JavaFX Polyline create curve

import javafx.application.Application;
import javafx.collections.ObservableList;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.scene.shape.Line;
import javafx.scene.shape.Polyline;
import javafx.scene.text.Text;
import javafx.stage.Stage;

public class Main extends Application {
   @Override//from  ww  w.j av  a2s . c  om
   public void start(Stage primaryStage) {
      // Create two panes
      Pane pane1 = new Pane();
      pane1.setRotate(180);
      pane1.setPadding(new Insets(72, 0, 0, 75));
      Pane pane2 = new Pane();

      // Create a polyline
      Polyline polyline1 = new Polyline();
      pane1.getChildren().add(polyline1);
      ObservableList<Double> list = polyline1.getPoints();
      double scaleFactor = 0.0125;
      for (int x = -100; x <= 100; x++) {
         list.add(x + 200.0);
         list.add(scaleFactor * x * x);
      }

      // Create two lines
      Line lineX = new Line(10, 200, 350, 200);
      // pane.getChildren().addAll(stackPane, lineX);

      Line lineY = new Line(lineX.getEndX() / 2, 250, lineX.getEndX() / 2, 30);
      pane2.getChildren().addAll(pane1, lineX, lineY);

      // Create two polylines
      Polyline polyline2 = new Polyline();
      pane2.getChildren().add(polyline2);
      ObservableList<Double> list2 = polyline2.getPoints();
      list2.addAll(lineY.getEndX() - 10, lineY.getEndY() + 20, lineY.getEndX(), lineY.getEndY(), lineY.getEndX() + 10,
            lineY.getEndY() + 20);

      Polyline polyline3 = new Polyline();
      pane2.getChildren().add(polyline3);
      ObservableList<Double> list3 = polyline3.getPoints();
      list3.addAll(lineX.getEndX() - 20, lineX.getEndY() - 10, lineX.getEndX(), lineX.getEndY(), lineX.getEndX() - 20,
            lineX.getEndY() + 10);

      // Create two text objects
      Text textX = new Text(lineX.getEndX() - 10, lineX.getEndY() - 20, "X");
      Text textY = new Text(lineY.getEndX() + 20, lineY.getEndY() + 10, "Y");
      pane2.getChildren().addAll(textX, textY);

      // Create a scene and place it in the stage
      Scene scene = new Scene(pane2);
      primaryStage.setTitle("java2s.com");
      primaryStage.setScene(scene);
      primaryStage.show();
   }
}