Arc

An Arc is part of an Ellipse. In the picture, the Arc is drawn in red against the Ellipse that it is part of. Here is the program:

import javafx.stage.*;
import javafx.scene.Scene;  
import javafx.scene.shape.*;
import javafx.scene.paint.*;
import javafx.scene.layout.*; 
  
public class ArcSimple extends Application
{
  public void start( Stage primaryStage )
  {
    final double width = 400.0, height = 300.0;
    double centerX, centerY;  // center of ellipse and arc
    double radiusX, radiusY;  // radii of ellipse and arc
    double startAngle = 15.0; // angle to start drawing the arc
    double length = 90.0;     // number of degrees to draw
    
    centerX = width/2; centerY=height/2; 
    radiusX = width*0.4; radiusY=width*0.3;
    Ellipse ellipse = new Ellipse( centerX,  centerY,  radiusX,  radiusY );
    ellipse.setFill( Color.IVORY );
    
    Arc arc = new Arc( centerX,  centerY,  radiusX,  radiusY, startAngle, length );
    arc.setFill( Color.TRANSPARENT );
    arc.setStroke( Color.RED );
    arc.setType( ArcType.ROUND ); // Three types of Arc can go here
    arc.setStrokeWidth( 2.0 );
 
    Pane pane = new Pane( ellipse, arc );
    Scene scene = new Scene( pane, width, height, Color.LIGHTGREY );
    
    primaryStage.setTitle("Arc and its Ellipse");
    primaryStage.setScene( scene );
    primaryStage.show();
  }
}

Arc(double centerX, double centerY, double radiusX, double radiusY, double startAngle, double length)