Shapetest.java

import java.util.*;
abstract class shape{
 abstract void numberofsides();
}
class triangle extends shape{
 void numberofsides(){
 System.out.println("the number of sides of triangle is 3\n");
 }
}
class Rectangle extends shape{
 void numberofsides(){
 System.out.println("the number of sides of rectangle is 4\n");
}
}
class hexagon extends shape{
 void numberofsides(){
 System.out.println("the number of sides of hexagon is 6\n");
 }
}
class Shapetest{
 public static void main(String Args[]){
 triangle t=new triangle();
 Rectangle r=new Rectangle();
 hexagon h=new hexagon();
 t.numberofsides();
 r.numberofsides();
 h.numberofsides();
 }
}