从另一个类javafx打开新窗口

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

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) {
        Button button = new Button("打开新窗口");
        button.setOnAction(e -> openNewWindow());

        StackPane root = new StackPane();
        root.getChildren().add(button);

        Scene scene = new Scene(root, 300, 200);

        primaryStage.setTitle("主窗口");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

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

    private void openNewWindow() {
        Stage newStage = new Stage();
        newStage.setTitle("新窗口");

        // 创建新窗口的布局和控件
        StackPane root = new StackPane();
        Scene scene = new Scene(root, 200, 150);
        newStage.setScene(scene);

        newStage.show();
    }
}

public class AnotherClass {

    public static void main(String[] args) {
        Main.openNewWindow();
    }
}