Question on JFrame, help me plzzzzzzz!!!

Question

Hi my friend:
I need your help on JFrame urgently. As we know, we close a JFrame by clicking the close button on the window title pane. Now I want to change this default for my JFrame. So that when someone click the close button, an Joptionpane is pop out to confirm the closing action. The JFrame will only be closed by clicking the "OK" button on the Joptionpane. If click cancel, optionpane disappear. How to do this? Pls guide me.

Answer 1

close a JFrame by clicking the close button on the
window title pane. Now I want to change this default
for my JFrame. 1) http://java.sun.com/j2se/1.3/docs/api/javax/swing/JFrame.html#setDefaultCloseOperation(int)
So that when someone click the close
button, an Joptionpane is pop out to confirm the
closing action. The JFrame will only be closed by
clicking the "OK" button on the Joptionpane. If click
cancel, optionpane disappear.2)
if(JOptionPane.showConfirmDialog(JFrame.this,"Really close?","Confirm Window Closing", JOptionPane.YES_NO_CANCEL_OPTION)==?){
//do something...
}the ? means you can figure it out yourself with the documentation...
http://java.sun.com/j2se/1.3/docs/api/javax/swing/JOptionPane.html