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; 

public class AccessibilityTest extends Application { 
    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); 
        primaryStage.setTitle("Hello World!"); 
        primaryStage.setScene(scene); 
        primaryStage.show(); 
    } 
     
    public static void main(String[] args) { 
        launch(args); 
    } 
}