JavaFX Circle create smiley face

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Arc;
import javafx.scene.shape.ArcType;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Ellipse;
import javafx.scene.shape.Polygon;
import javafx.stage.Stage;

public class Main extends Application {
  @Override//w w w. ja v a  2 s .  c o  m
  public void start(Stage primaryStage) {
    SmileyPane pane = new SmileyPane(200);
    pane.setPadding(new Insets(20));

    Scene scene = new Scene(pane);
    primaryStage.setTitle("java2s.com");
    primaryStage.setScene(scene);
    primaryStage.setResizable(false);
    primaryStage.show();
  }

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

class SmileyPane extends StackPane {
  SmileyPane(double radius) {
    // Container for all of the shapes
    Pane pane = new Pane();

    // Make a circle for the head
    Circle head = new Circle(radius, radius, radius);
    head.setFill(Color.WHITE);
    head.setStroke(Color.BLACK);

    // Make an arc for the mouth
    Arc mouth = new Arc(radius, radius + radius / 2.7, radius / 2, radius / 5, 180, 180);
    mouth.setType(ArcType.OPEN);
    mouth.setFill(Color.WHITE);
    mouth.setStroke(Color.BLACK);

    // Make a three-sided polygon for the nose
    double factor = 5;
    double topX = radius;
    double topY = radius - radius / factor;
    double leftX = topY;
    double leftY = radius + radius / factor;
    double rightX = leftY;
    double rightY = leftY;
    Polygon nose = new Polygon(topX, topY, leftX, leftY, rightX, rightY);
    nose.setFill(Color.WHITE);
    nose.setStroke(Color.BLACK);

    // Eye Whites
    Ellipse leftEyeWhite = new Ellipse(radius - radius / 3, radius - radius / 3, radius / 5, radius / 8);
    leftEyeWhite.setFill(Color.WHITE);
    leftEyeWhite.setStroke(Color.BLACK);
    Ellipse rightEyeWhite = new Ellipse(radius + radius / 3, radius - radius / 3, radius / 5, radius / 8);
    rightEyeWhite.setFill(Color.WHITE);
    rightEyeWhite.setStroke(Color.BLACK);

    // Eye Pupils
    Circle leftEyePupil = new Circle(leftEyeWhite.getCenterX(), leftEyeWhite.getCenterY(),
        leftEyeWhite.getRadiusX() / 2);
    Circle rightEyePupil = new Circle(rightEyeWhite.getCenterX(), rightEyeWhite.getCenterY(),
        rightEyeWhite.getRadiusX() / 2);

    // Add shapes to container
    pane.getChildren().addAll(head, mouth, nose, leftEyeWhite, leftEyePupil, rightEyeWhite, rightEyePupil);

    // Add container to StackPane
    getChildren().add(pane);
  }
}