title: Java - How to add a JOptionPane for Yes and No options
body: <p>So, I've read the Java API, but still can't seem to make heads or tails about how to do this. And believe me I have tried. I want an ActionListener to cause a message box with the text 'Do you really want to exit?', with options yes and no which exits the program or not depending on the selected button.</p>
  
  <p>Here's what I have for the ActionListener before I started to break it with the message box:</p>
  
  <pre><code>exitItem.addActionListener(
                  new ActionListener() {
                      public void actionPerformed(ActionEvent arg0) {
                          window.dispose();
                      }
                  }
                  );
  </code></pre>
  
  <p>How can I suitably change it to meet my requirements?</p>