分组多个矩形

Question

我需要使用6个矩形进行旋转。 我想连接矩形，但不能。 怎么做？谢谢！ （我不能使用盒子，只能使用矩形！）

我尝试了Union。 然后我尝试了这个小组。

FXML控制器：

package rectangle3dfxml;

import java.net.URL;
import java.util.ResourceBundle;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.Group;
import javafx.scene.control.Slider;
import javafx.scene.layout.AnchorPane;
import javafx.scene.shape.Rectangle;
import javafx.scene.transform.Rotate;
import javafx.scene.shape.Shape;

public class FXMLDocumentController implements Initializable {
    @FXML
    private AnchorPane AnchorPane1;    
    @FXML
    private Slider sliderY; 
    @FXML
    private Slider sliderX; 
    @FXML
    private Slider sliderZ;    
    @FXML
    private Rectangle rectangleRed;    
    @FXML
    private Rectangle rectangleBlue; 
    @FXML
    private Rectangle rectangleGreen;  
    @FXML
    private Rectangle rectangleYellow;   
    @FXML
    private Rectangle rectangleBlack;    
    @FXML
    private Rectangle rectanglePurple;
    @Override
    public void initialize(URL url, ResourceBundle rb) {
        // TODO
//attempt #1
//    Shape unionShape1 = Shape.union(rectangleRed,rectangleBlue);
//    Shape unionShape2 = Shape.union(rectangleGreen,rectangleYellow);
//    Shape unionShape3 = Shape.union(rectangleBlack, rectanglePurple);
//    Shape unionShape4 = Shape.union(unionShape1, unionShape2);  
//    Shape unionShape5 = Shape.union(unionShape4, unionShape3);

//attempt #2
        Group group = new Group();
        group.getChildren().addAll(rectangleRed,rectangleBlue,rectangleGreen,rectangleYellow,rectangleBlack,rectanglePurple);


        sliderX.valueProperty().addListener((observable, oldValue, newValue) -> {
         group.setRotationAxis(Rotate.X_AXIS);
         group.setRotate((double) newValue);
        }); 

        sliderY.valueProperty().addListener((observable, oldValue, newValue) -> {
         group.setRotationAxis(Rotate.Y_AXIS);
         group.setRotate((double) newValue);
        }); 

        sliderZ.valueProperty().addListener((observable, oldValue, newValue) -> {
         group.setRotationAxis(Rotate.Z_AXIS);
         group.setRotate((double) newValue);
        }); 
    }    

}

我没有收到错误消息。 但这不起作用。 我只看到3个滑块。