Set Icon on Stage in JavaFX

问题:

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.

回答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

回答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"));

回答3:

Best Way:

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

回答4:

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 )

回答5:

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

回答6:

// Set the icon
stage.getIcons().add(new Image(getClass().getResourceAsStream("penguin.png")));

I faced the same problem. I used Netbeans. I'm not sure if the folder structure is different for other IDEs, but I had to put the picture in /build/classes/(package that contains the JavaFX class file). This means it doesn't go into the src folder.

回答7:

Here is the working code, which is exactly what you neened:

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

/**
 *
 * @author Manikant gautam
 * This is a beginner's sample application
 * using JAVAFX
 * 
*/

public class Helloworld extends Application {

    @Override
    public void start(Stage primaryStage) {
        Button btn = new Button();
        btn.setText("Say 'Hello World'");
        btn.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                System.out.println("Hello World!");
            }
        });

        StackPane root = new StackPane();
        root.getChildren().add(btn);

        Scene scene = new Scene(root, 300, 250);
        // Set Icon From Here.
        primaryStage.getIcons().add(
            new Image("/resource/graphics/app_logo.png"));
        primaryStage.setTitle("Hello World!");
        primaryStage.setScene(scene);
        primaryStage.show();
    }


    public static void main(String[] args) {
        launch(args);
    }
}

Set Icon by statement:

primaryStage.getIcons().add(new Image("/resource/graphics/app_logo.png"));

回答8:

This is what I've done and it work. The image is located in the root of my resource folder.

stage.getIcons().add(new Image("/ubuntu-mini.png"));

I am using JavaFX 8

回答9:

The solution is:

File f = new File("image.png");
Image ix = new Image(f.toURI().toString());
stage.getIcons().add(ix);

回答10:

public class Main extends Application
{
    private static final Logger LOGGER = Logger.getLogger(Main.class);

    @Override
    public void start(Stage primaryStage)
        {
            try
                {
                    // BorderPane root = new BorderPane();
                    BorderPane root = (BorderPane) FXMLLoader
                            .load(getClass().getResource("/org/geeksynergy/view/layout/FrontPageBorder.fxml"));
                    root.setAccessibleText("good");

                    Scene scene = new Scene(root, 400, 400);
                    scene.getStylesheets().add(getClass()
                            .getResource("/org/geeksynergy/view/cssstyle/application.css").toExternalForm());
                    primaryStage.setScene(scene);
                    primaryStage.setTitle("AiRJuke");
                    primaryStage.getIcons().add(new Image("/org/geeksymergy/resource/images/download.png"));
                    primaryStage.show();
                    AnchorPane personOverview = (AnchorPane) FXMLLoader
                            .load(getClass().getResource("/org/geeksynergy/view/layout/Ui.fxml"));

                    root.setCenter(personOverview);

                    // added this line to save the playlist , when we close
                    // application window
                    Platform.setImplicitExit(false);

                    primaryStage.setOnCloseRequest(new EventHandler<WindowEvent>()
                        {
                            public void handle(WindowEvent event)
                                {
                                    M3UPlayList.defaultSavePlaylist();
                                    Platform.setImplicitExit(true);
                                    primaryStage.hide();
                                }
                        });

                } catch (Exception e)
                {

                    LOGGER.error("Exception while loding application", e);
                }
        }

    public static void main(String[] args)
        {
            launch(args);
        }
}

回答11:

I use netbeans 8.2, if I use : stage.getIcons().addAll(new Image(getClass().getResourceAsStream("home-icon32.png")));

I have to put the image in src directory. Don't know why, but works only this way. I've tried putting it in build/classes, but negative.