Question

当我使用Swing时，这是我的代码片段：

private static Gui gui;

public static void main(String[] args){
    gui = new Gui(); //(1)
    gui.menu();      //(2)
    gui.show();      //(3)
}

构造函数初始化JFrame
创建JLabel和JPanel并将它们添加到框架中。
将框架可见性设置为true。

我一直在尝试，但我无法使用Java-FX获得我想要的结果。这就是我上次尝试的方式：

private static Gui gui;

public static void main(String[] args){
    gui = new Gui();
    Application.launch(Gui.class, args);
    gui.menu();
    gui.show();
}

桂班：

private static Stage stage;

public class Gui extends Application {

    publc void start(Stage primaryStage){

    Gui.stage = primaryStage;
    stage.setTitle("title");

    //I read that some method blocking is involved here, I want to go back!
    }

    public void menu(){

    BorderPane abc = new BorderPane();
    Scene scene = new Scene(abc, 200, 200);
    stage.setScene(scene);

    //if I somehow mange to reach this part, there will be some null pointer
    //exception, well everything looks real initialised to me
    }

    public void show(){

    stage.show();

    //I have never reach this part
    }
}

Answer 1

最简单的方法是使用Application.launch，如下所示：

package gui;

import javafx.application.Application;


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

让你的班级像这样：

package gui;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;

public class Gui extends Application {
    private Scene scene;
    private Stage stage;

    @Override
    public void start(Stage stage) {
        this.stage=stage;
        Button btn = new Button("test");
        this.scene = new Scene(btn, 200, 250);
        stage.setTitle("title");
        stage.setScene(scene);
        stage.show();
    }

    public void menu(){

    BorderPane abc = new BorderPane();
    this.scene = new Scene(abc, 200, 200);
    this.stage.setScene(scene);

    //if I somehow mange to reach this part, there will be some null pointer
    //exception, well everything looks real initialised to me
    }
}

您想要实现的目标有更多样本here。

试图将Swing转换为Java-FX

1 个答案: