JavaFX Mouse click application

JavaFx Events and Event Handling: Exercise-2 with Solution

Write a JavaFX program that listens for mouse clicks and displays a message when the left mouse button is clicked.

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; 
import javafx.scene.layout.StackPane;
import javafx.scene.text.Text;
 

public class Main extends Application {

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

    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("Mouse Click App");

        Label clickLabel = new Label("Mouse Click: ");

        // Create a VBox to arrange the labels
        VBox vbox = new VBox(clickLabel);

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

        // Register a mouse clicked event handler
        scene.setOnMouseClicked(event -> {
            if (event.isPrimaryButtonDown()) {
                //System.out.println("Hello\nAlexandra Abramov!");
				clickLabel.setText("Mouse Click: Left button clicked");
            }
        });

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

In the exercise above, we create a JavaFX application with a 'VBox' layout containing a 'Label' component to display the mouse click status. We then create a scene and register a mouse click event handler. The event handler checks if the left mouse button (primary button) is clicked and updates the 'clickLabel' accordingly.

Finally when we run the program and left-click the mouse, we will see the message "Mouse Click: Left button clicked."

Sample Output:

Flowchart:

Java Code Editor:

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