EJEMPLO DE POLIMORFISMO

CODIGO1 figura.java

public interface Figura {
abstract double area();
abstract double perimetro();
}


CODIGO2
circulo.java

public class Circulo implements Figura {
public double radio;
public static double PI=3.1416;
public double area() { return PI*radio*radio; }
public double perimetro() { return 2*PI*radio; }
}

CODIGO 3
demoFig

public class demoFig {

public demoFig() {
}
public static void main(String args[])

{
Circulo circle=new Circulo();
circle.radio=15;
System.out.println("Area= "+circle.area());




}

}