Hans

import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.HBox;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;
import javafx.stage.StageStyle;

import java.io.IOException;

public class GUI extends Application {
    private double xOffset = 0;
    private double yOffset = 0;
    @Override
    public void start(Stage primaryStage) throws IOException {


        StackPane root = new StackPane();

        Rectangle verschieben = new Rectangle();
        verschieben.setFill(Color.rgb(230,230,230));
        verschieben.setWidth(1460);
        verschieben.setHeight(20);

        verschieben.setOnMousePressed(new EventHandler<MouseEvent>() {
            @Override
            public void handle(MouseEvent event) {
                xOffset = event.getSceneX();
                yOffset = event.getSceneY();
            }
        });
        verschieben.setOnMouseDragged(new EventHandler<MouseEvent>() {
            @Override
            public void handle(MouseEvent event) {
                primaryStage.setX(event.getScreenX() - xOffset);
                primaryStage.setY(event.getScreenY() - yOffset);
            }
        });

        Scene scene = new Scene(root, 1500, 800, Color.BLACK);

        Rectangle schließen = new Rectangle();
        schließen.setWidth(20);
        schließen.setHeight(20);
        schließen.setFill(Color.rgb(255,102,102,1));
        Rectangle minimieren = new Rectangle();
        minimieren.setWidth(20);
        minimieren.setHeight(20);
        minimieren.setFill(Color.rgb(220,220,220));

        Label willkommen = new Label("Willkommen bei Cards against humanity");
        //Image cl = new Image("M:\\Eigene Bilder");
        //ImageView close = new ImageView(cl);


        schließen.setOnMousePressed(new EventHandler<MouseEvent>() {
            @Override
            public void handle(MouseEvent event) {
                primaryStage.close();
                System.exit(0);
            }
        });

        minimieren.setOnMouseClicked(new EventHandler<MouseEvent>() {
            @Override
            public void handle(MouseEvent event) {
                primaryStage.setIconified(true);
            }
        });
        HBox hbox = new HBox(0);
        hbox.getChildren().addAll(verschieben, minimieren, schließen /*close*/);
        hbox.setAlignment(Pos.TOP_RIGHT);
        VBox vbox = new VBox();
        vbox. getChildren().addAll(hbox,willkommen);


        root.getChildren().addAll(vbox);

        primaryStage.setTitle("Hello World!");
        primaryStage.setScene(scene);
        primaryStage.initStyle(StageStyle.UNDECORATED);
        primaryStage.show();
    }
    public static void main(String[] args) {
        launch(args);
    }

}