JavaFX Mouse coordinates application

JavaFx Events and Event Handling: Exercise-1 with Solution

Write a JavaFX program application that detects and displays mouse coordinates when moved over the application window.

Sample Solution:

JavaFx Code:

//Main.java

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class Main extends Application {

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

    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("Mouse Coordinates Application");

        Label coordinatesLabel = new Label(" Mouse Coordinates: ");
        Label currentCoordinatesLabel = new Label();

        // Create a VBox to arrange the labels
        VBox vbox = new VBox(coordinatesLabel, currentCoordinatesLabel);

        // Create a scene
        Scene scene = new Scene(vbox, 400, 300);

        // Register a mouse moved event handler
        scene.setOnMouseMoved(event -> {
            double x = event.getSceneX();
            double y = event.getSceneY();
            currentCoordinatesLabel.setText(" X: " + x + ",  Y: " + y);
        });

        primaryStage.setScene(scene);
        primaryStage.show();
    }
}

In the exercise above, we create a simple JavaFX application with a 'VBox' layout containing two 'Label' components. The first label, "Mouse Coordinates," is a static label, and the second label, "currentCoordinatesLabel," is used to display the mouse coordinates.

Next we create a scene and register a mouse move event handler for that scene. When the mouse is moved over the window, the event handler updates the 'currentCoordinatesLabel' with the current mouse coordinates.

Sample Output:

Flowchart:

Java Code Editor:

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