如何判断是哪个TextField触发了JavaFX中的EventHandler？

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.TextField;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class TextFieldEventExample extends Application {

    @Override
    public void start(Stage primaryStage) {
        TextField textField1 = new TextField();
        TextField textField2 = new TextField();

        EventHandler<ActionEvent> eventHandler = new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                if (event.getSource() == textField1) {
                    System.out.println("TextField1 triggered the event.");
                } else if (event.getSource() == textField2) {
                    System.out.println("TextField2 triggered the event.");
                }
            }
        };

        textField1.setOnAction(eventHandler);
        textField2.setOnAction(eventHandler);

        VBox root = new VBox(textField1, textField2);
        Scene scene = new Scene(root, 200, 200);

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

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