Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
How to implement ActionEvent using method reference in JavaFX?
The javafx.event package provides a framework for Java FX events. The Event class serves as the base class for JavaFX events and associated with each event is an event source, an event target, and an event type. An ActionEvent widely used when a button is pressed.
In the below program, we can implement an ActionEvent for a button by using method reference.
Example
import javafx.application.*;
import javafx.beans.property.*;
import javafx.event.*;
import javafx.scene.*;
import javafx.scene.control.*;
import javafx.scene.layout.*;
import javafx.stage.*;
import javafx.scene.effect.*;
public class MethodReferenceJavaFXTest extends Application {
private Label label;
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) {
Pane root = new StackPane();
label = new Label("Method Reference");
Button clickMe = new Button("Click Me");
clickMe.setOnAction(this::handleClickMe); // method reference
root.getChildren().addAll(label, clickMe);
primaryStage.setTitle("Method Reference Test");
primaryStage.setScene(new Scene(root, 300, 200));
primaryStage.show();
}
private void handleClickMe(ActionEvent event) {
if(label.getEffect() == null) {
label.setEffect(new BoxBlur());
} else {
label.setEffect(null);
}
}
}Output
Updated on: 13-Jul-2020
1K+ Views
Advertisements