即使代码在 javafx 中运行，舞台也不会打开

Question

所以，我做了这个简单的代码，它没有显示任何错误或警告，但由于某种原因，当我按下运行时，它没有打开 window。 我不确定哪里出错了。 代码的重点是根据谁尝试登录来显示一个简单的文本。我稍后将对其进行扩展并向其中添加新内容，但现在它只需要按原样运行即可。 这是代码：

public class LogIn extends Application {

    Users Cashier = new Users("Filan", "Fisteku", "ffisteku@gmail.com", 500, 1, "0691234567", "15/01/2000", "open");
    Users Manager = new Users("Mario", "Rossi", "mrossi@gmail.com", 750, 2, "0681234567", "09/08/1995", "lararossi");
    Users Administrator = new Users("John", "Doe", "jdoe1980@gmail.com", 1000, 3, "0697654321", "11/11/1980",
            "password");

    public void start(final Stage stage) {
        // Creating nodes

        final TextField txtField = new TextField();
        final PasswordField pwField = new PasswordField();
        final Button button = new Button("LOGIN");
        button.setTranslateX(250);
        button.setTranslateY(75);
        // Creating labels
        final Label label1 = new Label("Email: ");
        final Label label2 = new Label("Password: ");
        // Setting the message with read data
        final Text text = new Text("");
        Font font = Font.font("Comic Sans", FontWeight.BOLD, FontPosture.REGULAR, 10);
        text.setFont(font);
        text.setTranslateX(15);
        text.setTranslateY(125);
        text.setFill(Color.BLACK);
        // Displaying the message
        button.setOnAction(new EventHandler() {
            public void handle(Event e) {
                // Retrieving data
                final String email = txtField.getText();
                final String pw = pwField.getText();

                if (email.equals(Cashier.email) && pw.equals(Cashier.password)) {
                    text.setText("Hello " + Cashier.name + " " + Cashier.lastname + ". Welcome!");

                }
                if (email.equals(Manager.email) && pw.equals(Manager.password)) {
                    text.setText("Hello " + Manager.name + " " + Manager.lastname + ". Welcome!");

                }
                if (email.equals(Administrator.email) && pw.equals(Administrator.password)) {
                    text.setText("Hello " + Administrator.name + " " + Administrator.lastname + ". Welcome!");

                }
                // Adding labels for nodes
                HBox box = new HBox(5);
                box.setPadding(new Insets(25, 5, 5, 50));
                box.getChildren().add(label1);
                box.getChildren().add(txtField);
                box.getChildren().add(label2);
                box.getChildren().add(pwField);
                Group root = new Group();
                root.getChildren().add(box);
                
// Setting the stage
                Scene scene = new Scene(root, 500, 250, Color.SILVER);
                stage.setTitle("LogIn Site for Tech Store");
                stage.setScene(scene);
                stage.show();
            }
        }

        );
        ;
        ;
        ;
        ;
    }

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

}

Answer 1

你的代码，

// Setting the stage
      Scene scene = new Scene(root, 500, 250, Color.SILVER);
      stage.setTitle("LogIn Site for Tech Store");
      stage.setScene(scene);
      stage.show();

应该从EventHandler method中出来。