Slip22. Define an Interface Shape
with abstract method area(). Write a java program to calculate an area of
Circle and Sphere.(use final keyword)
interface shape
{
final static float pi=3.14f;
float area(float r);
}
class Circle implements shape
{
public float area(float r)
{
return(3.14f*r*r);
}
}
class sphere implements shape
{
public float area(float r)
{
return(2*3.14f*r*r);
}
}
class Main
{
public static void main(String
args[])
{
Circle cir=new Circle();
sphere sp=new sphere();
shape s;
s=cir;
System.out.println("Area of
Circle:"+s.area(3));
s=sp;
System.out.println("Area of
Sphere:"+s.area(5));
}
}
