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Comments on Setting icon with javaFX does not show in task list
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Setting icon with javaFX does not show in task list
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I try to set an icon (*.png) with javaFX, but it does not show in the task bar, instead I see the default icon (white cogwheel on light gray background).
Here is my code:
package application;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
// copied and adapted from https://codemia.io/knowledge-hub/path/javafx_application_icon
//
// java -version
// openjdk version "21.0.8" 2025-07-15
// OpenJDK Runtime Environment (build 21.0.8+9-Ubuntu-0ubuntu124.04.1)
// OpenJDK 64-Bit Server VM (build 21.0.8+9-Ubuntu-0ubuntu124.04.1, mixed mode, sharing)
//
// lsb_release -a
// No LSB modules are available.
// Distributor ID: Ubuntu
// Description: Ubuntu 24.04.3 LTS
// Release: 24.04
// Codename: noble
public class IconTest extends Application {
// manually checked that the file can be displayed and the image has 48x48 pixels
String pathname = "/home/watchmaker/playground/I48.png";
@Override
public void start(Stage stage) throws FileNotFoundException {
// Create a layout
StackPane root = new StackPane();
Scene scene = new Scene(root, 400, 300);
File ifi = new File(pathname);
// just in case something's wrong at runtime
System.out.println("File=" + ifi.getAbsolutePath() + " is readable=" + ifi.canRead());
Image icon = new Image(new FileInputStream(ifi));
stage.getIcons().add(icon);
stage.setTitle("Try and cry");
stage.setScene(scene);
stage.show();
}
public static void main(String[] args) {
launch(args);
}
}
What is wrong?
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