How to generate a QR Code from a String and show it in JavaFX

QRCodeGenerator.java

/**
 * Created by Jerry on 24.09.2015.
 */

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;
import net.glxn.qrgen.QRCode;
import net.glxn.qrgen.image.ImageType;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;

// QRCode Gradle dependency: compile 'net.glxn:qrgen:1.4'
public class QRCodeGenerator extends Application {

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

    @Override
    public void start(Stage primaryStage) {
        // GENERATE QR CODE
        ByteArrayOutputStream out = QRCode.from("LT Jerry0022").to(ImageType.PNG).withSize(200, 200).stream();
        ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());

        // SHOW QR CODE
        BorderPane root = new BorderPane();
        Image image = new Image(in);
        ImageView view = new ImageView(image);
        view.setStyle("-fx-stroke-width: 2; -fx-stroke: blue");
        root.setCenter(view);
        Scene scene = new Scene(root, 200, 200);
        primaryStage.setScene(scene);
        primaryStage.show();
    }
}

how to save generated image in my project