thanks for the update Sam

You recommend calling systray = java.awt.SystemTray.getSystemTray, and then systray.isSupported afterwards to check if the system tray is supported. Unfortunately, if the system tray isn’t supported (for example, I just tried this when running MATLAB remotely over an X Window), the original call to getSystemTray can error.

Instead, you can call java.awt.SystemTray.isSupported. This returns true or false, and doesn’t error in an unsupported environment. Call getSystemTray only if that returns true.

Matlab is obviously not finding your icon in the stated classpath…
If you need assistance debugging your specific program, contact me by email for a short consultancy.

thanks! I get another problem. I have implemented a GUI in Java which contains Icon (ImageIcon). Then I exported the class files in a .jar file which I add to the classpath von Matlab. Unfortunately everything on the GUI appear apart from the icons. Do you know what I am doing wrong?

Regards,
Ange Laure

@Ange – no, there are many other higher-priority items on my plate…

did you already get a way to fix the java exceptions in matlab?

Thanks,
Ange Laure

I’m using your code like this in Matlab r2014a in windows 8.1 First I got a java exception so I used this:

t=java.awt.Toolkit.getDefaultToolkit();
ev=t.getAWTEventListeners()
for i=1:length(ev)
    str=ev(i).getListener().getClass.toString
    if str.indexOf('com.mathworks.mwswing.desk.DTSelectionManager')>=0 || ...
            str.indexOf('javax.swing.plaf.basic.BasicLookAndFeel')>=0
        t.removeAWTEventListener(ev(i))
    end
end

sysTray = java.awt.SystemTray.getSystemTray;
if (sysTray.isSupported)
    myIcon = fullfile(matlabroot,'/toolbox/matlab/icons/matlabicon.gif');
    iconImage = java.awt.Toolkit.getDefaultToolkit.createImage(myIcon);
    trayIcon = java.awt.TrayIcon(iconImage, 'initial tooltip');
    trayIcon.setToolTip('click this icon for applicative context menu');
end

After running this code I have a blank icon near clock without no message and without no icon. What should I do?

wei – you can change the figure icon (not without the JavaFrame), but I’m told this may violate Matlab’s license. I’m really not sure why MathWorks (TMW) chose to limit this pretty harmless customization, but there you have it. In all my posts I try to stay on the good side of the line, so I’m afraid I can’t help you here… If you have a specific need for a customer project, then perhaps if you approach TMW they’ll agree to give you special permission.

@Yair, That’s nice to know. Thank you.