App.java

package lsb;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

import java.io.IOException;

public class App extends Application {

    private static Scene scene;
    private static Stage primaryStage;

    @Override
    public void start(Stage stage) throws Exception{

        primaryStage = stage;
        scene = new Scene(loadFXML("main"));
        stage.setTitle("LSB Steganography");
        stage.setScene(scene);
        stage.show();

    }

    static void setRoot(String fxml) throws IOException {
        scene.setRoot(loadFXML(fxml));
    }

    private static Parent loadFXML(String fxml) throws IOException {
        FXMLLoader fxmlLoader = new FXMLLoader(App.class.getResource(fxml + ".fxml"));

        return fxmlLoader.load();
    }

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

    public static Stage getPrimaryStage() {
        return primaryStage;
    }
}