Witam ma problem z obsługą przyciski ale w innej klasie. W osobnej klasie nie mogę zobaczyć przycisku.

package com.kelthuzad.GUI;

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

public class LoginWindow extends Application {

    private final static ActionEventLoginWindow actionEventLoginWindow = new ActionEventLoginWindow();

    static Button buttonLogin, buttonExit;
    TextField textFieldLogin;
    PasswordField passwordField;

    public static Button getButtonLogin() {
        return buttonLogin;
    }

    public static void setButtonLogin(Button buttonLogin) {
        LoginWindow.buttonLogin = buttonLogin;
    }

    public void start(Stage primaryStage) throws Exception {
        primaryStage.setTitle("Logowanie");

        buttonLogin = new Button("Login");
        buttonLogin.setOnAction(actionEventLoginWindow::handle);
        buttonExit = new Button("Exit");

        textFieldLogin = new TextField("login");
        passwordField = new PasswordField();

        StackPane stackPane = new StackPane();
//        stackPane.getChildren().add(textFieldLogin);
//        stackPane.getChildren().add(passwordField);
        stackPane.getChildren().add(buttonLogin);
//        stackPane.getChildren().add(buttonExit);

        Scene scene = new Scene(stackPane, 300,300);

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

//    public void handle(ActionEvent event) {
//
//    }
}
package com.kelthuzad.GUI;

import javafx.event.ActionEvent;
import javafx.event.EventHandler;

public class ActionEventLoginWindow implements EventHandler<ActionEvent> {

    public static LoginWindow loginWindow = new LoginWindow();

    public void handle(ActionEvent event) {
        if (event.getSource() == loginWindow.get)
            System.out.println("tyak");
    }
}