java program on Abstract class named triagle,hexagon

java program on Abstract class named triagle,hexagon

Save as AbstractDemo.java

abstract class shape

{

    void numberofsides()

{

   System.out.println("This is for abstract class");

}

}

class Trapezoid extends shape

{

   void numberofsides()

{

System.out.println("It is having 4 sides");

}

}

class Triangle extends shape

{

 void numberofsides()

{

System.out.println("it is having 3 sides");

}

}

class Hexagonal extends shape

{

 void numberofsides()

{

System.out.println("it is having 6 sides");

}

}

class AbstractDemo

{

public static void main(String args[])

{

  Trapezoid tz=new Trapezoid();

Triangle t=new Triangle();

Hexagonal h=new Hexagonal();

tz.numberofsides();

t.numberofsides();

h.numberofsides();

}

}