Change System tray Icon in java

Question

I just want to change the system tray Icon image for my application. I did 2 things -

Just changed the URL in the default program -

final TrayIcon trayIcon = new TrayIcon(createImage("images/Graph.png", "tray icon"));

Second try -

Image img = Toolkit.getDefaultToolkit().getImage("images/Graph.png");
final TrayIcon trayIcon = new TrayIcon(img, "Application Name", popup);

The application launches in both cases but no image is shown. Its a blank placeholder. What am i doing wrong ?

Answer 1

images/Graph.png is not a valid URL for an image located in your jar. Hence, I guess that img is null on your second try.

I suggest you this way :

//Get the URL with method class.getResource("/path/to/image.png")
URL url = System.class.getResource("/images/Graph.png");

//Use it to get the image
Image img = Toolkit.getDefaultToolkit().getImage(url);

final TrayIcon trayIcon = new TrayIcon(img, "Application Name", popup);

You shall also ensure that images/ is in your classpath.