@@ -0,0 +1,368 @@
+/**%0A * Created by hajarboulhdir on 02/10/2016.%0A */%0Apublic class Sphere extends Shape3D%7B%0A    private double radius;%0A    public double volume()%7B%0A        return( 4.0 / 3.0 ) * Math.PI * Math.pow( this.radius, 3.0 );%0A%0A    %7D%0A%0A    @Override%0A    public double surface() %7B%0A        return 0;%0A    %7D%0A%0A    @Override%0A    public Point3D getRefPoint() %7B%0A        return null;%0A    %7D%0A%7D%0A

Add Sphere class.