大家好，能帮我看下这个程序是错在哪吗？
不甚感激。。。。。
import java.io.IOException;
import java.net.URL;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class wtllq extends JFrame
{
JPanel contentPane;
BorderLayout borderLayoutAll=new BorderLayout();
JLabel jLabelprompt=new JLabel();
JPanel jPanelMain=new JPanel();
BorderLayout borderLayoutMain=new BorderLayout();
JTextField textFieldURL=new JTextField();
JEditorPane jEditorPane=new JEditorPane();
public wtllq()
{
try
{
Init();
}catch(Exception e){e.printStackTrace();}
}
private void Init() throws Exception
{
contentPane=(JPanel)getContentPane();
contentPane.setLayout(borderLayoutAll);
jPanelMain.setLayout(borderLayoutMain);
jLabelprompt.setText("请输入URL");
textFieldURL.setText("");
textFieldURL.addActionListener(new java.awt.event.ActionListener(){
public void actionPerformed(ActionEvent e){
textFieldURL_actionPerformed(e);
}
});
jEditorPane.setEditable(false);
jEditorPane.addHyperlinkListener(new javax.swing.event.HyperlinkListener(){
public void hyperlinkUpdate(HyperlinkEvent e){
jEditorPane_hyperlinkUpdate(e);
}
});
JScrollPane scrollPane=new JScrollPane();
scrollPane.getViewport().add(jEditorPane);
jPanelMain.add(textFieldURL,"North");
jPanelMain.add(scrollPane,"Center");
contentPane.add(jLabelprompt,"North");
contentPane.add(jPanelMain,"Centre");
enableEvents(AWTEvent.WINDOW_EVENT_MASK);
this.setSize(new Dimension(600,500));
this.setTitle("xpj迷你浏览器");
this.setVisible(true);
}
void textFieldURL_actionPerformed(ActionEvent e){
try{
jEditorPane.setPage(textFieldURL.getText());
}catch(IOException ex){
JOptionPane msg=new JOptionPane();
JOptionPane.showMessageDialog(this,"URL地址不正确:"+textFieldURL.getText(),"输入不正确",0);
}
}
void jEditorPane_hyperlinkUpdate(HyperlinkEvent e)
{
if(e.getEventType()==javax.swing.event.HyperlinkEvent.EventType.ACTIVATED){
try{
URL url=e.getURL();
jEditorPane.setPage(url);
textFieldURL.setText(url.toString());
}catch(IOException io){
JOptionPane msg=new JOptionPane();
JOptionPane.showMessageDialog(this,"打开该链接失败！","输入不正确!",0);
}
}
}
protected void processWindowEvent(WindowEvent e){
super.processWindowEvent(e);
if(e.getID()==WindowEvent.WINDOW_CLOSING){
System.exit(0);
}
}
public static void main(String[] args){
new wtllq();
}
}