How to prompt a confirmation dialog box in the middle of non event dispatching thread

Question

I have the following fun which will be executed by non event dispatching thread. In the middle of thread, I want a

1. A confirmation box pop up. Thre

Answer 1

May be I do not understand the question, but I do not get the answers either... if you want the calling thread to block on the call to fun(), why display the JOptionPane in a new (parallel) Thread? Shouldn't this be sufficient?

public int fun() {
    return JOptionPane.showConfirmDialog(null, message, title, JOptionPane.YES_NO_OPTION);
} 

PS How do you define a non event dispatching thread?