Explanation of Solution
Event handler:
- The event handler is nothing but an object that responds to the events.
- A particular method in the event handler is called if an event source is connected to the event handler. The object of the event is passed as the argument to that method.
- This process is known as event firing.
- The event handler class should implement the “EventHandler” interface.
- This interface is in the package “javafx.event”.
Step 1: Register the instance of the class with “myButton” control. It is done with the help of the statement “setOnAction (new ButtonClickHandler ())”.
Statement to register an instance of the class with “myButton” control:
//Register the event handler
myButton.setOnAction(new ButtonClickHandler ());
Example program:
The statement to register the instance of the class with “myButton” control is highlighted.
//Import required packages
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Pos;
import javafx.geometry.Insets;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.VBox;
import javafx.scene.control.Label;
import javafx.scene.control.Button;
//Declare the main class
public class Example extends Application
{
//Create a label
private Label outputLabel;
//Declare the main method
public static void main(String[] args)
{
// Launch the application.
launch(args);
}
//Override the start method
@Override
public void start(Stage primaryStage)
{
//Create a label
outputLabel = new Label();
//Create a button
Button myButton = new Button ("Click Me");
//Register the event handler
myButton...
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