JOptionPane Yes or No window

Question

I am trying to create a message with a Yes or No button. Then a window will appear with a certain message that depends on if the user clicked Yes or No.

Here is m

Answer 1

Code for Yes and No Message

      int n = JOptionPane.showConfirmDialog(  
                null,
                "sample question?!" ,
                "",
                JOptionPane.YES_NO_OPTION);

      if(n == JOptionPane.YES_OPTION)
      {
          JOptionPane.showMessageDialog(null, "Opening...");
      }
      else
      {
          JOptionPane.showMessageDialog(null, "Goodbye");
          System.exit(0);