JOptionPane.showMessageDialog

[mirjam]

Hi!

I need a little help .....

I have a problem with the method showMessageDialog belonging to JOptionPane's class.
I used this method to menage an event (in particular a button event). This is the code I used:

public void actionPerformed(ActionEvent e)
{
if (e.getActionCommand() == "View")
{
String output = "Credits: " + "200" ;

JOptionPane.showMessageDialog(null, output , "Status", JOptionPane.INFORMATION_MESSAGE);

System.exit(0);
}
}

The result is an empty pane with the only button "OK".
Neither the String I passed as parameter nor the icon "I" (because it is an INFORMATION_MESSAGE the icon is just an "I") was displayed....
So I tried to run the exclusive JOptionPane.showMessageDialog code in another new file and it works correctly....

What do I wrong?

Thanks for your support.
Bye!!

[GreatValue]

Did you try to use EventQueue.invokeLate() so that all events can be executed before showing the dialog:

final String output = ...
EventQueue.invokeLater(new Runnable()
{
public void run()
{
JOptionPane.showMessageDialog(...)
}
});

GreatValue

[mirjam]

Hi!
thanks for your reply!

well, I tried to do as you said by copying your code inside my project but unluckely it still doesn't work....

I thought that maybe I wrong the first parameter I pass to the method (which is actually null), but it didn't work also with "this" parameter...

If you'll have some idea let me know, thanks again!
BYE!
mirjam