Hide JFrame or JWindow from Taskbar

Question

I am working with Java Swing Application. I have used JFrame for Notification window. When my application is running at random interval some notification will be display on right top of screen but when notification window displayed at that time I am seeing that notification detail with title named on my task bar. I want to prevent to display this information on task bar. Any one help me. I have also tried with JWindow but same issue present. I don't want to use as System Try on task bar

Answer 1

You should use JDialog instead of JFrame or JWindow. May the following example help you:

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JDialog;
import javax.swing.Timer;

public class Main {
    public static void main(String[] args) {
        final JDialog dlg = new JDialog();
        dlg.setBounds(100, 100, 200, 100);
        dlg.setUndecorated(true);
        dlg.setVisible(!dlg.isVisible());

        Timer showTimer = new Timer(3000, new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                dlg.setVisible(!dlg.isVisible());
            }
        });
        showTimer.start();
    }
}

[UPDATE] Actually JDialog is for providing a frame as a child for another JFrame or JWindow, so it should not creating any info in taskbar or system tray by default.

The above code provides the below output on screen and there is no iconified info on taskbar or any think in system tray as you can see:

Good Luck.

Answer 2

Try setType(Type.UTILITY);

The drawback is for decorated JFrames it only gives close button. Works better for undecorated JFrames