Скачать или смотреть How to Fix Your JavaFX Window Icon Not Changing Issue

Discover how to resolve the common issue of a `JavaFX` window icon not changing with this simple guide. Transform your application’s appearance effortlessly!
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This video is based on the question https://stackoverflow.com/q/71593922/ asked by the user 'GaussGun' ( https://stackoverflow.com/u/16775319/ ) and on the answer https://stackoverflow.com/a/71607252/ provided by the user 'GaussGun' ( https://stackoverflow.com/u/16775319/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Fixing the JavaFX Window Icon Not Changing Issue

If you are working with JavaFX and have run into the common problem where the window icon fails to change, you are not alone. Many developers encounter this issue when trying to customize the icon for their JavaFX applications. Below, we'll explore the problem and provide a clear solution to ensure your window icon appears as intended.

The Problem

You might have attempted to change the JavaFX window icon using the following code snippet:

[[See Video to Reveal this Text or Code Snippet]]

However, despite your efforts, you find that nothing changes. The window still displays the default icon both in the top left corner and in the taskbar. Here are some key points to consider regarding this problem:

No exceptions are thrown during runtime.

The image file exists, and various formats have been attempted, including .png, .ico, and .jpg.

You have tried different sizes for the images: 16x16, 32x32, 64x64, and even 256x256.

Potential Causes

What could lead to the icon not updating? Here are a few possibilities:

Incorrect file path or location of the image file.

The image resource isn't being correctly accessed due to folder structure.

Issues with image compatibility.

The Solution

Using ResourceStream

After some troubleshooting, a straightforward solution emerged, which involved using ResourceStream. It's essential to place your image in the correct directory format for it to be effectively loaded by your application. Here’s how to make it work:

Image Placement: Move your icon image file (window_icon.png) into the /src/main/resources/{packagename} folder of your project. This is a crucial step because JavaFX applications often depend on resources packed within the application.

Update Your Code: Modify your icon loading code to use the getResourceAsStream method, as shown below:

[[See Video to Reveal this Text or Code Snippet]]

Why This Works

Using getClass().getResourceAsStream(...) ensures that you are correctly accessing resources within your application. By placing the image in the /resources directory and using the relative path to access it, you eliminate file path issues and increase compatibility with the JavaFX framework.

Conclusion

Customizing your JavaFX application’s window icon is achievable with the right approach. By ensuring that your image file is correctly placed within the project structure and accessed using ResourceStream, you can overcome the limitations that may be preventing your icon from displaying. With these tips, you can enhance the appearance of your application and provide a more polished experience for your users.

By following this guide, you should now be able to successfully change the window icon in your JavaFX applications. Happy coding!