Set Icon on Stage in JavaFX

Question

I wanted to know how should I set icons on javaFX stage. I have found this method, but it did not work properly.

  stage.getIcons().add(new Image(iconImagePath));

stage is an instance of javafx.stage.Stage, and I have imported javafx.scene.image.Image. This is the exception which we receive:

Invalid URL: Invalid URL or resource not found

Also, there is nothing wrong with the iconImagePath, its value is "G:/test.jpg" and there is a jpg file in the G drive named test. In addition, when we use ImageIO to read the same URL we can do it easily.

Solution 1

stage.getIcons().add(new Image(getClass().getResourceAsStream("bal.png")));

This example works. I placed an icon in the same folder/package as the source .java file.

Directory structure

Solution 2

The constructors of javafx.scene.image.Image expect a URI, not a (full) path. This URI can either be relative (e.g. /images/flower.png) or absolute (e.g. file:flower.png).

Strings like G:/test.jpg are no valid URLs and hence illegal.

Try file:g:/test.jpg instead.

Usually, the icons should be bundled with your application, so simply put the image file into your classpath (e.g. if you're using eclipse, put it into your 'src' directory) and use it like that:

stage.getIcons().add(new Image("/logo.jpg"));

Solution 3

use

stage.getIcons().add(new Image(("file:logo.png")));

and put the image logo.png in root of your project ( at same directory where src )

Solution 4

Best Way:

stage.getIcons().add(new Image(getClass().getResource(IconImagePath).toExternalForm()));

Solution 5

don't forget that your icon must be in 32x32 or 16x16 resolution, if not, it doesn't work.

View more solutions

Comments

[mavroprovato]

G:/test.jpg is not a URL, what if you try with file:/G:/test.jpg?

[Michael Berry]

Related: stackoverflow.com/questions/10121991/javafx-2-application-ic‌​on/…

[Siavash]

Thank you very much, using this method no exception will be thrown, but the image icon of stage has not changed!!

[Siavash]

Thank you very much, using this method no exception will be thrown, but the image icon of stage has not changed!!

[Siavash]

Thank you very much, using this method no exception will be thrown, but the image icon of stage has not changed!!

[Siavash]

Thank you again, but it does not work with this path: file:images/pic.jpeg

[Maher Abuthraa]

try to clean project and build it again not only run.

[subash]

if you use getResourceAsStream("") no need to file: . it is just a protocal. so remove the file: if you are using getResourceAsStream

[Siavash]

Did as you said, but I receive this exception: Exception in thread "JavaFX Application Thread" java.lang.NullPointerException: Input stream must not be null

[isnot2bad]

It you don't get any exception, it means that the image could be found and loaded. You should see it in the trimming area of your window, the windows task bar and the task list if you press Alt+Tab.

[Siavash]

It was jpeg, I changed it to jpg, but it still is not working. What is this list of images on stage (stage.getIcons()), and what happens if someone adds to Image or more to it? I mean

[Siavash]

stage.getIcons().add(new Image(getClass().getResourceAsStream("bal.png"))); stage.getIcons().add(new Image(getClass().getResourceAsStream("bal2.png")));

[subash]

look my answer. upload my directory structure. where .java file located there your image file locate.

[Jitendra Pareek]

Yes Subash Your answer is correct its working fine. May be Siavash have some version specific problem or he has not clean and build project. I am agreed its working.

[Siavash]

I am using Java 8 on eclipse Kepler.

[Siavash]

Thank you in advance, I checked your solution and it worked, but I do not want to put my image file next to my .java files.

[subash]

then where you want to put??

[Siavash]

Because I have a lot of images, I have created a folder named images in the root of the project next to src and bin folders.

[Siavash]

But it does not work!!! when I change the String "temp.jpeg" to "images/temp.jpeg" I get a null pointer exception which says inputstream must not be null.

[subash]

can you post your directory structure..?

[ferrerverck]

Actually it should work, but it doesn't for me. I am running Ubuntu and got the same issue with Swing. I think it is somehow connected to the application icon cache. And I still don't know how to fix it. Clean and Build doesn't help.

[APC]

This is a little terse. Please explain why this solution is the "best way", especially when there are so many other answers posted already.

[manikant gautam]

I thought it would be helpful by the help of example.Instead of putting a single line code.