Problem in updating Time

[sparsh khandelwal]

Hello Everybody
i try to display the running time,but it just show the present time and not update the time although i use multi threading in my program.
Program part look likes:-

private void jTextField3MouseMoved(java.awt.event.MouseEvent evt) {                                       

    ChatProgram r1=new ChatProgram();
    t=new Thread(r1);

    
             Calendar calendar = new GregorianCalendar();
    String am_pm;
    int hour = calendar.get(Calendar.HOUR);
    int minute = calendar.get(Calendar.MINUTE);
    int second = calendar.get(Calendar.SECOND);
    if(calendar.get(Calendar.AM_PM) == 0)
      am_pm = "AM";
    else
      am_pm = "PM";
    jTextField3.setText("Time : " + hour + ":"
+ minute + ":" + second + " " + am_pm);
    t.start();

    // TODO add your handling code here

    
}                                      
  public void run(){
      for(int i=0;i<100;i++){
          Calendar calendar = new GregorianCalendar();
    String am_pm;
    int hour = calendar.get(Calendar.HOUR);
    int minute = calendar.get(Calendar.MINUTE);
    int second = calendar.get(Calendar.SECOND);
    if(calendar.get(Calendar.AM_PM) == 0)
      am_pm = "AM";
    else
      am_pm = "PM";
    jTextField3.setText("Time : " + hour + ":"
+ minute + ":" + second + " " + am_pm);
    try{
        Thread.sleep(100);
      }catch(Exception e){}
      }

    }
    

Even when i put the code common to both in run method it not works for me
i.e

private void jTextField3MouseMoved(java.awt.event.MouseEvent evt) {                                       

    ChatProgram r1=new ChatProgram();
    t=new Thread(r1);
    t.start();

    // TODO add your handling code here

    
}                                      
  public void run(){
      for(int i=0;i<100;i++){
          Calendar calendar = new GregorianCalendar();
    String am_pm;
    int hour = calendar.get(Calendar.HOUR);
    int minute = calendar.get(Calendar.MINUTE);
    int second = calendar.get(Calendar.SECOND);
    if(calendar.get(Calendar.AM_PM) == 0)
      am_pm = "AM";
    else
      am_pm = "PM";
    jTextField3.setText("Time : " + hour + ":"
+ minute + ":" + second + " " + am_pm);
    try{
        Thread.sleep(100);
      }catch(Exception e){}
      }

    }
    

Please Help!!!
thanks in advance

[Ralph Cook]

Assuming this is in Swing, you cannot reliably update a Swing GUI from outside the UI thread, no matter how many other threads you use. Perhaps you need to put it into something run by java.awt.EventQueue.invokeLater() ?

http://www.javamex.com/tutorials/threads/invokelater.shtml

rc

[praneeth jayarathna]

Hi try this code fragment,


//import java.util.Date;

Date date=new Date();

String ss=String.valueOf(date);
String d=(ss.split(" ")[5]);
String d1=(ss.split(" ")[2]);
int d2=(date.getMonth()+1);
System.out.println(d+d1+d2);


Praneeth J
(PCJT)

[Greg Brannon]

You might find this discussion useful:

Fred Swartz' Text Clock

I refer to Fred's notes a lot when I need grounding to Java basics.

Edit: My apologies to Mr. Fred Swartz. For some reason, I had the wrong first name stuck in my head.