How to get programmatically JOptionPane message content

Question

My application is integrated with 3rd party standalone application which will open JOptionPane dialog boxes in separate thread and I am running the thread to close all the opened dialog boxes.So before closing I need to get the message written on dialog box.

My sample main program with which I am trying to achieve:

   public static void main(String[] args)throws Exception{
    ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(1);
    executor.scheduleAtFixedRate(() -> {
        Window[] possibleWindow = Window.getWindows();
        if (possibleWindow != null && possibleWindow.length > 0) {
            System.out.println("Found " + possibleWindow.length + "Window(s) " + possibleWindow[0].getClass().getSuperclass());
            for (int i = possibleWindow.length - 1; i >= 0; i--) {
                try {
                    Window window = possibleWindow[i];
                    //here where I need to get the dialog box message before closing it.
                    window.dispose();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }, 1, 1, TimeUnit.SECONDS);

    JOptionPane.showMessageDialog(null, "test !!!!");
}

Answer 1

If I get your question correctly, you crate JOptionPane objects and give them a message; and later on, you want to know the message you gave to them?

If so, a simple solution would be to create a central map, like Map<JOptionPane, String> . Each time you create a new JOptionPane, you remember it (and its message); and upon cleanup; you simply fetch the messages for those JOptionPane objects that are still up.

Answer 2

You need recursively all components of window. This solution will work in your case :

public static String getMess(Container w){              
    for (Component component : w.getComponents()) {
        if (component instanceof JLabel) {
            return ((JLabel) component).getText();
        }
        else if (component instanceof JTextField){
            return ((JTextField) component).getText();
        }
        else if (component instanceof Container){
            String s = getMess((Container) component);
            if (!s.isEmpty()){
                return s;
            }
        }
    }
    return "";
}

Answer 3

This solution worked for me :

   if (window instanceof JDialog) {
        System.out.println("text : " + ((JOptionPane)((JDialog) window).getContentPane().getComponents()[0]).getMessage());
    }