如何从 FXML 控制器访问在我的主类中初始化的公共字符串

Question

在我的主类中，我有

public class Main extends Application {
    public static void main(String[] args) {
        launch(args);
    }
    public String versionNumber = "v2.1";
    @Override
    public void start(Stage primaryStage) throws Exception{
        // SETTING UP THE STAGE
        Stage window;
        window = primaryStage;
        window.setTitle("Support Tool " + versionNumber);

        // SETTING UP THE SCENES
        Parent parentNewCallDetails = FXMLLoader.load(getClass().getResource("newCallDetails.fxml"));
        Scene scnNewCallDetails = new Scene (parentNewCallDetails, 800, 600);
        // CHOOSING THE SCENE AND SHOWING THE STAGE
        window.setScene(scnNewCallDetails);
        window.show();
    }
}

我本质上希望能够从我的 FXML 控制器中的以下代码中访问字符串版本号，我在其中设置了要启动的下一个场景的标题

public class newCallController {
    // ACTION COMPLETED WHEN CALL BUTTON IS PRESSED
    public void btnCall(MouseEvent event) throws IOException {
        // TODO LAUNCH THE NEXT CALL WINDOW
        Parent fxmlMainCallWindow = FXMLLoader.load(getClass().getResource("mainCallWindow.fxml"));
        Scene scnMainCallWindow = new Scene(fxmlMainCallWindow, 1000, 800);
        Stage window = (Stage)((Node)event.getSource()).getScene().getWindow();
        // THIS IS WHERE I WANT TO ACCESS THE VERSIONNUMBER STRING
        window.setTitle("Support Tool " + versionNumber);
        window.setScene(scnMainCallWindow);
    }
}

Answer 1

您可以使用静态字符串参数定义 Constants 类。您可以在任何地方使用它。喜欢： 常量.版本

public class Constants {
    public static final String VERSION = "v2.1";
}