Basic Interface Problem - 1 in Java.

Main Class:

 

package interface_1;

public class Interface_1

{

    public static void main(String[] args) {

       

        Flyable f = new Bird();

       

         f.fly();

        ((Bird)f).eat();

        System.out.println("Bird need Fuel: "+ f.needFuel());

    }

   

}

Interface Class:

package interface_1;

public class Interface_1

{

    public static void main(String[] args) {

       

        Flyable f = new Bird();

       

         f.fly();

        ((Bird)f).eat();

        System.out.println("Bird need Fuel: "+ f.needFuel());

    }

   

}

Bird Class:

package interface_1;

public class Bird implements Flyable

{

    @Override

    public void fly()

    {

        System.out.println("Birds Fly in the "+Flyable.media);

    }

    @Override

    public boolean needFuel()

    {

       return false;

    }

   

    public void eat()

    {

        System.out.println("Birds Eat");

    }

     

}