JOptionPane showing outside JFrame with GraphicsDevice

Question

package javaapplication1;

import java.awt.DisplayMode;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;

public class JavaApplication1 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        final JFrame frame = new JFrame();
        frame.setTitle("Frame");
        frame.setSize(800, 600);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        GraphicsDevice device = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();
        device.setFullScreenWindow(frame);
        device.setDisplayMode(new DisplayMode(800, 600, 32, 60));
        frame.setVisible(true);

        JButton btn = new JButton();
        btn.setText("Button");
        JPanel panel = new JPanel();

        panel.add(btn);
        frame.add(panel);

        btn.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(frame, "JOptionPane");
            }
        });
    }
}

When I click the button, the application which is set to full screen will go to taskbar/minimized, so I need to click it first in the taskbar before seeing the JOptionPane that I triggered. What do you think is the problem with this? I'd like it to run smoothly without being minimized or going to taskbar. Looking forward for your answers. Thanks in advance. Or is there any other alternative to this?

Answer 1

JOptionPane.showInternalMessageDialog(frame.getContentPane(), "JOptionPane");