(IOException e1){
                                       editPane.setText(""+e1);
                                }
                            }
                         }});
    }
    public void actionPerformed(ActionEvent e){
        if(!(thread.isAlive())) 
           thread=new Thread(this);
        try{   thread.start();
        }
        catch(Exception ee){
              text.setText("我正在读取"+url);
        }
    }
    public void run(){
        try {   int n=-1;
               editPane.setText(null);
               url=new URL(text.getText().trim());
               editPane.setPage(url);
        }
        catch(MalformedURLException e1){
               text.setText(""+e1);
               return;
        }
        catch(IOException e1){
               text.setText(""+e1);
               return;
        }  
    }
}