Showing "JOptionPane.showMessageDialog" without stopping flow of execution

java multithreading dialog jframe execution
Brandon picture Brandon · Mar 26, 2011 · Viewed 17.4k times · Source

I'm currently working on a project that's getting more complex than I thought it would be originally. What I'm aiming to do right now is show a message dialog without halting the execution of the main thread in the program. Right now, I'm using:

JOptionPane.showMessageDialog(null, message, "Received Message", JOptionPane.INFORMATION_MESSAGE);

But this pauses everything else in the main thread so it won't show multiple dialogs at a time, just on after the other. Could this m=be as simple as creating a new JFrame instead of using the JOptionPane?

Answer

Vincent Ramdhanie picture Vincent Ramdhanie · Mar 26, 2011

According to the docs:

JOptionPane creates JDialogs that are modal. To create a non-modal Dialog, you must use the JDialog class directly.

The link above shows some examples of creating dialog boxes.

One other option is to start the JOptionPane in its own thread something like this:

  Thread t = new Thread(new Runnable(){
        public void run(){
            JOptionPane.showMessageDialog(null, "Hello");
        }
    });
  t.start();

That way the main thread of your program continues even though the modal dialog is up.

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