Write a java program to create an abstract class named Shape that contains an empty method named numberofSides ( ).Provide three classes named Trapezoid, Triangle and Hexagon such that each one of the classes extends the class Shape. Each one of the classes contains only the method numberofSides ( ) that shows the number of sides in the given geometrical figures.

//Program to print number of sides for differet shapes
abstract class Shape{
 abstract void numberofsides();
}
class Trapezoid extends Shape{
            void numberofsides()
            {
                        System.out.println("Number of sides of Trapeziod is : 4");
            }
}
class Triangle extends Shape
{
            void numberofsides()
            {
                        System.out.println("Number of sides of Triangle is : 3");
            }
}
class Hexagon extends Shape
{
            void numberofsides()
            {
                        System.out.println("Number of sides of Hexagon is : 6");
            }
}
class Sides
{
            public static void main(String args[])
            {
                        Shape s;
                        s=new Trapezoid();
                        s.numberofsides();
                        s=new Triangle();
                        s.numberofsides();
                        s=new Hexagon();
                        s.numberofsides();      
                       
            }
}