import javafx.application.Application;
import javafx.scene.canvas.Canvas;
import javafx.scene.Scene;
import javafx.scene.Group;
import javafx.stage.Stage;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.shape.ArcType;

public class HappyFace extends Application
{
   public static void main(String[] args)
   {
      launch(args);
   }

   @Override
   public void start(Stage primaryStage) throws Exception
   {
	  Group root = new Group();
   	  Scene scene = new Scene(root);

      Canvas canvas = new Canvas(400, 300);
      GraphicsContext gc = canvas.getGraphicsContext2D();
      gc.strokeOval(100, 50, 200, 200);
	  gc.fillOval(155, 100, 10, 20);
	  gc.fillOval(230, 100, 10, 20);
	  gc.strokeArc(150, 160, 100, 50, 180, 180, ArcType.OPEN);

      root.getChildren().add(canvas);
      primaryStage.setTitle("HappyFace in JavaFX");
      primaryStage.setScene(scene);
      primaryStage.show();
   }
}