将信息传递给JavaFX按钮句柄()例程

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 Main extends Application {

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

    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("JavaFX Button Example");

        Button button = new Button();
        button.setText("Click me!");

        // 创建事件处理程序类
        MyEventHandler eventHandler = new MyEventHandler();

        // 将事件处理程序类作为参数传递给按钮的setOnAction方法
        button.setOnAction(eventHandler);

        StackPane root = new StackPane();
        root.getChildren().add(button);
        primaryStage.setScene(new Scene(root, 300, 250));
        primaryStage.show();

        // 调用按钮的fire方法来触发按钮点击事件，并传递信息作为参数
        button.fireEvent(new ActionEvent("Hello, JavaFX!", button));
    }

    // 事件处理程序类
    private class MyEventHandler implements EventHandler<ActionEvent> {
        @Override
        public void handle(ActionEvent event) {
            // 处理按钮点击事件
            if (event.getSource() instanceof Button) {
                Button button = (Button) event.getSource();
                String message = (String) event.getSource().getUserData();
                System.out.println("Button clicked: " + button.getText());
                System.out.println("Message received: " + message);
            }
        }
    }
}