Wait() statement causing blank JOptionPane -

Question

Hi All ,
I got a unique problem . I m trying to explain the problem in brief .
Description :
In my code i have one Wait() statement and just after that one statement to display JOptionPane.
code snippet (1):
private synchronized void startEucClient() {
if(securityToken == null) {
try{
wait(60000);
     if(securityToken==null) {
JOptionPane.showMessageDialog(w, "No
Response from the server\nEUC timed
Out.", "Error",
JOptionPane.ERROR_MESSAGE);
Now what happens that once this wait() starts , another
method is called where also on some validation i am
displaying one JOptionPane .
/// code snippet (2)
private void methodWhileWait()
if(some_validation)
System.out.println(" Hello I M Here");
JOptionPane.showMessageDialog(w,
"Some problem with Login", "Error",
JOptionPane.ERROR_MESSAGE);
NOW THE PROBLEM IS :
after wait() starts , methodWhileWait() is called and
if{} conditions is satisfied and it also displays
" Hello I M Here"
BUT then JoptionPane gets displayed without displaying the message ( "Some problem with Login")
..so it is BLANK , and message comes on it only when
Wait() is over .
I m not able to understand. HOW TO HANDLE it.
it should display the message then and there
and NOT the blank-JOptionPane (till wait ends)
....WHEN i remove wait() statement then i dont get
blank JOPtionPane but it displays message . BUT i need wait() also.
NEED suggestions on this :
1.IS IT THE PROBLEM of repaint() , how to avoid this ?
2. can it be done with the concept of Thread
, then HOW?
PLEASE HELP.
thanx n regds,
Raj

Answer 1

Try using the invokeLate() method from SwingUtilities class.
For instance:
SwingUtilities.invokeLater(new Runnable(){
    public void run(){
        JOptionPane.showMessageDialog(w, "No Response from the server\nEUC timed Out.", "Error", JOptionPane.ERROR_MESSAGE);
});Also one problem might be if the wait() method runs in the event dispatcher thread. If this is the case then this thread (which manages the GUI) is not able to display any new components until wait() has returned.