如何将参数传递给JavaFX应用程序？

问题描述

我正在运行我的JavaFX应用程序：

I am running my JavaFX application like this:

public class MainEntry {
    public static void main(String[] args) {
        Controller controller = new Controller();
        Application.launch(MainStage.class);
    }
}

MainStage class extends Appication 。 Application.launch 在一个特殊的FX线程中启动我的JavaFX窗口，但在我的main方法中，我甚至没有我的 MainStage的实例 class。

MainStage class extends Appication. Application.launch starts my JavaFX window in a special FX-thread, but in my main method I don't even have an instance of my MainStage class.

如何将非String参数（在我的情况下为 controller ）传递给 MainStage 实例？这是一个有缺陷的设计吗？

How to pass non-String parameter (controller in my case) to MainStage instance? Is it a flawed design?

推荐答案

通常，除了传递的程序参数之外，不需要将参数传递给主应用程序到你的主要。人们想要这样做的唯一原因是创建一个可重复使用的应用程序。但是 Application 不需要是可重用的，因为它是组装应用程序的代码片段。将 start 方法想象成新的 main ！

Usually, there is no need to pass arguments to the main application other than the program arguments passed to your main. The only reason why one wants to do this is to create a reusable Application. But the Application does not need to be reusable, because it is the piece of code that assembles your application. Think of the start method to be the new main!

因此，不是编写在 main 方法中配置的可重用应用程序，而应用程序本身应该是配置程序并使用可重用组件在 start 方法中构建应用程序，例如：

So instead of writing a reusable Application that gets configured in the main method, the application itself should be the configurator and use reusable components to build up the app in the start method, e.g.:

public class MyApplication extends Application {

    @Override
    public void start(Stage stage) throws Exception {
        // Just on example how it could be done...
        Controller controller = new Controller();
        MyMainComponent mainComponent = new MyMainComponent(controller);
        mainComponent.showIn(stage);
    }

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

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