Multiple Popups when I want one at a time

Question

Hi, I'm writing a gui, and I am having difficulties managing popups. Some of my tasks require a password, so I made a task performer class that prompts for a password and performs the given task with that password. Now the problem is, right after I call the performTask method (which initializes the PasswordPrompt) I create a yes or no JOptionPane dialog. Both the PasswordPrompt and the JOptionPane dialog appear at the same time when I want the JOptionPane to only appear after the PasswordPrompt has been disposed. The task performer adds itself as a listener to the password prompt, which notifies the performer once the password has been submitted.
I'm not going to write out all of my code, but here is the general idea.
public class TaskPerformer {
    public void performTask() {
        // Opens a password prompt that I wrote.
        // The TaskPerformer is passed to the password prompt
    /* When the okay button is pressed in the password prompt
    *  this method is called with the password entered by the user
    public void give password(String password) {
        //The task is actually performed here.
public class MyMain {
    public static void main(String [] args) {
        TaskPerformer tp = new TaskPerformer();
        tp.performTask();
        if(JOptionPane.showConfirmDialog(null, "Would you like mashed Potatoes with your turkey?") {
            System.out.println("yay mashed Potatoes!");
}I'm sure I need to use something like wait() and notify(), but I'm really not familiar with these.

Answer 1

I think you can solve your problem if you choose to use a modal dialog as the container
for your password-entry-panel.
See example below:
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;
public class Test
     public static void main(String[] args)
          final JDialog dlg = new JDialog();
          /* if you set modality to 'false', the JOptionPane will come immediately,
           * when 'true', The JOptionPane will come AFTER you click ok */
          dlg.setModal(true); 
          dlg.getContentPane().add(new JPasswordField(40), BorderLayout.NORTH);
          JButton okButton = new JButton("ok");
          okButton.addActionListener(new ActionListener()
               public void actionPerformed(ActionEvent e)
                    dlg.dispose();
          dlg.getContentPane().add(okButton);
          dlg.pack();
          dlg.setLocationRelativeTo(null);
          dlg.setVisible(true);
          JOptionPane.showMessageDialog(null, "hi there!");
}Hope this helps!