Corba + Java 的问题（很郁闷的说！）

Question

继续，程序：
CORBAClockClient.java:  
 
import  java.awt.*;  
import  java.awt.event.*;  
import  javax.swing.*;  
import  CLOCKSYS.*;  
import  org.omg.CosNaming.*;  
import  org.omg.CORBA.*;  
 
public  class  CORBAClockClient  extends  JFrame  implements  Runnable  {  
           private  JButton  exitButton  =  new  JButton("Exit");  
           private  JButton  timeButton  =  new  JButton("Time");  
           private  JLabel            time  =  new  JLabel("Missing  server  connection");  
           private  JLabel    name  =  new  JLabel();  
           private  JLabel    lt  =  new  JLabel("Time:            ");  
           private  JLabel    ln  =  new  JLabel("Location:    ");  
           private  JLabel    lz  =  new  JLabel("Time  Zone:  ");  
           private  Choice            choice  =  new  Choice();  
           private  Container  pane  =  getContentPane();  
           private  Panel  p1  =  new  Panel();  
           private  Panel  p2  =  new  Panel();  
           private  Panel  p3  =  new  Panel();  
           org.omg.CORBA.ORB  orb;  
           org.omg.CORBA.Object  obj;  
           NamingContext  nc;  
           CORBATimeServer  cts;  
           String  timezoneid[],  tz;  
             
           public  CORBAClockClient(String[]  args)  throws  Exception  {  
                       super("CORBA  Clock  System  Client");  
                       orb  =  org.omg.CORBA.ORB.init(args,  null);  
                       obj  =  orb.resolve_initial_references("NameService");  
                       nc  =  NamingContextHelper.narrow(obj);  
                       NameComponent  path[]  =  {new  NameComponent("CLOCKSYS","")};  
                       obj  =  nc.resolve(path);  
                       cts  =  CORBATimeServerHelper.narrow(obj);  
                         
                       p1.setLayout(new  GridLayout(3,1));  
                       p1.add(lt);  
                       p1.add(ln);  
                       p1.add(lz);  
                       p2.setLayout(new  GridLayout(3,1));  
                       p2.add(time);  
                       p2.add(name);  
                       p2.add(choice);  
                       p3.setLayout(new  GridLayout(1,2));  
                       p3.add(timeButton);  
                       p3.add(exitButton);  
                       pane.setLayout(new  FlowLayout());  
                       pane.add(p1);  
                       pane.add(p2);  
                       pane.add(p3);  
                         
                       timeButton.addActionListener  (new  ActionListener()  {  
                                   public  void  actionPerformed(ActionEvent  event)  {  
                                                 
                                   }  
                       }  
                       );  
                         
                       timezoneid  =  cts.available_ids();  
                       for(int  i=0;  i<timezoneid.length;  i++)  {  
                                   choice.addItem(timezoneid[i]);  
                       }  
 
                       choice.select("Australia/Sydney");  
                         
                       setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
                       setSize(400,200);  
                       setResizable(false);  
                       setVisible(true);  
                       show();  
           }  
                       public  void  run()  {  
                                   while(true)  {  
                                               tz  =  timezoneid[choice.getSelectedIndex()];  
                                               time.setText(cts.time(tz));  
                                               name.setText(cts.name(tz));  
                                               System.out.println(cts.time(tz));  
                                               try  {  
                                                           Thread.sleep(1000);  
                                               }catch(InterruptedException  ie)  {}  
                                   }  
                       }  
             
           public  static  void  main(String  args[])  throws  Exception  {  
                       CORBAClockClient  cInter  =  new  CORBAClockClient(args);  
                       Thread  thread  =  new  Thread(cInter);  
                       thread.start();  
           }  
}  
-------------------------------------------------------------------------  
Clock_sys.java:  
import  java.util.TimeZone;  
import  java.util.Date;  
import  java.util.Locale;  
import  java.text.DateFormat;  
 
public  class  Clock_sys  {  
           String  time[]  =  new  String[2];  
           Locale  curLocale  =  Locale.US;  
           TimeZone  tz  =  TimeZone.getDefault();  
           DateFormat  df  =  DateFormat.getDateTimeInstance(  
                                                           DateFormat.FULL,  
                                                           DateFormat.FULL,  
                                                           curLocale);  
           Date  curDate  =  new  Date();  
             
           public  Clock_sys()  {  
                         
           }  
             
           public  String  _time(String  tz_id)  {  
                       TimeZone  temp  =  TimeZone.getTimeZone(tz_id);  
                       df.setTimeZone(temp);  
                       return  df.format(curDate);  
           }  
             
           public  String  _name(String  tz_id)  {  
                       TimeZone  tz  =  TimeZone.getTimeZone(tz_id);  
                       Locale  localeTime  =  Locale.US;  
                       return  tz.getDisplayName(localeTime);  
           }  
             
           public  long  _offset(String  tz_id)  {  
                       TimeZone  t  =  TimeZone.getTimeZone(tz_id);  
                       return  t.getRawOffset()/3600000;  
           }  
 
           public  String[]  _ids()  {  
                       return  tz.getAvailableIDs();  
           }  
}