JavaFX Rectangle set fill color

import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.layout.BorderPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.scene.text.Text;
import javafx.stage.Stage;

public class Main extends Application {
  @Override//from   w  w  w  .j  a  v  a 2 s  .c o  m
  public void start(Stage primaryStage) {

    // Create a group and add nodes to the group
    Group group = new Group();
   
    for (int i = 0; i < 4; i++) {
      Rectangle r = new Rectangle(100, 50, 100, 30);
      r.setRotate(i * 360 / 8);
      r.setStroke(Color.color(Math.random(), Math.random(), Math.random()));
      r.setFill(Color.WHITE);
      group.getChildren().add(r);
    }

    Scene scene = new Scene(new BorderPane(group), 250, 150);
    primaryStage.setTitle("ShowRectangle");
    primaryStage.setScene(scene);
    primaryStage.show();
  }

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