我是JAVA新手,书上的一段代码如下,本人如实抄下,但是运行后JEditorPane一直是空白,哪里有页面呀?
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
import javax.swing.JEditorPane;
public class Browse
{ public static void main(String a[])
{ new Win();}
}
class Win extends Frame
implements ActionListener,Runnable
{ Button button;
URL url;
TextField text;
JEditorPane editPane;
byte b[]=new byte[118];
Thread thread;
public Win()
{ text=new TextField(20);
editPane=new JEditorPane();
editPane.setEditable(false);
button=new Button("确定");
button.addActionListener(this);
thread=new Thread(this);
Panel p=new Panel();
p.add(new Label("输入网址:"));
p.add(text);
p.add(button);
ScrollPane s=new ScrollPane();
s.add(editPane);
add(s,BorderLayout.CENTER);
add(p,BorderLayout.NORTH);
setBounds(160,60,360,300);
setVisible(true);
validate();
addWindowListener(new WindowAdapter()
{ public void windowClosing(WindowEvent e)
{ System.exit(0);}
});
}
public void actionPerformed(ActionEvent e)
{ if(!(thread.isAlive()))
thread=new Thread();
try{ thread.start();}
catch(Exception ee){
text.setText("我正在读取"+url);
}
}
public void run(){
try{ editPane.setText(null);
url=new URL(text.getText().trim());
editPane.setPage(url);
}
catch(Exception el){
text.setText(" "+el);
return;
}
}
}
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
import javax.swing.JEditorPane;
public class Browse
{ public static void main(String a[])
{ new Win();}
}
class Win extends Frame
implements ActionListener,Runnable
{ Button button;
URL url;
TextField text;
JEditorPane editPane;
byte b[]=new byte[118];
Thread thread;
public Win()
{ text=new TextField(20);
editPane=new JEditorPane();
editPane.setEditable(false);
button=new Button("确定");
button.addActionListener(this);
thread=new Thread(this);
Panel p=new Panel();
p.add(new Label("输入网址:"));
p.add(text);
p.add(button);
ScrollPane s=new ScrollPane();
s.add(editPane);
add(s,BorderLayout.CENTER);
add(p,BorderLayout.NORTH);
setBounds(160,60,360,300);
setVisible(true);
validate();
addWindowListener(new WindowAdapter()
{ public void windowClosing(WindowEvent e)
{ System.exit(0);}
});
}
public void actionPerformed(ActionEvent e)
{ if(!(thread.isAlive()))
thread=new Thread();
try{ thread.start();}
catch(Exception ee){
text.setText("我正在读取"+url);
}
}
public void run(){
try{ editPane.setText(null);
url=new URL(text.getText().trim());
editPane.setPage(url);
}
catch(Exception el){
text.setText(" "+el);
return;
}
}
}
解决方案 »
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