如何在JavaFX中创建扩展多边形的类(例如三角形)？

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Polygon;
import javafx.stage.Stage;

public class ExtendedPolygonExample extends Application {

    @Override
    public void start(Stage primaryStage) {
        // 创建一个三角形对象
        Triangle triangle = new Triangle(100, 100, 200, 200, 100, 200);
        triangle.setFill(Color.RED);

        Pane root = new Pane();
        root.getChildren().add(triangle);

        Scene scene = new Scene(root, 300, 300);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    // 自定义的三角形类
    private static class Triangle extends Polygon {
        public Triangle(double... points) {
            super(points);
        }
    }

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