Showing “JOptionPane.showMessageDialog” without stopping flow of execution

问题

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?

回答1:

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.

回答2:

You could just start a separate Runnable to display the dialog and handle the response.

回答3:

try this one:

  EventQueue.invokeLater(new Runnable(){
                        @Override
                        public void run() {
                     JOptionPane op = new JOptionPane("Hi..",JOptionPane.INFORMATION_MESSAGE);
                     JDialog dialog = op.createDialog("Break");
                     dialog.setAlwaysOnTop(true);
                     dialog.setModal(true);
                     dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);      
                     dialog.setVisible(true);
                        }
                    });

来源：https://stackoverflow.com/questions/5440226/showing-joptionpane-showmessagedialog-without-stopping-flow-of-execution