java jdialog taskbar button

Question

i'm traying a jdialog on linux, but it still appears in my taskbar. this is the code? what's wrong?

import javax.swing.JDialog;

public class Main {
    public static void main(String [] args) {
        new mydialog();
    }

    private static class mydialog extends JDialog {
        public mydialog() {
            super();
            setSize(200,200);
            setLocationByPlatform(true);
            setAlwaysOnTop(false);
            setUndecorated(true);
            setVisible(true);
        }
    }
}

Answer 1

Since this still seems to be an issue in Linux environments I'd like to share my solution for this topic:

I simply had to create the JDialog with an parent Frame/Window like "new JDialog(new JFrame());" and after setting the JDialog to be Visible I call "jframe.revalidate();". Thats it. Looks like Java has a problem communicating correctly with the DisplayManager while initialising the JDialog..

Works for me with Java 1.8.0.45, Linux Mint 17.1, Cinnamon 2.4.8

Answer 2

Been struggling with this one for some time now. What finally worked for me:

JDialog frame = new JDialog();
frame.setType(javax.swing.JFrame.Type.POPUP);

Alternatively you can try set the type to UTILITY.

Lubuntu 15.04 (LXDE) running Java 1.8.0_25

Answer 3

try replacing setLocationByPlatform(true); with setLocation(10, 10);

Answer 4

You need to use JWindow if you don't want it to appear in the taskbar.
See also: how-do-i-prevent-jdialog-from-showing-in-gnome-panellinux

Answer 5

the only solution I found is to switch from Swing interfaces to gtk interfaces, to do this I used java-gnome . the only problem is that you must change all components of the swing classes to the corresponding gtk classes.